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ISHIKAWA　Ryo
Mathematics, Electronics and Informatics DivisionAssistant Professor
Department of Electrical Engineering,Electronics, and Applied Physics

Researcher information

■ Field Of Study
  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Electric/electronic material engineering
■ Career
  • Apr. 2022 - Present, Saitama University, Graduate School of Science and Engineering, Japan
■ Educational Background
  • Apr. 2010 - Mar. 2013, Saitama University, Graduate School of Science and Engineering, Japan
  • Apr. 2008 - Mar. 2010, Saitama University, Graduate School of Science and Engineering, Japan
  • Apr. 2004 - Mar. 2008, Saitama University, Faculty of Science, Department of Chemistry, Japan

Performance information

■ Paper
  • Fabrication of efficient methylammonium-free perovskite thin-film solar cells without post-treatment and antisolvent　　　　　　　　　　　　　　　
    Ryo Ishikawa
    Next Materials, Volume：6, First page：100283, Last page：100283, Jan. 2025, [Reviewed], [Lead, Corresponding]
    Elsevier BV, Scientific journal
    DOI：https://doi.org/10.1016/j.nxmate.2024.100283
    DOI ID：10.1016/j.nxmate.2024.100283, ISSN：2949-8228
  • Inverted-Structured Perovskite Solar Cells with a TiO2 Electron-Collector Layer Formed at Room Temperature from Titanium Halide Solutions
    Atsushi Kogo; Ryo Ishikawa; Takurou N. Murakami
    ACS Applied Energy Materials, Sep. 2024, [Reviewed]
    American Chemical Society (ACS), Scientific journal
    DOI：https://doi.org/10.1021/acsaem.4c01226
    DOI ID：10.1021/acsaem.4c01226, ISSN：2574-0962, eISSN：2574-0962
  • Polyelectrolyte-assisted uniform electron transporting layer on texture substrate for perovskite solar cells
    Ryo Ishikawa
    Chemistry Letters, Aug. 2024, [Reviewed], [Lead, Corresponding]
    Abstract

    Organic-inorganic halide perovskite solar cells using textured transparent conductive films exhibit high efficiencies with improved short-circuit current density. However, uniform electron transport layer (ETL) deposition on textures by solution process is challenging. In this study, uniform ETL were formed by sequentially spin-coating polyelectrolyte with positively and negatively charged segments and negative SnO2 colloids solution and electrostatically enhancing the SnO2 coverage. The stabilized power output (SPO) was improved from 12.9% to 18.6% by incorporating this polyelectrolyte/SnO2 bilayer.
    Oxford University Press (OUP), Scientific journal
    DOI：https://doi.org/10.1093/chemle/upae158
    DOI ID：10.1093/chemle/upae158, ISSN：0366-7022, eISSN：1348-0715, 共同研究・競争的資金等ID：42374807
  • Coherent optical response driven by non-equilibrium electron–phonon dynamics in a layered transition-metal dichalcogenide
    Takumi Fukuda; Kotaro Makino; Yuta Saito; Paul Fons; Atsushi Ando; Takuya Mori; Ryo Ishikawa; Keiji Ueno; Jessica Afalla; Muneaki Hase
    APL Materials, Volume：12, Number：2, Feb. 2024, [Reviewed]
    Layered transition-metal dichalcogenides (TMDs) are model systems to explore ultrafast many-body interactions and various nonlinear optical phenomena. For the application of TMD-based optoelectronic devices capable of ultrafast response, it is essential to understand how characteristic electron–hole and electron–phonon couplings modify ultrafast electronic and optical properties under photoexcitation. Here, we investigate the sub-picosecond optical responses of layered semiconductor 2H–MoTe2 in the presence of an electron–hole (e–h) plasma and a long-lived coherent phonon. Transient reflectivity measurements depending on photon energy reveal that the optical response for short-time delays (< 1ps) was significantly modified by band-gap renormalization and state filling due to the presence of the e–h plasma. Furthermore, octave, sum, and difference phonon frequencies transiently appeared for the early time delays (< 2ps). The emergent multiple phonon frequencies can be described as higher-order optical modulations due to deformation-potential electron–phonon coupling under resonant photoexcitation conditions. This work provides comprehensive insights into fundamental physics and the application of non-equilibrium quasiparticle generations on TMDs under time-periodic phonon driving forces.
    AIP Publishing, Scientific journal
    DOI：https://doi.org/10.1063/5.0188537
    DOI ID：10.1063/5.0188537, eISSN：2166-532X
  • Ultrafast melting of charge-density wave fluctuations at room temperature in 1T-TiSe2 monitored under non-equilibrium conditions
    Yu Mizukoshi; Takumi Fukuda; Yuta Komori; Ryo Ishikawa; Keiji Ueno; Muneaki Hase
    Applied Physics Letters, Volume：122, Number：24, Jun. 2023, [Reviewed]
    We investigate the ultrafast lattice dynamics in 1T-TiSe2 using femtosecond reflection pump–probe and pump–pump–probe techniques at room temperature. The time-domain signals and Fourier-transformed spectra show the A1g phonon mode at 5.9 THz. Moreover, we observe an additional mode at ≈ 3 THz, corresponding to the charge-density wave (CDW) amplitude mode (AM), which is generally visible below Tc≈200 K. We argue that the emergence of the CDW amplitude mode at room temperature can be a consequence of fluctuations of order parameters based on the additional experiment using the pump–pump–probe technique, which exhibited suppression of the AM signal within the ultrafast timescale of ∼0.5 ps.
    AIP Publishing, Scientific journal
    DOI：https://doi.org/10.1063/5.0153161
    DOI ID：10.1063/5.0153161, ISSN：0003-6951, eISSN：1077-3118
  • State-of-the-Art of Solution-Processed Crystalline Silicon/Organic Heterojunction Solar Cells: Challenges and Future
    Jaker Hossain; A. T. M. Saiful Islam; Koji Kasahara; Ryo Ishikawa; Keiji Ueno; Hajime Shirai
    Challenges and Advances in Computational Chemistry and Physics, First page：33, Last page：56, May 2021
    Springer International Publishing, In book
    DOI：https://doi.org/10.1007/978-3-030-69445-6_2
    DOI ID：10.1007/978-3-030-69445-6_2, ISSN：2542-4491, eISSN：2542-4483, SCOPUS ID：85105977440
  • Solution-processed TiO2 as a hole blocking layer in PEDOT:PSS/n-Si heterojunction solar cells
    Md. Enamul Karim; A.T.M. Saiful Islam; Yuki Nasuno; Abdul Kuddus; Ryo Ishikawa; Hajime Shirai
    EPJ Photovoltaics, Volume：11, First page：7, Last page：7, Jul. 2020, [Reviewed]
    The junction properties at the solution-processed titanium dioxide (TiO2)/n-type crystalline Si(n-Si) interface were studied for poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS)/n-Si heterojunction solar cells by the steady-state photovoltaic performance and transient reverse recovery characterizations. The power conversion efficiency could be increased from 11.23% to 13.08% by adjusting the layer thickness of TiO2 together with increasing open-circuit voltage and suppressed dark saturation current density. These findings originate from the enhancement of the carrier collection efficiency at the n-Si/cathode interface. The transient reverse recovery characterization revealed that the surface recombination velocity S was ∼375 cm/s for double TiO2 interlayer of ∼2 nm thickness. This value was almost the same as that determined by microwave photoconductance decay measurement. These findings suggest that solution-processed TiO2 has potential as a hole blocking layer for the crystalline Si photovoltaics.
    EDP Sciences, Scientific journal
    DOI：https://doi.org/10.1051/epjpv/2020004
    DOI ID：10.1051/epjpv/2020004, eISSN：2105-0716
  • Effect of thermally annealed atomic-layer-deposited AlOx/chemical tunnel oxide stack layer at the PEDOT:PSS/n-type Si interface to improve its junction quality　　　　　　　　　　　　　　　
    Md Enamul Karim; Yuki Nasuno; Abdul Kuddus; Tomofumi Ukai; Shunji Kurosu; Masahide Tokuda; Yasuhiko Fujii; Tatsuro Hanajiri; Ryo Ishikawa; Keiji Ueno; Hajime Shirai
    JOURNAL OF APPLIED PHYSICS, Volume：128, Number：4, Jul. 2020, [Reviewed]
    We investigated the effects of thermal annealing on an atomic layer deposition-fabricated AlOx/chemical tunnel oxide (ch-SiOx) stack layer, for passivating and enhancing the field-inversion at the poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS)/n-type crystalline Si (n-Si) interface. Annealing in N-2/H-2 forming gas at 560 degrees C for 30min increased the effective minority carrier lifetime (tau(eff)) of the AlOx/ch-SiOx stack layer to 300-331 mu s, which decreased sheet resistance and enhanced the built-in potential and open-circuit voltage in PEDOT:PSS/n-Si heterojunction solar cells to 750mV and 645mV, respectively. These improvements originate from the local chemical bond configuration of the tunnel oxide ch-SiOx, which determines the passivation ability and band alignment at the AlOx/n-Si interface.
    AMER INST PHYSICS, English, Scientific journal
    DOI：https://doi.org/10.1063/5.0007918
    DOI ID：10.1063/5.0007918, ISSN：0021-8979, eISSN：1089-7550, Web of Science ID：WOS:000556325800003
  • Synthesis of AlOx thin films by atmospheric-pressure mist chemical vapor deposition for surface passivation and electrical insulator layers
    Arifuzzaman Rajib; Karim Md Enamul; Shunji Kurosu; Tomofumi Ukai; Masahide Tokuda; Yasuhiko Fujii; Tatsuro Hanajiri; Ryo Ishikawa; Keiji Ueno; Hajime Shirai
    Journal of Vacuum Science & Technology A, Volume：38, Number：3, First page：033413, Last page：033413, May 2020
    American Vacuum Society, Scientific journal
    DOI：https://doi.org/10.1116/1.5143273
    DOI ID：10.1116/1.5143273, ISSN：0734-2101, eISSN：1520-8559
  • Improved efficiency of methylammonium-free perovskite thin film solar cells by fluorinated ammonium iodide treatment　　　　　　　　　　　　　　　
    Ryo Ishikawa; Keiji Ueno; Hajime Shirai
    Organic Electronics, Volume：78, First page：105596, Last page：105596, Mar. 2020, [Reviewed], [Lead, Corresponding]
    Elsevier BV, Scientific journal
    DOI：https://doi.org/10.1016/j.orgel.2019.105596
    DOI ID：10.1016/j.orgel.2019.105596, ISSN：1566-1199, ORCID：66687394
  • Self-assembled Fluorinated Polymer Passivation Layer for Efficient Perovskite Thin-film Solar Cells
    Yuma Moriya; Ryo Ishikawa; Shuhei Akiyama; Keiji Ueno; Hajime Shirai
    Chemistry Letters, Volume：49, Number：1, First page：87, Last page：90, Jan. 2020, [Reviewed], [Corresponding]
    Oxford University Press (OUP), Scientific journal
    DOI：https://doi.org/10.1246/cl.190692
    DOI ID：10.1246/cl.190692, ISSN：0366-7022, eISSN：1348-0715, ORCID：65263763
  • Role of the solvent in large crystal grain growth of inorganic-organic halide FA0.8Cs0.2PbIxBr3 − x perovskite thin films monitored by ellipsometry
    Koki Kawamura; Ryo Ishikawa; Yoko Wasai; Nataliya Nabatova-Gabain; Shun-ji Kurosu; Tomofumi Ukai; Masahide Tokuda; Yasuhiko Fujii; Tatsuro Hanajiri; Keiji Ueno; Hajime Shirai
    Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena, Volume：37, Number：6, First page：062401, Last page：062401, Oct. 2019, [Reviewed]
    The role of an additional solvent thiosemicarbazide (TSC) in the synthesis of a highly crystallized inorganic–organic halide FA0.8Cs0.2PbIxBr3 − x perovskite using the co-solvent N,N-dimethylformamide/1-cyclohexyl-2-pyrrolidone has been investigated. Ellipsometry combined with x-ray diffraction and FTIR spectroscopy was used for characterization purposes. The average crystal grain size increased from several hundred nanometers to 1–1.5 μm with increasing content of TSC in the co-solvent. Ellipsometry and FTIR spectroscopy revealed that the as-deposited perovskite film before thermal annealing was distorted and featured a large number of voids; also, the Pb ions formed complexes with the C˭S groups in TSC, which suppressed the excessive nucleation. Removal of the co-solvent at the thermal annealing stage facilitated the rearrangement of the [Pb(IxBr3 − x)6]4− octahedral structure from a zero-dimensional to a three-dimensional network, which enhanced crystal grain growth.
    American Vacuum Society, Scientific journal
    DOI：https://doi.org/10.1116/1.5123399
    DOI ID：10.1116/1.5123399, ISSN：2166-2746, eISSN：2166-2754, ORCID：65263772
  • Highly crystalline large-grained perovskite films using two additives without an antisolvent for high-efficiency solar cells　　　　　　　　　　　　　　　
    Ryo Ishikawa; Keiji Ueno; Hajime Shirai
    Thin Solid Films, Volume：679, First page：27, Last page：34, Jun. 2019, [Reviewed], [Lead, Corresponding]
    Elsevier BV, Scientific journal
    DOI：https://doi.org/10.1016/j.tsf.2019.03.030
    DOI ID：10.1016/j.tsf.2019.03.030, ISSN：0040-6090, ORCID：65263783
  • Thiocyanate Containing Two-Dimensional Cesium Lead Iodide Perovskite, Cs2PbI2(SCN)(2): Characterization, Photovoltaic Application, and Degradation Mechanism　　　　　　　　　　　　　　　
    Youhei Numata; Yoshitaka Sanehira; Ryo Ishikawa; Hajime Shirai; Tsutomu Miyasaka
    ACS APPLIED MATERIALS & INTERFACES, Volume：10, Number：49, First page：42363, Last page：42371, Dec. 2018, [Reviewed]
    We explored thiocyanate (SCN)-based two-dimensional (2D) organometal lead halide perovskite families toward photovoltaic applications. Using an SCN axial ligand and various cation species, we examined AA'PbI2(SCN)(2)-type 2D perovskite by replacing the cation species (AA') between methylammonium (MA), formamidinium (FA), and cesium. Among various cation compositions, only all-inorganic cesium-based SCN perovskite, Cs2PbI2(SCN)(2), film showed high thermal stability compared to known 2D perovskites. Perovskite solar cells (PSCs) using the Cs2PbI2(SCN)(2) absorber yielded approximately 2% conversion efficiency on the mesoscopic device. Relatively low efficiency is attributed, in addition to optical properties (large band gap (2.05 eV) and exciton absorption), to the orientation of perovskite layer parallel to the layered structure, preventing carrier extraction from the light-absorber perovskite. In device stability, the Cs-based 2D perovskite was stable against oxygen (oxidation), whereas it was found to be unstable against humidity. X-ray diffraction and X-ray photoelectron spectroscopy measurements showed that, unlike long alkylammonium-based 2D perovskite families such as BA(2)PbI(4) (BA = butylammonium), the Cs-based 2D perovskite can undergo hydrolysis due to the hydrophilic Cs cations.
    AMER CHEMICAL SOC, English, Scientific journal
    DOI：https://doi.org/10.1021/acsami.8b15578
    DOI ID：10.1021/acsami.8b15578, ISSN：1944-8244, eISSN：1944-8252, Web of Science ID：WOS:000453488900057
  • Fabrication of [CH(NH2)2]0.8Cs0.2PbI3 Perovskite Thin Films for n-i-p Planar-structure Solar Cells by a One-step Method Using 1-Cyclohexyl-2-pyrrolidone as an Additive
    Ryo Ishikawa; Keiji Ueno; Hajime Shirai
    Chemistry Letters, Volume：47, Number：7, First page：905, Last page：908, Jul. 2018, [Reviewed], [Lead, Corresponding]
    Oxford University Press (OUP), Scientific journal
    DOI：https://doi.org/10.1246/cl.180216
    DOI ID：10.1246/cl.180216, ISSN：0366-7022, eISSN：1348-0715, ORCID：50286557
  • Crystalline-Si heterojunction with organic thin-layer (HOT) solar cell module using poly (3, 4-ethylenedioxythiophene): poly (styrene sulfonate)(PEDOT: PSS)　　　　　　　　　　　　　　　
    Kasahara, Koji; Hossain, Jaker; Harada, Daisuke; Ichikawa, Koki; Ishikawa, Ryo; Shirai, Hajime
    Solar Energy Materials and Solar Cells, Volume：181, First page：60, Last page：70, Jul. 2018
    North-Holland, Scientific journal
    DOI：https://doi.org/10.1016/j.solmat.2017.10.016
    DOI ID：10.1016/j.solmat.2017.10.016, ISSN：0927-0248, ORCID：50286555
  • Nb-doped amorphous titanium oxide compact layer for formamidinium-based high efficiency perovskite solar cells by low-temperature fabrication　　　　　　　　　　　　　　　
    Youhei Numata; Ryo Ishikawa; Yoshitaka Sanehira; Atsushi Kogo; Hajime Shirai; Tsutomu Miyasaka
    JOURNAL OF MATERIALS CHEMISTRY A, Volume：6, Number：20, First page：9583, Last page：9591, May 2018
    Low-temperature processed perovskite solar cells (PSCs) were prepared using an amorphous niobium-doped titanium oxide (Nb/TiOx) film as a compact layer (CL) combined with a brookite TiO2 mesoporous layer. Nb concentration of 4% in amorphous TiOx CL was found to improve the photocurrent-voltage performances of formamidinium (FA) and methylammonium (MA)-mixed perovskite, (FAPbI(3))(0.85)(MAPbBr(3))(0.15), and FA(0.85)Cs(0.15)PbI(3) perovskite solar cells, which were fabricated on 100 degrees C and 130 degrees C-annealed TiOx CLs; these solar cells exhibited conversion efficiencies up to 19.1% and 19.8%, respectively. The Nb/TiOx-based FA(0.85)Cs(0.15)PbI(3) perovskite cell obtained entirely by a low temperature process (130 degrees C or less) exhibited high stability against light soaking without encapsulation of the device.
    ROYAL SOC CHEMISTRY, English, Scientific journal
    DOI：https://doi.org/10.1039/c8ta02540a
    DOI ID：10.1039/c8ta02540a, ISSN：2050-7488, eISSN：2050-7496, ORCID：50286559, Web of Science ID：WOS:000433427300028
  • Barium hydroxide hole blocking layer for front-and back-organic/crystalline Si heterojunction solar cells
    Hossain, Jaker; Kasahara, Koji; Harada, Daisuke; Saiful Islam, ATM; Ishikawa, Ryo; Ueno, Keiji; Hanajiri, Tatsuro; Nakajima, Yoshikata; Fujii, Yasuhiko; Tokuda, Masahide; others
    Journal of Applied Physics, Volume：122, Number：5, First page：055101, Last page：055101, Aug. 2017
    AIP Publishing, Scientific journal
    DOI：https://doi.org/10.1063/1.4985812
    DOI ID：10.1063/1.4985812, ISSN：0021-8979, eISSN：1089-7550, ORCID：50286558
  • Fabrication of {CH(NH2)2}1−xCsxPbI3 Perovskite Thin Films by Two-step Method and Its Application to Thin Film Solar Cells
    Ryo Ishikawa; Keiji Ueno; Hajime Shirai
    Chemistry Letters, Volume：46, Number：4, First page：612, Last page：615, Apr. 2017, [Reviewed], [Lead, Corresponding]
    Oxford University Press (OUP), Scientific journal
    DOI：https://doi.org/10.1246/cl.161194
    DOI ID：10.1246/cl.161194, ISSN：0366-7022, eISSN：1348-0715, ORCID：50286551
  • Nafion-Modified PEDOT: PSS as a Transparent Hole-Transporting Layer for High-Performance Crystalline-Si/Organic Heterojunction Solar Cells with Improved Light Soaking Stability
    Hossain, Jaker; Liu, Qiming; Miura, Takuya; Kasahara, Koji; Harada, Daisuke; Ishikawa, Ryo; Ueno, Keiji; Shirai, Hajime
    ACS Applied Materials & Interfaces, Volume：8, Number：46, First page：31926, Last page：31934, Nov. 2016
    American Chemical Society, Scientific journal
    DOI：https://doi.org/10.1021/acsami.6b10272
    DOI ID：10.1021/acsami.6b10272, ISSN：1944-8244, eISSN：1944-8252, ORCID：50286544
  • Role of Isopropyl Alcohol Solvent in the Synthesis of Organic–Inorganic Halide CH(NH2)2PbIxBr3–x Perovskite Thin Films by a Two-Step Method　　　　　　　　　　　　　　　
    Takanori Yamanaka; Kenta Masumori; Ryo Ishikawa; Keiji Ueno; Hajime Shirai
    The Journal of Physical Chemistry C, Volume：120, Number：44, First page：25371, Last page：25377, Nov. 2016
    American Chemical Society (ACS), Scientific journal
    DOI：https://doi.org/10.1021/acs.jpcc.6b07527
    DOI ID：10.1021/acs.jpcc.6b07527, ISSN：1932-7447, eISSN：1932-7455, SCOPUS ID：84994884896, Web of Science ID：WOS:000387737900022
  • Effect of substrate bias on mist deposition of conjugated polymer on textured crystalline‐Si for efficient c‐Si/organic heterojunction solar cells
    Tatsuya Ohki; Koki Ichikawa; Jaker Hossain; Yasuhiko Fujii; Tatsuro Hanajiri; Ryo Ishikawa; Keiji Ueno; Hajime Shirai
    physica status solidi (a), Volume：213, Number：7, First page：1922, Last page：1925, Apr. 2016
    We investigated the chemical mist deposition (CMD) of poly(3,4‐ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) on textured crystalline silicon (c‐Si) substrate for efficient c‐Si/PEDOT:PSS heterojunction solar cells. The Mie scattering observation and differential mobility analysis characterization revealed that the average size of mist particle decreased from 330 to 30–40 nm with increasing the number density and traveling velocity of mist precursor when positive dc bias of 10 kV was applied to the c‐Si substrate. The uniform deposition of PEDOT:PSS films was performed on textured c‐Si with the increased adhesion by suitably adjusting Vs and substrate temperature. A power conversion efficiency (PCE) of 11.57% was obtained with Jsc of 36.1 mA cm−2, Voc of 0.49 V, and FF of 0.66, when a positive Vs of 10 kV was applied to c‐Si substrate. Furthermore, PCE increased to 12.5% with Jsc of 35.6 mA cm−2, Voc of 0.53 V, and FF of 0.67 by adding a 20‐nm‐thick AR coating layer of molybdenum oxide MoOx (refractive index, n = 2.1) fabricated by CMD using 12 molybdo(VI) phosphoric acid n‐hydrate [H3(PMo12O40) · nH2O] as a precursor. These findings imply that CMD using negatively charged mist precursor is a possible method for the uniform deposition of PEDOT:PSS on textured c‐Si substrate for efficient c‐Si/PEDOT:PSS heterojunction solar cells.
    Wiley, Scientific journal
    DOI：https://doi.org/10.1002/pssa.201532951
    DOI ID：10.1002/pssa.201532951, ISSN：1862-6300, eISSN：1862-6319
  • Highly Efficient Solution-Processed Poly (3, 4-ethylenedio-xythiophene): Poly (styrenesulfonate)/Crystalline--Silicon Heterojunction Solar Cells with Improved Light-Induced Stability
    Liu, Qiming; Ishikawa, Ryo; Funada, Shuji; Ohki, Tatsuya; Ueno, Keiji; Shirai, Hajime
    Advanced Energy Materials, Volume：5, Number：17, First page：1500744, Last page：1500744, Sep. 2015
    Wiley, Scientific journal
    DOI：https://doi.org/10.1002/aenm.201500744
    DOI ID：10.1002/aenm.201500744, ISSN：1614-6832, ORCID：50286550
  • Double resonance Raman modes in monolayer and few-layer MoTe 2
    Guo, Huaihong; Yang, Teng; Yamamoto, Mahito; Zhou, Lin; Ishikawa, Ryo; Ueno, Keiji; Tsukagoshi, Kazuhito; Zhang, Zhidong; Dresselhaus, Mildred S; Saito, Riichiro
    Physical Review B, Volume：91, Number：20, First page：205415, Last page：205415, May 2015
    American Physical Society, Scientific journal
    DOI：https://doi.org/10.1103/physrevb.91.205415
    DOI ID：10.1103/physrevb.91.205415, ISSN：1098-0121, eISSN：1550-235X, ORCID：50286542
  • Efficient organic/polycrystalline silicon hybrid solar cells　　　　　　　　　　　　　　　
    Liu, Qiming; Ohki, Tatsuya; Liu, Dequan; Sugawara, Hiromitsu; Ishikawa, Ryo; Ueno, Keiji; Shirai, Hajime
    Nano Energy, Volume：11, First page：260, Last page：266, Jan. 2015
    Elsevier, Scientific journal
    DOI：https://doi.org/10.1016/j.nanoen.2014.10.032
    DOI ID：10.1016/j.nanoen.2014.10.032, ISSN：2211-2855, ORCID：50286556
  • Improved photovoltaic response by incorporating green tea modified multiwalled carbon nanotubes in organic–inorganic hybrid solar cell
    Ishwor Khatri; Qiming Liu; Ryo Ishikawa; Keiji Ueno; Hajime Shirai
    Canadian Journal of Physics, Volume：92, Number：7/8, First page：849, Last page：852, Jul. 2014
    In this work, multiwalled carbon nanotubes (MWCNTs) are separated and cut into short pipes using a green tea solution and embedded at interface of poly(3,4-ethylenedioxythiophene):poly(stylenesulfonate) (PEDOT:PSS)/n-Si hybrid solar cells. Devices fabricated with embedding green tea modified MWCNTs show much better performance (10.02%) than that of a device without MWCNTs (9.2%) due to better hole transportation, easy exciton splitting, and suppression of charge recombination.
    Canadian Science Publishing, Scientific journal
    DOI：https://doi.org/10.1139/cjp-2013-0506
    DOI ID：10.1139/cjp-2013-0506, ISSN：0008-4204, eISSN：1208-6045
  • Self assembled silver nanowire mesh as top electrode for organic-inorganic hybrid solar cell　　　　　　　　　　　　　　　
    Ishwor Khatri; Qiming Liu; Ryo Ishikawa; Keiji Ueno; Hajime Shirai
    CANADIAN JOURNAL OF PHYSICS, Volume：92, Number：7-8, First page：867, Last page：870, Jul. 2014
    We prepare transparent, selfassembled polygonal silver nanowire (AgNW) mesh by bubble template and use as top electrode for a poly (3,4ethylenedioxythiophene):poly(stylenesulfonate) (PEDOT:PSS)/n-Si hybrid solar cell. Devices were fabricated by pressing the self-assembled AgNW and ITO electrodes onto the surface of the PEDOT: PSS and device performances were compared. In identical transmittances of ITO and self-assembled AgNW (i.e., 87% transmittance at wavelength of 550 nm), the self-assembled AgNW mesh electrodes shows lower sheet resistance (8 Omega/square) with enhanced transparency in the ultraviolet and infrared regions. As a result, a device performance with an efficiency of 9.60% was obtained with the self-assembled electrode compared to 9.07% efficiency from the indium-tin oxide (ITO) electrode under 100 mW/cm(2) of AM 1.5 illumination. This study suggests the potential application of a self-assembled AgNW electrode as the transparent conducting electrode for future optoelectronic devices.
    CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS, English, Scientific journal
    DOI：https://doi.org/10.1139/cjp-2013-0564
    DOI ID：10.1139/cjp-2013-0564, ISSN：0008-4204, eISSN：1208-6045, SCOPUS ID：84904317577, Web of Science ID：WOS:000339379500068
  • Self-assembled silver nanowires as top electrode for poly(3,4-ethylenedioxythiophene): poly(stylenesulfonate)/n-silicon solar cell　　　　　　　　　　　　　　　
    Ishwor Khatri; Ayo Hoshino; Fumiya Watanabe; Qiming Liu; Ryo Ishikawa; Keiji Ueno; Hajime Shirai
    THIN SOLID FILMS, Volume：558, First page：306, Last page：310, May 2014
    We prepare transparent, self-assembled polygonal silver nanowire (AgNW) mesh by bubble template and transferred as top electrode in poly(3,4-ethylenedioxythiophene): poly(stylenesulfonate) (PEDOT:PSS)/n-silicon hybrid solar cell, which shows power conversion efficiency of 10.62% under 100 mW/cm(2) of AM 1.5G illuminations. The self-assembled AgNW mesh electrode exhibited a low sheet resistance (50 Omega/square) with high transmittance (87%) at a wavelength of 550 nm. In self-assembled AgNW mesh, AgNWs are well packed making continuous path for charge collection and transportation. Nevertheless, studies have also been carried out to transfer AgNWs from donor (glass or plastic) to receiver substrates (thermal release tape) and an expected reason for the transfer of AgNWs from thermal release tape to the top of PEDOT: PSS has also been proposed. (C) 2014 Elsevier B. V. All rights reserved.
    ELSEVIER SCIENCE SA, English, Scientific journal
    DOI：https://doi.org/10.1016/j.tsf.2014.02.073
    DOI ID：10.1016/j.tsf.2014.02.073, ISSN：0040-6090, SCOPUS ID：84898785080, Web of Science ID：WOS:000334314100047
  • Real-time measurement of optical anisotropy during film growth using a chemical mist deposition of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)
    T. Hiate; N. Miyauchi; Q. Liu; R. Ishikawa; K. Ueno; H. Shirai
    Journal of Applied Physics, Volume：115, Number：12, Mar. 2014
    Real-time monitoring of optical anisotropy during growth by the chemical mist deposition of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films was carried out using spectroscopic ellipsometry. The microstructure of the grown films was found to be primarily determined by the DC bias applied to the mesh electrode. The ellipsometry results revealed that uniaxial anisotropy appeared for film thicknesses of about 5 nm and above, which corresponds to the average size of PEDOT crystallites. The extraordinary refractive index was found to be strongly correlated with the carrier mobility. Both the degree of optical anisotropy and the carrier mobility could be controlled during film growth by adjusting the DC bias.
    AIP Publishing, Scientific journal
    DOI：https://doi.org/10.1063/1.4869956
    DOI ID：10.1063/1.4869956, ISSN：0021-8979, eISSN：1089-7550
  • Improved photovoltaic performance of crystalline-Si/organic Schottky junction solar cells using ferroelectric polymers
    Liu, Q; Khatri, I; Ishikawa, R; Fujimori, A; Ueno, K; Manabe, K; Nishino, H; Shirai, H
    Applied Physics Letters, Volume：103, Number：16, First page：163503, Last page：163503, Oct. 2013
    AIP Publishing, Scientific journal
    DOI：https://doi.org/10.1063/1.4826323
    DOI ID：10.1063/1.4826323, ISSN：0003-6951, eISSN：1077-3118, ORCID：50286534
  • Effects of molybdenum oxide molecular doping on the chemical structure of poly (3, 4-ethylenedioxythiophene): poly (stylenesulfonate) and on carrier collection efficiency of silicon/poly (3, 4-ethylenedioxythiophene): poly (stylenesulfonate) heterojunction solar cells
    Liu, Qiming; Khatri, Ishwor; Ishikawa, Ryo; Ueno, Keiji; Shirai, Hajime
    Applied Physics Letters, Volume：102, Number：18, First page：183503, Last page：183503, May 2013
    AIP Publishing, Scientific journal
    DOI：https://doi.org/10.1063/1.4804298
    DOI ID：10.1063/1.4804298, ISSN：0003-6951, eISSN：1077-3118, ORCID：50286532
  • Green-tea modified multiwalled carbon nanotubes for efficient poly(3,4-ethylenedioxythiophene):poly(stylenesulfonate)/n-silicon hybrid solar cell
    Ishwor Khatri; Zeguo Tang; Qiming Liu; Ryo Ishikawa; Keiji Ueno; Hajime Shirai
    Applied Physics Letters, Volume：102, Number：6, Feb. 2013
    Poly(3,4-ethylenedioxythiophene):poly(stylenesulfonate) (PEDOT:PSS)/n-Si hybrid solar cells were studied with and without embedding green-tea modify multiwalled carbon nanotubes (MWCNTs) at interface. Devices fabricated with embedding green-tea modified MWCNTs show much better performance than that of a device without MWCNTs with short circuit current density (Jsc), open circuit voltage (Voc), fill factor, and power conversion efficiency (η) as 30.31 mA/cm2, 0.54 V, 0.66, and 10.93%, respectively. Here, we believe that green-tea disperse MWCNTs bundles to individual and its incorporation improved built-in potential (Vb) of the device for better hole transport, easy exciton splitting, and suppression of charge recombination, thereby improving photovoltaic response.
    AIP Publishing, Scientific journal
    DOI：https://doi.org/10.1063/1.4792691
    DOI ID：10.1063/1.4792691, ISSN：0003-6951, eISSN：1077-3118
  • Efficient Organic Photovoltaic Cells Using MoO3 Hole-Transporting Layers Prepared by Simple Spin-Cast of Its Dispersion Solution in Methanol　　　　　　　　　　　　　　　
    Mayuko Kishi; Yosuke Kubo; Ryo Ishikawa; Hajime Shirai; Keiji Ueno
    JAPANESE JOURNAL OF APPLIED PHYSICS, Volume：52, Number：2, Feb. 2013
    MoO3 is one of the efficient hole-transporting materials for organic photovoltaic cells (OPVs). Here, a facile method of preparing the MoO3 buffer layer will be introduced. MoO3 powder was added into methanol and ultrasonication of the dispersion solution was carried out. Then the solution was centrifuged, and the supernatant was spin-cast on an indium-tin-oxide anode. On it, a photoconversion layer was prepared by spin-casting a poly(3-hexylthiophene):[6,6]-phenyl-C-61 butyric acid methyl ester (P3HT:PCBM) composite solution. The fabricated OPVs revealed an efficiency as high as 3.05%, which is better than that of P3HT:PCBM OPV with a poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) hole-transporting layer. (C) 2013 The Japan Society of Applied Physics
    JAPAN SOC APPLIED PHYSICS, English, Scientific journal
    DOI：https://doi.org/10.7567/JJAP.52.020202
    DOI ID：10.7567/JJAP.52.020202, ISSN：0021-4922, CiNii Articles ID：40019589711, CiNii Books ID：AA12295836, ORCID：50286552, Web of Science ID：WOS:000314466800002
  • Chemical mist deposition of graphene oxide and PEDOT:PSS films for crystalline Si/organic heterojunction solar cells
    Ishwor Khatri; Takashi Imamura; Akira Uehara; Ryo Ishikawa; Keiji Ueno; Hajime Shirai
    physica status solidi c, Volume：9, Number：10-11, First page：2134, Last page：2137, Sep. 2012
    Abstract

    The chemical mist deposition of graphene oxide (GO) and poly(3,4‐ethylenedioxythiophene):poly(stylenesulfonate) (PEDOT:PSS) were investigated on the crystalline silicon (c‐Si) substrate for the n‐type c‐Si/organic heterojunction solar cells. The uniform coating of GO flake with an average size of 1‐5 μm was obtained on the hydrophobic c‐Si wafer using deionized water as a solvent. The GO layer thickness could be controlled from a monolayer to a few tens of nanometres by vary‐ ing mist deposition time. The c‐Si/GO/ PEDOT:PSS heterojunction solar cells shows the efficiency improved from 8.75 to 9.27% with insertion of GO flakes a the PEDOT:PSS and c‐Si interface owing to the enhanced suppression of electron recombination and/or promotion of hole current at the anode. Furthermore, the CMD was also applied to coat conductive PEDOT:PSS films on the textured c‐Si. The η of 7.75% was obtained with a short‐circuit current of 34.22 mA/cm2, a open‐circuit voltage of 0.46 V, and a fill factor of 0.48. These findings imply that CMD is a promising method for the uniform deposition of both nanomaterials (GO) and conjugated polymer for the c‐Si/ organic heterojunction solar cells (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
    Wiley, Scientific journal
    DOI：https://doi.org/10.1002/pssc.201200132
    DOI ID：10.1002/pssc.201200132, ISSN：1862-6351, eISSN：1610-1642
  • Electrospray Deposition of Poly(3-hexylthiophene) Films for Crystalline Silicon/Organic Hybrid Junction Solar Cells　　　　　　　　　　　　　　　
    Tomohisa Ino; Masahiro Ono; Naoto Miyauchi; Qiming Liu; Zeguo Tang; Ryo Ishikawa; Keiji Ueno; Hajime Shirai
    Japanese Journal of Applied Physics, Volume：51, Number：6R, First page：061602, Last page：061602, Jun. 2012
    The electrospray deposition (ESD) of poly(3-hexylthiophene) (P3HT) films for use in crystalline silicon/organic hybrid heterojunction solar cells on a crystalline silicon (c-Si) wafer was investigated using real-time characterization by spectroscopic ellipsometry (SE). In contrast to the nonuniform deposition of products frequently obtained by spin-coating, a uniform deposition of P3HT films was achieved on flat and textured hydrophobic c-Si wafers by adjusting the deposition conditions. Similar findings were also obtained for the deposition of conductive poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) on P3HT. The c-Si/P3HT/PEDOT:PSS heterojunction solar cells exhibited efficiencies of 4.1 and 6.3% on flat and textured c-Si wafers, respectively. These findings suggest that ESD is a promising method for the uniform deposition of P3HT and PEDOT:PSS films on flat and textured hydrophobic substrates.
    IOP Publishing, Scientific journal
    DOI：https://doi.org/10.1143/jjap.51.061602
    DOI ID：10.1143/jjap.51.061602, ISSN：0021-4922, eISSN：1347-4065, SCOPUS ID：84863329516, Web of Science ID：WOS:000305135200010
  • Efficient Crystalline Si/Poly (ethylene dioxythiophene): Poly (styrene sulfonate): Graphene Oxide Composite Heterojunction Solar Cells　　　　　　　　　　　　　　　
    Ono, Masahiro; Tang, Zeguo; Ishikawa, Ryo; Gotou, Takuya; Ueno, Keiji; Shirai, Hajime
    Applied Physics Express, Volume：5, Number：3, First page：032301, Last page：032301, Feb. 2012
    IOP Publishing, Scientific journal
    DOI：https://doi.org/10.1143/apex.5.032301
    DOI ID：10.1143/apex.5.032301, ISSN：1882-0778, eISSN：1882-0786, CiNii Articles ID：10030511172, CiNii Books ID：AA12295133, ORCID：50286539
  • Electrospray-Deposited Poly (3, 4-ethylenedioxythiophene): Poly (styrene sulfonate) for Poly (3-hexylthiophene): Phenyl-C61-Butyric Acid Methyl Ester Photovoltaic Cells　　　　　　　　　　　　　　　
    Hiate, Taiga; Ino, Tomohisa; Ishikawa, Ryo; Ueno, Keiji; Shirai, Hajime
    Japanese Journal of Applied Physics, Volume：51, Number：10S, 2012
    IOP Publishing, Scientific journal
    ORCID：50286545
  • Crystalline Silicon/Graphene Oxide Hybrid Junction Solar Cells　　　　　　　　　　　　　　　
    Liu, Qiming; Wanatabe, Fumiya; Hoshino, Aya; Ishikawa, Ryo; Gotou, Takuya; Ueno, Keiji; Shirai, Hajime
    Japanese Journal of Applied Physics, Volume：51, Number：10S, 2012
    IOP Publishing, Scientific journal
    ORCID：50286538
  • Increased Organic Photovoltaic Cell Efficiency by Incorporating a Nonionic Fluorinated Surfactant Cathode Interlayer　　　　　　　　　　　　　　　
    Ishikawa, Ryo; Shirai, Hajime; Ueno, Keiji
    Applied Physics Express, Volume：5, Number：12, First page：121601, Last page：121601, 2012
    IOP Publishing, English, Scientific journal
    ISSN：1882-0778, CiNii Articles ID：10031140406, CiNii Books ID：AA12295133, ORCID：50286536
  • Highly efficient crystalline silicon/Zonyl fluorosurfactant-treated organic heterojunction solar cells　　　　　　　　　　　　　　　
    Liu, Qiming; Ono, Masahiro; Tang, Zeguo; Ishikawa, Ryo; Ueno, Keiji; Shirai, Hajime
    Applied Physics Letters, Volume：100, Number：18, First page：183901, Last page：183901, 2012
    AIP Publishing, Scientific journal
    ORCID：50286530
  • Efficient Organic Photovoltaic Cells Using Hole-Transporting MoO3 Buffer Layers Converted from Solution-Processed MoS2 Films　　　　　　　　　　　　　　　
    Shogo Kato; Ryo Ishikawa; Yosuke Kubo; Hajime Shirai; Keiji Ueno
    Japanese Journal of Applied Physics, Volume：50, Number：7R, First page：071604, Last page：071604, Jul. 2011
    We introduce a new method to fabricate a MoO3 hole-transporting layer for organic photovoltaic cells (OPVs). We fabricated a MoS2 film from its solution and converted it to MoO3. MoS2 has a lamellar crystal structure similar to graphite, and it can be exfoliated into monolayer MoS2 dispersible in water. Li atoms were first intercalated into van der Waals gaps of MoS2, and the compound was immersed in water to generate H2 bubbles, which broke the van der Waals bond between adjacent MoS2 layers. The produced solution of MoS2 was spin-casted on an indium tin oxide substrate, and the film was oxidized by ozone. On the converted MoO3 hole-transporting layer, an organic photoconversion layer was fabricated by spin-casting a poly(3-hexylthiophene):[6,6]-phenyl-C61 butyric acid methyl ester (P3HT:PCBM) composite solution. Fabricated OPVs revealed a power conversion efficiency as large as 3.14%, which was superior to that of P3HT/PCBM OPV with a poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) hole-transporting layer.
    IOP Publishing, Scientific journal
    DOI：https://doi.org/10.1143/jjap.50.071604
    DOI ID：10.1143/jjap.50.071604, ISSN：0021-4922, eISSN：1347-4065, CiNii Articles ID：40018915963, CiNii Books ID：AA12295836, ORCID：50286533
■ MISC
  • 自己組織化を活用したペロブスカイト太陽電池の高性能化—ペロブスカイト太陽電池の最新材料開発と製膜技術　　　　　　　　　　　　　　　
    石川 良
    Volume：24, Number：6, First page：54, Last page：61, Sep. 2024
    Japanese
    ISSN：1346-3926, CiNii Books ID：AA1267241X
  • Improved Efficiency of Perovskite Solar Cells by adding fluorophenyl phosphine　　　　　　　　　　　　　　　
    Ishikawa Ryo; Ueno keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2021.2, First page：2312, Last page：2312, 26 Aug. 2021
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2021.2.0_2312
    DOI ID：10.11470/jsapmeeting.2021.2.0_2312, eISSN：2436-7613
  • Improvement of FA0.9Cs0.1Pb(I0.65Br0.35)3 thin film for the fabrication of tandem solar cells　　　　　　　　　　　　　　　
    Shimomura Kazushi; Ishikawa Ryo; Ueno Keiji; Hajime Shirai
    JSAP Annual Meetings Extended Abstracts, Volume：2021.1, First page：2118, Last page：2118, 26 Feb. 2021
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2021.1.0_2118
    DOI ID：10.11470/jsapmeeting.2021.1.0_2118, eISSN：2436-7613
  • Synthesis and characterization of SnO2 nanoparticle solutions for perovskite n-Si/PEDOT:PSS tandem solar cells　　　　　　　　　　　　　　　
    Nasuno Yuki; Ishikawa Ryo; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2021.1, First page：2127, Last page：2127, 26 Feb. 2021
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2021.1.0_2127
    DOI ID：10.11470/jsapmeeting.2021.1.0_2127, eISSN：2436-7613
  • Molecular weight dependence of tetrafluorophenyl borate added polyallylamine and its application to Perovskite Solar Cells　　　　　　　　　　　　　　　
    Ukai Ryuichi; Shirai Hajime; Ishikawa Ryo
    JSAP Annual Meetings Extended Abstracts, Volume：2021.1, First page：2117, Last page：2117, 26 Feb. 2021
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2021.1.0_2117
    DOI ID：10.11470/jsapmeeting.2021.1.0_2117, eISSN：2436-7613
  • Fabrication of ultra-thin TiOx layer by solution process and its application to hole blocking layer of PEDOT: PSS/n-Si solar cell　　　　　　　　　　　　　　　
    Nasuno Yuki; Karim Enamul; Kurosu Shunji; Ukai Tomofumi; Tokuda Masahide; Yasuhiko Fujii; Hanajiri Tatsurou; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2020.1, First page：3285, Last page：3285, 28 Feb. 2020
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2020.1.0_3285
    DOI ID：10.11470/jsapmeeting.2020.1.0_3285, eISSN：2436-7613
  • Investigation of Surface passivation effects by Fluorinated Polymer in FA0.8Cs0.2PbI3 thin film and photovoltaic cells　　　　　　　　　　　　　　　
    Moriya Yuma; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2020.1, First page：2414, Last page：2414, 28 Feb. 2020
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2020.1.0_2414
    DOI ID：10.11470/jsapmeeting.2020.1.0_2414, eISSN：2436-7613
  • Fabrication and characterization of FA1-xCsxPb(I0.65Br0.35)3Perovskite thin films　　　　　　　　　　　　　　　
    Kazushi Shimomura; Ryo Ishikawa; Hajime Shirai
    JSAP Annual Meetings Extended Abstracts, Volume：2020.1, First page：2418, Last page：2418, 28 Feb. 2020
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2020.1.0_2418
    DOI ID：10.11470/jsapmeeting.2020.1.0_2418, eISSN：2436-7613
  • Role of water additive in the synthesis of AlOx by mist-CVD　　　　　　　　　　　　　　　
    Rajib Arifuzzaman Rajib; Kuroki Takanori; Imai Koki; Kurosu Shunji; Ukai Tomofumi; Fujii Yasuhiko; Tokuda Masahide; Hanajiri Tatsuro; Ishikawa Ryo; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2019.2, First page：3965, Last page：3965, 04 Sep. 2019
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2019.2.0_3965
    DOI ID：10.11470/jsapmeeting.2019.2.0_3965, eISSN：2436-7613
  • PEDOT:PSS mist transport into Si nanopillar using Nafion as a mediator　　　　　　　　　　　　　　　
    Rajib Arifuzzaman Rajib; Kuroki Takanori; Kurosu Shunji; Ukai Tomofumi; Fujii Yasuhiko; Tokuda Masahide; Hanajiri Tatsuro; Ishikawa Ryo; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2019.2, First page：3967, Last page：3967, 04 Sep. 2019
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2019.2.0_3967
    DOI ID：10.11470/jsapmeeting.2019.2.0_3967, eISSN：2436-7613
  • Role of TSC additive in the grain growth of perovskite phase　　　　　　　　　　　　　　　
    Kawamura Koki; Wasai Yoko; Nabatova-Gabain Nataliya; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2019.2, First page：2733, Last page：2733, 04 Sep. 2019
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2019.2.0_2733
    DOI ID：10.11470/jsapmeeting.2019.2.0_2733, eISSN：2436-7613
  • Fabrication and characterization of Perovskite photovoltaic cells with low temperature processed Carbon Electrode　　　　　　　　　　　　　　　
    Moriya Yuma; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2019.2, First page：2703, Last page：2703, 04 Sep. 2019
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2019.2.0_2703
    DOI ID：10.11470/jsapmeeting.2019.2.0_2703, eISSN：2436-7613
  • Fabrication and characterization of highly oriented and durable two-dimensional (4F-PEA)2PbI4 incorporating perovskite thin films　　　　　　　　　　　　　　　
    Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2019.2, First page：2704, Last page：2704, 04 Sep. 2019
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2019.2.0_2704
    DOI ID：10.11470/jsapmeeting.2019.2.0_2704, eISSN：2436-7613
  • Carrier transport in PEDOT:PSS/n-Si heterojunction solar cells　　　　　　　　　　　　　　　
    SHIRAI Hajime; ISLAM A.T.M. Saiful; ISHIKAWA Ryo
    Oyo Buturi, Volume：88, Number：5, First page：351, Last page：355, 10 May 2019
    We have investigated solution-processed n-type silicon (n-Si) heterojunction solar cells with a transparent hole-conducting polymer PEDOT:PSS. PEDOT:PSS/n-Si solar cells showed a power conversion efficiency (PCE) of 13〜14% (11〜12%) for a 2×2 cm2 (4 inch) size device. Solar cell modules consisting of ten units of series-connected 2×2 cm2 (4 inch) sized cells, exhibited an output power of 0.37W (7.3W). The junction property at the PEDOT:PSS/n-Si interface was also monitored for varying donor concentrations of n-Si using the current-voltage, capacitance-voltage, Kelvin-probe, and the photoemission yield characterizations. The carrier transport at the PEDOT:PSS/n-Si heterojunction is mainly determined by the diffusion of the minority carrier, which suggests that the PEDOT:PSS/n-Si junction forms a p+n-junction.
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/oubutsu.88.5_351
    DOI ID：10.11470/oubutsu.88.5_351, ISSN：0369-8009, eISSN：2188-2290, CiNii Articles ID：130007709507, CiNii Books ID：AN00026679
  • Diagnostics of charged mist transport using a triode electrode configuration　　　　　　　　　　　　　　　
    Kuroki Takanori; Imai Kouki; Harada Daisuke; Kurosu Syunji; Nakajima Yoshikata; Fujii Yasuhiko; Tokuda Masahide; Hanajiri Tatsurou; Ishikawa Ryou; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2019.1, First page：1405, Last page：1405, 25 Feb. 2019
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2019.1.0_1405
    DOI ID：10.11470/jsapmeeting.2019.1.0_1405, eISSN：2436-7613
  • High-temperature stable Rb-doped perovskite solar cells　　　　　　　　　　　　　　　
    Numata Youhei; Sanehira Yoshitaka; Ishikawa Ryo; Shira Hajime; Miyasaka Tsutomu
    JSAP Annual Meetings Extended Abstracts, Volume：2019.1, First page：2417, Last page：2417, 25 Feb. 2019
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2019.1.0_2417
    DOI ID：10.11470/jsapmeeting.2019.1.0_2417, eISSN：2436-7613
  • Fabrication and characterization of Fluorinated polymer combined Perovskite photovoltaic cells.　　　　　　　　　　　　　　　
    Moriya Yuma; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2019.1, First page：2414, Last page：2414, 25 Feb. 2019
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2019.1.0_2414
    DOI ID：10.11470/jsapmeeting.2019.1.0_2414, eISSN：2436-7613
  • Ellipsometry study of crystalline-Si/perovskite tandem structure solar cells　　　　　　　　　　　　　　　
    Kawamura Koki; Nasuno Yuki; Ishikawa Ryo; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2019.1, First page：2648, Last page：2648, 25 Feb. 2019
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2019.1.0_2648
    DOI ID：10.11470/jsapmeeting.2019.1.0_2648, eISSN：2436-7613
  • Fabrication of FA0.76Cs0.19PEA0.05PbI3 thin films and its application to thin-film solar cells　　　　　　　　　　　　　　　
    Takahashi Kotaro; Ishikawa Ryo; Shirai Hazime
    JSAP Annual Meetings Extended Abstracts, Volume：2019.1, First page：2450, Last page：2450, 25 Feb. 2019
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2019.1.0_2450
    DOI ID：10.11470/jsapmeeting.2019.1.0_2450, eISSN：2436-7613
  • Improved Efficiency of Perovskite Solar Cells by fluorinated amine treatment　　　　　　　　　　　　　　　
    Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2019.1, First page：2413, Last page：2413, 25 Feb. 2019
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2019.1.0_2413
    DOI ID：10.11470/jsapmeeting.2019.1.0_2413, eISSN：2436-7613
  • Fabrication and characterization of Ba1-xLaxSnO3 prepared by peroxide precipitate method　　　　　　　　　　　　　　　
    Ishikawa Koki; Ishikawa Ryo; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2019.1, First page：2415, Last page：2415, 25 Feb. 2019
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2019.1.0_2415
    DOI ID：10.11470/jsapmeeting.2019.1.0_2415, eISSN：2436-7613
  • Fabrication and characterization of Kx(FA0.8Cs0.2)1-xPbI3 thin films by one step method using additive　　　　　　　　　　　　　　　
    Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2018.2, First page：2552, Last page：2552, 05 Sep. 2018
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2018.2.0_2552
    DOI ID：10.11470/jsapmeeting.2018.2.0_2552, eISSN：2436-7613
  • N-Si/PEDOT:PSS HOT Solar Cells with bar-coated AgNW and PEDOT:PSS by bar coat　　　　　　　　　　　　　　　
    Harada Daisuke; Kasahara Koji; Islam A.T.M.S.; Ishikawa Ryo; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2018.1, First page：2726, Last page：2726, 05 Mar. 2018
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2018.1.0_2726
    DOI ID：10.11470/jsapmeeting.2018.1.0_2726, eISSN：2436-7613
  • Fabrication and characterization of Fluorinated polymer combined FA0.8Cs0.2PbI3 thin films　　　　　　　　　　　　　　　
    Akiyama Shuhei; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2018.1, First page：2786, Last page：2786, 05 Mar. 2018
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2018.1.0_2786
    DOI ID：10.11470/jsapmeeting.2018.1.0_2786, eISSN：2436-7613
  • Perovskite photovoltaic cells with bilayer electron-transporting layers of titanium oxide and tin oxide　　　　　　　　　　　　　　　
    Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2018.1, First page：2752, Last page：2752, 05 Mar. 2018
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2018.1.0_2752
    DOI ID：10.11470/jsapmeeting.2018.1.0_2752, eISSN：2436-7613
  • Diagnostics of mist transport and sticking processes using diode and triode electrode structures　　　　　　　　　　　　　　　
    Kuroki Takanori; Ryo Ishikawa; Hajime Shirai
    JSAP Annual Meetings Extended Abstracts, Volume：2018.1, First page：1643, Last page：1643, 05 Mar. 2018
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2018.1.0_1643
    DOI ID：10.11470/jsapmeeting.2018.1.0_1643, eISSN：2436-7613
  • Optical Anisotropy and Compositional Ratio of Conductive Polymer PEDOT:PSS and Their Effect on Photovoltaic Performance of Crystalline Silicon/Organic Heterojunction Solar Cells
    Hajime Shirai; Qiming Liu; Tatsuya Ohki; Ryo Ishikawa; Keiji Ueno
    Advances in Silicon Solar Cells, First page：137, Last page：159, 12 Jan. 2018
    Springer International Publishing
    DOI：https://doi.org/10.1007/978-3-319-69703-1_5
    DOI ID：10.1007/978-3-319-69703-1_5
  • 若手研究者の挑戦(第23回)塗布型有機無機ハイブリッドペロブスカイト太陽電池の研究—Development of Organic-inorganic hybrid perovskite thin film solar cells fabricated by solution process　　　　　　　　　　　　　　　
    石川 良
    Volume：36, Number：11, First page：148, Last page：153, Nov. 2017
    Japanese
    ISSN：0286-9659, CiNii Articles ID：40021384729, CiNii Books ID：AN00360965
  • Efficient hole blocking capability of Mg(OH)2 for n-Si/PEDOT:PSS junction solar cells　　　　　　　　　　　　　　　
    Kasahara Koji; Islam A.T.M Saiful; Hossain Jaker; Harada Daisuke; Kawamura Kouki; Ishikawa Ryo; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2017.2, First page：3622, Last page：3622, 25 Aug. 2017
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2017.2.0_3622
    DOI ID：10.11470/jsapmeeting.2017.2.0_3622, eISSN：2436-7613
  • Fine structure of CsPbI2 dependent Cs0.2FA0.8PbIxBr3-x perovskite by two-step reaction　　　　　　　　　　　　　　　
    Miura Takuya; Takahashi Kotaro; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2017.2, First page：2576, Last page：2576, 25 Aug. 2017
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2017.2.0_2576
    DOI ID：10.11470/jsapmeeting.2017.2.0_2576, eISSN：2436-7613
  • Fabrication and characterization of FA1-xCsxPbI3 thin films by one step method using additive (2)　　　　　　　　　　　　　　　
    Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2017.2, First page：2665, Last page：2665, 25 Aug. 2017
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2017.2.0_2665
    DOI ID：10.11470/jsapmeeting.2017.2.0_2665, eISSN：2436-7613
  • Diagnostic of Nafion mist transport and Si passivation by CMD Nafion　　　　　　　　　　　　　　　
    Kuroki Takanori; Hossain Jaker; Ishikawa Ryo; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2017.2, First page：3624, Last page：3624, 25 Aug. 2017
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2017.2.0_3624
    DOI ID：10.11470/jsapmeeting.2017.2.0_3624, eISSN：2436-7613
  • N-Si/PEDOT:PSS HOT Solar Cells with bar-coated AgNW and PEDOT:PSS　　　　　　　　　　　　　　　
    Harada Daisuke; Ishikawa Ryo; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2017.2, First page：3623, Last page：3623, 25 Aug. 2017
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2017.2.0_3623
    DOI ID：10.11470/jsapmeeting.2017.2.0_3623, eISSN：2436-7613
  • Effect of Ba(OH)2 interlayer on PV performance of c-Si/PEDOT:PSS (HOT) solar cells　　　　　　　　　　　　　　　
    Hossain Jaker; Kasahara Koji; Ichikawa Koki; Harada Daisuke; Liu Qiming; Ishikawa Ryoma; Hanajiri Tatsuro; Nakajima Yoshikata; Fujii Yasuhiko; Tokuda Masahide; Ishikawa Ryo; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2017.1, First page：3699, Last page：3699, 01 Mar. 2017
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2017.1.0_3699
    DOI ID：10.11470/jsapmeeting.2017.1.0_3699, eISSN：2436-7613
  • Chemical mist deposition of PEDOT:PSS and its application to c-Si/PEDOT:PSS solar cells　　　　　　　　　　　　　　　
    Kuroki Takanori; Jiale Dou; Ryoma Ishikawa; Hossain Jaker; Islam A.T.M Saiful; Tatsuro Hanajiri; Yoshikata Nakajima; Yasuhiko Fujii; Masahide Tokuda; Ryo Ishikawa; Hajime Shirai
    JSAP Annual Meetings Extended Abstracts, Volume：2017.1, First page：3668, Last page：3668, 01 Mar. 2017
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2017.1.0_3668
    DOI ID：10.11470/jsapmeeting.2017.1.0_3668, eISSN：2436-7613
  • Fabrication of PEDOT:PSS/c-Si junction solar cells using bar coat method　　　　　　　　　　　　　　　
    Harada Daisuke; Kasahara Koji; Ichikawa Koki; Hayashi Tsutomu; Ishikawa Ryo; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2017.1, First page：3669, Last page：3669, 01 Mar. 2017
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2017.1.0_3669
    DOI ID：10.11470/jsapmeeting.2017.1.0_3669, eISSN：2436-7613
  • Fabrication of c-Si/PEDOT:PSS(HOT) hybrid solar cell module　　　　　　　　　　　　　　　
    Kasahara Koji; Harada Daisuke; Ichikawa Koki; Ishikawa Ryo; Hayashi Tsutomu; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2017.1, First page：2625, Last page：2625, 01 Mar. 2017
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2017.1.0_2625
    DOI ID：10.11470/jsapmeeting.2017.1.0_2625, eISSN：2436-7613
  • High-performance organic-inorganic heterojunction solar cells with thin layered material additives　　　　　　　　　　　　　　　
    Kimura Takahiro; Ishikawa Ryo; Shirai Hajime; Ueno Keiji
    JSAP Annual Meetings Extended Abstracts, Volume：2017.1, First page：2664, Last page：2664, 01 Mar. 2017
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2017.1.0_2664
    DOI ID：10.11470/jsapmeeting.2017.1.0_2664, eISSN：2436-7613
  • C-Si/CsFAPbIxBr3-x perovskite multijunction solar cells　　　　　　　　　　　　　　　
    Shirai Hajime; Masumori Kenta; Miura Takutya; Ishikawa Ryo
    JSAP Annual Meetings Extended Abstracts, Volume：2017.1, First page：2701, Last page：2701, 01 Mar. 2017
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2017.1.0_2701
    DOI ID：10.11470/jsapmeeting.2017.1.0_2701, eISSN：2436-7613
  • Solution-processed Back-contact PEDOT:PSS/c-Si Heterojunction Solar Cells　　　　　　　　　　　　　　　
    Shirai Hajime; Liu Qiming; Hossain Jaker; Islam A.T.M. Saiful; Ishikawa Ryo
    JSAP Annual Meetings Extended Abstracts, Volume：2017.1, First page：3700, Last page：3700, 01 Mar. 2017
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2017.1.0_3700
    DOI ID：10.11470/jsapmeeting.2017.1.0_3700, eISSN：2436-7613
  • 若手研究者の紹介 有機・無機ハイブリットペロブスカイト薄膜太陽電池の研究　　　　　　　　　　　　　　　
    石川 良
    Volume：8, First page：14, Last page：17, 2017
    type:text
    The pore-free and compact FA0.8Cs0.2PbI3 organic-inorganic perovskite films were fabricated by a two-step method using reaction of a porous PbI2-(CsI)0.2 thin film with FAI 2-propanol solution. The thin films were characterized by XRD, UV-Vis absorption, FESEM, and AFM. The thin films were applied in planar structure solar cells, giving a maximum PCE of 14.7% with VOC of 1.02 V, JSC of 21.4 mA cm-2, and FF of 67.5 % in reverse scan. Further, uniform surfaces with minimal roughness FA0.8Cs0.2PbI3 thin films by one-step method using 1-Cyclohexyl-2-pyrrolidone having a high boiling point and a low vapor pressure as additive.
    Japanese
    DOI：https://doi.org/10.24561/00017999
    DOI ID：10.24561/00017999, CiNii Articles ID：120006407133, CiNii Books ID：AA12504266
  • Nafion-Modified PEDOT:PSS/c-Si Solar Cells　　　　　　　　　　　　　　　
    Liu Qiming; Hossain Jaker; Miura Takuya; Harada Daisuke; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2016.2, First page：3397, Last page：3397, 01 Sep. 2016
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2016.2.0_3397
    DOI ID：10.11470/jsapmeeting.2016.2.0_3397, eISSN：2436-7613
  • c-Si/PEDOT:PSS heterojunction solar cells　　　　　　　　　　　　　　　
    Shirai Hajime; Liu Qiming; Hayashi Tsutomu; Ishikawa Ryo; Ueno Keiji
    JSAP Annual Meetings Extended Abstracts, Volume：2016.2, First page：258, Last page：258, 01 Sep. 2016
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2016.2.0_258
    DOI ID：10.11470/jsapmeeting.2016.2.0_258, eISSN：2436-7613
  • Fabrication and characterization of FA1-xCsxPbI3 thin films using two step method　　　　　　　　　　　　　　　
    Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2016.2, First page：2491, Last page：2491, 01 Sep. 2016
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2016.2.0_2491
    DOI ID：10.11470/jsapmeeting.2016.2.0_2491, eISSN：2436-7613
  • Deposition process of PEDOT:PSS on c-Si by Chemical Mist Deposition　　　　　　　　　　　　　　　
    Ichikawa Koki; Ohki Tatsuya; Hossain Jaker; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2016.1, First page：3710, Last page：3710, 03 Mar. 2016
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2016.1.0_3710
    DOI ID：10.11470/jsapmeeting.2016.1.0_3710, eISSN：2436-7613
  • Role of IPA in the formation of FAPbIxBr3-x perovskite thin films　　　　　　　　　　　　　　　
    Shirai Hajime; Yamanaka Takanori; Funada Shuji; Uchiumi Kazuma; Usuba Kohei; Ishiakwa Ryo
    JSAP Annual Meetings Extended Abstracts, Volume：2016.1, First page：2545, Last page：2545, 03 Mar. 2016
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2016.1.0_2545
    DOI ID：10.11470/jsapmeeting.2016.1.0_2545, eISSN：2436-7613
  • Plasma CVD of a-SiOH as AR coating layer for c-Si/PEDOT:PSS solar cells　　　　　　　　　　　　　　　
    Kasahara Koji; Hossain Jaker; Liu Qiming; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2016.1, First page：3711, Last page：3711, 03 Mar. 2016
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2016.1.0_3711
    DOI ID：10.11470/jsapmeeting.2016.1.0_3711, eISSN：2436-7613
  • Fabrication of back-contact c-Si/PEDOT:PSS heterojunction solar cells　　　　　　　　　　　　　　　
    Hossain Jaker; Kasahara Koji; Liu Qiming; Ishikawa Ryo; Ueno Keiji; Kaneko Tetsuya; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2016.1, First page：3709, Last page：3709, 03 Mar. 2016
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2016.1.0_3709
    DOI ID：10.11470/jsapmeeting.2016.1.0_3709, eISSN：2436-7613
  • Fabrication and characterization of (FAPbI3)1-x(MAPbBr3)x thin film from porous PbI2 thin film as precursor　　　　　　　　　　　　　　　
    Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2016.1, First page：2618, Last page：2618, 03 Mar. 2016
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2016.1.0_2618
    DOI ID：10.11470/jsapmeeting.2016.1.0_2618, eISSN：2436-7613
  • C-Si/PEDOT: PSS heterojunction solar cells with a MoO3 AR coating using chemical mist deposition method　　　　　　　　　　　　　　　
    Ichikawa Koki; Ohki Tatsuya; Hossain Jaker; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2015.2, First page：2392, Last page：2392, 31 Aug. 2015
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2015.2.0_2392
    DOI ID：10.11470/jsapmeeting.2015.2.0_2392, eISSN：2436-7613
  • Fabrication of metal-oxide/PEDOT:PSS/Si heterojunction tandem solar cells　　　　　　　　　　　　　　　
    yagi daichi; Kimura Takahiro; Ishikawa Ryo; Shirai Hajime; Ueno Keiji
    JSAP Annual Meetings Extended Abstracts, Volume：2015.2, First page：2432, Last page：2432, 31 Aug. 2015
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2015.2.0_2432
    DOI ID：10.11470/jsapmeeting.2015.2.0_2432, eISSN：2436-7613
  • High-performance heterojunction solar cells using layered chalcogenide atomic layer　　　　　　　　　　　　　　　
    Kimura Takahiro; Yagi Daichi; Ishikawa Ryo; Shirai Hajime; Ueno Keiji
    JSAP Annual Meetings Extended Abstracts, Volume：2015.2, First page：2431, Last page：2431, 31 Aug. 2015
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2015.2.0_2431
    DOI ID：10.11470/jsapmeeting.2015.2.0_2431, eISSN：2436-7613
  • Fine Structure of PEDOT:PSS Modified by PTSA/DMSO Cosolvent　　　　　　　　　　　　　　　
    Funada Shuji; Liu Qiming; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2015.2, First page：2394, Last page：2394, 31 Aug. 2015
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2015.2.0_2394
    DOI ID：10.11470/jsapmeeting.2015.2.0_2394, eISSN：2436-7613
  • Fabrication and characterization of (FAPbI3)1-x(MAPbBr3)x thin film by two step method　　　　　　　　　　　　　　　
    Ishikawa Ryo; Yamanaka Takanori; Honda Zentaro; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2015.2, First page：148, Last page：148, 31 Aug. 2015
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2015.2.0_148
    DOI ID：10.11470/jsapmeeting.2015.2.0_148, eISSN：2436-7613
  • FTIR-ATR study on c-Si/PEDOT:PSS interface and its PV performance　　　　　　　　　　　　　　　
    Funada Shuji; Ohki Tatuya; Ichikawa Kouki; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2015.1, First page：2513, Last page：2513, 26 Feb. 2015
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2015.1.0_2513
    DOI ID：10.11470/jsapmeeting.2015.1.0_2513, eISSN：2436-7613
  • Fabrication and characterization of CH(NH2)2Pb(I1-xBrx)3 thin film　　　　　　　　　　　　　　　
    Yamanaka Takanori; Ishikawa Ryou; Honda Zentarou; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2015.1, First page：2226, Last page：2226, 26 Feb. 2015
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2015.1.0_2226
    DOI ID：10.11470/jsapmeeting.2015.1.0_2226, eISSN：2436-7613
  • Textured-Si/PEDOT:PSS heterojunction solar cells using chemical mist deposition method　　　　　　　　　　　　　　　
    Ohki Tatsuya; Ichikawa Koki; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2015.1, First page：2512, Last page：2512, 26 Feb. 2015
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2015.1.0_2512
    DOI ID：10.11470/jsapmeeting.2015.1.0_2512, eISSN：2436-7613
  • Ferroelectric polymer inserted c-Si/PEDOT:PSS heterojunction solar cells　　　　　　　　　　　　　　　
    Masumori Kenta; Liu Qiming; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2015.1, First page：2514, Last page：2514, 26 Feb. 2015
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2015.1.0_2514
    DOI ID：10.11470/jsapmeeting.2015.1.0_2514, eISSN：2436-7613
  • Mist transport and sticking process of PEDOT:PSS on textured c-Si using CMD Ⅱ　　　　　　　　　　　　　　　
    Ohki Tatsuya; Sugawara Hiromitsu; Ichikawa Koki; Ku Pei-ju; Fujiyama Kazuhiko; Hanajiri Tatsuro; Ishikawa Ryo; Ueno Keiji; Sun Kienwen; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2014.2, First page：3474, Last page：3474, 01 Sep. 2014
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2014.2.0_3474
    DOI ID：10.11470/jsapmeeting.2014.2.0_3474, eISSN：2436-7613
  • Perovskite photovoltaic cells with electron-transporting layers of zinc oxide nanoparticles(2)　　　　　　　　　　　　　　　
    Ishikawa Ryo; Yamanaka Takanori; Honda Zentaro; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2014.2, First page：2494, Last page：2494, 01 Sep. 2014
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2014.2.0_2494
    DOI ID：10.11470/jsapmeeting.2014.2.0_2494, eISSN：2436-7613
  • Improvement in the performance of Si/PEDOT:PSS heterojunction solar cells by inserting metal oxide layers　　　　　　　　　　　　　　　
    Yagi Daichi; Takei Yuki; Ishikawa Ryo; Shirai Hajime; Ueno Keiji
    JSAP Annual Meetings Extended Abstracts, Volume：2014.2, First page：2434, Last page：2434, 01 Sep. 2014
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2014.2.0_2434
    DOI ID：10.11470/jsapmeeting.2014.2.0_2434, eISSN：2436-7613
  • Degradation of Si/PEDOT:PSS heterojunction solar cells under the illumination　　　　　　　　　　　　　　　
    Takei Yuki; Yagi Daichi; Ishikawa Ryo; Shirai Hajime; Ueno Keiji
    JSAP Annual Meetings Extended Abstracts, Volume：2014.2, First page：2419, Last page：2419, 01 Sep. 2014
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2014.2.0_2419
    DOI ID：10.11470/jsapmeeting.2014.2.0_2419, eISSN：2436-7613
  • 2D map of photovoltaic parameters in c-Si/PEDOT:PSS heterojunction solar cells　　　　　　　　　　　　　　　
    Liu Qiming; Ohki Tatsuya; Kakinuma Takayuki; Ishwor Khatri; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2014.1, First page：3530, Last page：3530, 03 Mar. 2014
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2014.1.0_3530
    DOI ID：10.11470/jsapmeeting.2014.1.0_3530, eISSN：2436-7613
  • Preparation of (CH3NH3)PbI3 thin films and it’s photoconductive property　　　　　　　　　　　　　　　
    Yamanaka Takanori; Watanabe Kyouhei; Qiming Liu; Ishikawa Ryou; Honda Zentarou; Ueno Keizi; Shirai Hazime
    JSAP Annual Meetings Extended Abstracts, Volume：2014.1, First page：2239, Last page：2239, 03 Mar. 2014
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2014.1.0_2239
    DOI ID：10.11470/jsapmeeting.2014.1.0_2239, eISSN：2436-7613
  • 2D mapping of photovoltaic performance of c-Si/PEDOT:PSS heterojunction solar cells　　　　　　　　　　　　　　　
    Ohki Tatsuya; Miyauchi Naoto; Sugawara Hiromitsu; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2014.1, First page：3529, Last page：3529, 03 Mar. 2014
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2014.1.0_3529
    DOI ID：10.11470/jsapmeeting.2014.1.0_3529, eISSN：2436-7613
  • Gas phase diagnostics of PEDOT:PSS mist transport and morphology on textured Si　　　　　　　　　　　　　　　
    Sugawara Hiromitsu; Miyauchi Naoto; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2014.1, First page：3528, Last page：3528, 03 Mar. 2014
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2014.1.0_3528
    DOI ID：10.11470/jsapmeeting.2014.1.0_3528, eISSN：2436-7613
  • Real-time characterization of mist-deposited graphene oxide (GO) by spectroscopic ellipsometry　　　　　　　　　　　　　　　
    Funada Shuji; Hiate Taiga; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2014.1, First page：3631, Last page：3631, 03 Mar. 2014
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2014.1.0_3631
    DOI ID：10.11470/jsapmeeting.2014.1.0_3631, eISSN：2436-7613
  • The effect of inserting a-Si:H for c-Si/PEDOT:PSS heterojunction solar cells　　　　　　　　　　　　　　　
    Watanabe Kyohei; Liu Qiming; Khatri Ishwor; Ishikawa Ryo; Ueno Keiji; Shirai Hajime
    JSAP Annual Meetings Extended Abstracts, Volume：2014.1, First page：3565, Last page：3565, 03 Mar. 2014
    The Japan Society of Applied Physics, Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2014.1.0_3565
    DOI ID：10.11470/jsapmeeting.2014.1.0_3565, eISSN：2436-7613
  • forum in FORUM 顕微レーザーラマン分光光度計in Viaの紹介　　　　　　　　　　　　　　　
    石川 良
    Number：5, First page：24, Last page：26, 2014
    Japanese
    CiNii Articles ID：40020298086, CiNii Books ID：AA12504266
  • 結晶Si/PEDOT:PSSへテロ接合太陽電池の水素パッシベーション効果　　　　　　　　　　　　　　　
    渡辺 恭平; 山中 孝紀; 石川 良; 上野 啓司; 白井 肇
    Volume：2013.2, First page：4218, Last page：4218, 31 Aug. 2013
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2013.2.0_4218
    DOI ID：10.11470/jsapmeeting.2013.2.0_4218, eISSN：2436-7613
  • 分光エリプソメトリーによるテクスチャー構造c-Si上PEDOT:PSS塗布形態の考察　　　　　　　　　　　　　　　
    宮内 直人; 菅原 広充; 石川 良; 上野 啓示; 白井 肇
    Volume：2013.2, First page：4219, Last page：4219, 31 Aug. 2013
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2013.2.0_4219
    DOI ID：10.11470/jsapmeeting.2013.2.0_4219, eISSN：2436-7613
  • パリレン積層膜による結晶Si/PEDOT:PSSヘテロ接合太陽電池の耐久性向上　　　　　　　　　　　　　　　
    武居 雄輝; 石川 良; 白井 肇; 上野 啓司
    Volume：2013.2, First page：3338, Last page：3338, 31 Aug. 2013
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2013.2.0_3338
    DOI ID：10.11470/jsapmeeting.2013.2.0_3338, eISSN：2436-7613
  • 基板面方位による結晶Si/PEDOT:PSSヘテロ接合太陽電池の特性変化　　　　　　　　　　　　　　　
    石川 良; 柴山 拓; 白井 肇; 上野 啓司
    Volume：2013.2, First page：3332, Last page：3332, 31 Aug. 2013
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2013.2.0_3332
    DOI ID：10.11470/jsapmeeting.2013.2.0_3332, eISSN：2436-7613
  • 分光エリプソメトリーにおける酸化グラフェンの評価　　　　　　　　　　　　　　　
    船田 修司; 日當 大我; 上野 啓司; 石川 良; 白井 肇
    Volume：2013.2, First page：4266, Last page：4266, 31 Aug. 2013
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2013.2.0_4266
    DOI ID：10.11470/jsapmeeting.2013.2.0_4266, eISSN：2436-7613
  • 酸化チタンナノ粒子を電子輸送層とする逆型有機薄膜太陽電池　　　　　　　　　　　　　　　
    石川 良; 白井 肇; 上野 啓司
    Volume：2013.2, First page：3377, Last page：3377, 31 Aug. 2013
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2013.2.0_3377
    DOI ID：10.11470/jsapmeeting.2013.2.0_3377, eISSN：2436-7613
  • 可溶性グラフェンを基盤材料に用いたZnO系TFT　　　　　　　　　　　　　　　
    柿沼 貴之; 菊池 智大; 菅沼 洸一; 石川 良; 上野 啓司; 白井 肇
    Volume：2013.1, First page：3517, Last page：3517, 11 Mar. 2013
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2013.1.0_3517
    DOI ID：10.11470/jsapmeeting.2013.1.0_3517, eISSN：2436-7613
  • Agナノワイヤーand MWCNTsを用いたc-Si/PEDOT:PSS接合太陽電池　　　　　　　　　　　　　　　
    渡邊 郁弥; 星野 彩; 石川 良; 上野 啓司; 白井 肇
    Volume：2013.1, First page：2484, Last page：2484, 11 Mar. 2013
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2013.1.0_2484
    DOI ID：10.11470/jsapmeeting.2013.1.0_2484, eISSN：2436-7613
  • 酸化グラフェンをテンプレートに利用した薄膜SiおよびAZO剥離転写　　　　　　　　　　　　　　　
    渡辺 恭平; 越野 秀人; 石川 良; 上野 啓司; 白井 肇
    Volume：2013.1, First page：3450, Last page：3450, 11 Mar. 2013
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2013.1.0_3450
    DOI ID：10.11470/jsapmeeting.2013.1.0_3450, eISSN：2436-7613
  • Si ナノワイヤ配列の形成と PEDOT:PSS の埋め込みプロセス　　　　　　　　　　　　　　　
    今村 教嗣; 石川 良; 上野 啓司; 白井 肇
    Volume：2013.1, First page：2544, Last page：2544, 11 Mar. 2013
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2013.1.0_2544
    DOI ID：10.11470/jsapmeeting.2013.1.0_2544, eISSN：2436-7613
  • 可溶性酸化グラフェンを基盤材料とした結晶Si系太陽電池　　　　　　　　　　　　　　　
    星野 彩; 渡邊 郁弥; 石川 良; 上野 啓司; 白井 肇
    Volume：2013.1, First page：3484, Last page：3484, 11 Mar. 2013
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2013.1.0_3484
    DOI ID：10.11470/jsapmeeting.2013.1.0_3484, eISSN：2436-7613
  • MoO3添加PEDOT:PSSの微細構造と結晶Si系太陽電池　　　　　　　　　　　　　　　
    劉 奇明; 石川 良; 上野 啓司; 白井 肇
    Volume：2013.1, First page：2485, Last page：2485, 11 Mar. 2013
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2013.1.0_2485
    DOI ID：10.11470/jsapmeeting.2013.1.0_2485, eISSN：2436-7613
  • PEDOT:PSSの光学異方性と結晶Si接合系太陽電池　　　　　　　　　　　　　　　
    石川 恭兵; 日當 大我; 石川 良; 上野 啓司; 白井 肇
    Volume：2013.1, First page：2543, Last page：2543, 11 Mar. 2013
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2013.1.0_2543
    DOI ID：10.11470/jsapmeeting.2013.1.0_2543, eISSN：2436-7613
  • 酸化亜鉛ナノ粒子を電子輸送層とする逆型有機薄膜太陽電池(2)　　　　　　　　　　　　　　　
    石川 良; 白井 肇; 上野 啓司
    Volume：2013.1, First page：2541, Last page：2541, 11 Mar. 2013
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2013.1.0_2541
    DOI ID：10.11470/jsapmeeting.2013.1.0_2541, eISSN：2436-7613
  • 酸化グラフェン(GO)薄片のC2H2/Arプラズマ処理による低抵抗化　　　　　　　　　　　　　　　
    渡邊 郁弥; 星野 彩; 菅沼 洸一; 石川 良; 上野 啓司; 白井 肇
    Volume：2012.2, First page：3603, Last page：3603, 27 Aug. 2012
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2012.2.0_3603
    DOI ID：10.11470/jsapmeeting.2012.2.0_3603, eISSN：2436-7613
  • Siテクスチャー上の結晶Si/PEDOT:PSS接合太陽電池　　　　　　　　　　　　　　　
    宮内 直人; 今村 教嗣; 劉 奇明; 石川 良; 上野 啓司; 白井 肇
    Volume：2012.2, First page：2602, Last page：2602, 27 Aug. 2012
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2012.2.0_2602
    DOI ID：10.11470/jsapmeeting.2012.2.0_2602, eISSN：2436-7613
  • 結晶Ｓｉ上の霧化塗布(CMD)法によるＰＥＤＯＴ：ＰＳＳ製膜　　　　　　　　　　　　　　　
    今村 教嗣; 石川 良; 上野 啓司; 白井 肇
    Volume：2012.2, First page：2600, Last page：2600, 27 Aug. 2012
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2012.2.0_2600
    DOI ID：10.11470/jsapmeeting.2012.2.0_2600, eISSN：2436-7613
  • フッ素系界面活性剤層の挿入による有機薄膜太陽電池の性能向上　　　　　　　　　　　　　　　
    石川 良; 白井 肇; 上野 啓司
    Volume：2012.2, First page：2568, Last page：2568, 27 Aug. 2012
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2012.2.0_2568
    DOI ID：10.11470/jsapmeeting.2012.2.0_2568, eISSN：2436-7613
  • 酸化グラフェンを正孔輸送層とする有機薄膜太陽電池素子のUV-O3処理による性能向上　　　　　　　　　　　　　　　
    久保 洋輔; 石川 良; 白井 肇; 後藤 拓也; 上野 啓司
    Volume：2012.1, First page：2772, Last page：2772, 29 Feb. 2012
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2012.1.0_2772
    DOI ID：10.11470/jsapmeeting.2012.1.0_2772, eISSN：2436-7613
  • 結晶Si/PEDOT:PSS:GOへテロ接合素子のキャリア輸送特性　　　　　　　　　　　　　　　
    唐 澤国; 小野 正浩; 猪野 智久; 石川 良; 上野 啓司; 白井 肇
    Volume：2012.1, First page：427, Last page：427, 29 Feb. 2012
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2012.1.0_427
    DOI ID：10.11470/jsapmeeting.2012.1.0_427, eISSN：2436-7613
  • 有機薄膜太陽電池の光電変換層へのグラフェンドーピング効果（2）　　　　　　　　　　　　　　　
    石川 良; 後藤 拓也; 白井 肇; 上野 啓司
    Volume：2011.2, First page：2161, Last page：2161, 16 Aug. 2011
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2011.2.0_2161
    DOI ID：10.11470/jsapmeeting.2011.2.0_2161, eISSN：2436-7613
  • DMSOドープPEDOT:PSSをTCOに用いたCuPc/C60へテロ接合型太陽電池　　　　　　　　　　　　　　　
    村松 義之; 林 達也; 猪野 智久; 石川 良; 上野 啓司
    Volume：2011.1, First page：2802, Last page：2802, 09 Mar. 2011
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2011.1.0_2802
    DOI ID：10.11470/jsapmeeting.2011.1.0_2802, eISSN：2436-7613
  • 酸化グラフェンを正孔輸送層に用いたCuPc/C60太陽電池　　　　　　　　　　　　　　　
    林 達也; 猪野 智久; 村松 義之; 久保 洋輔; 石川 良; 後藤 拓也; 上野 啓司; 白井 肇
    Volume：2010.2, First page：2115, Last page：2115, 30 Aug. 2010
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2010.2.0_2115
    DOI ID：10.11470/jsapmeeting.2010.2.0_2115, eISSN：2436-7613
  • CuPc/C60太陽電池素子性能におけるPEDOT:PSSの低温プラズマ処理効果　　　　　　　　　　　　　　　
    猪野 智久; 林 達也; 石川 良; 菅沼 洸一; 上野 啓司; 白井 肇
    Volume：2010.2, First page：2130, Last page：2130, 30 Aug. 2010
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2010.2.0_2130
    DOI ID：10.11470/jsapmeeting.2010.2.0_2130, eISSN：2436-7613
  • 化学的薄片剥離により形成したグラフェン薄膜の電子エネルギー損失分光測定(2):還元状態の深さ方向解析　　　　　　　　　　　　　　　
    石川 良; 吉田 雅史; 斉木 幸一朗; 後藤 拓也; 上野 啓司
    Volume：2010.1, First page：3784, Last page：3784, 03 Mar. 2010
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2010.1.0_3784
    DOI ID：10.11470/jsapmeeting.2010.1.0_3784, eISSN：2436-7613
  • プラズマ処理PEDOT:PSS基板上 CuPc/C60太陽電池　　　　　　　　　　　　　　　
    林 達也; 猪野 智久; 白井 肇; 上野 啓司; 石川 良
    Volume：2010.1, First page：2383, Last page：2383, 03 Mar. 2010
    Japanese
    DOI：https://doi.org/10.11470/jsapmeeting.2010.1.0_2383
    DOI ID：10.11470/jsapmeeting.2010.1.0_2383, eISSN：2436-7613
■ Books and other publications
  • ペロブスカイト太陽電池の開発動向と特性改善　　　　　　　　　　　　　　　
    技術情報協会, [Contributor]
    Dec. 2024
    Japanese, Total pages：449p, Responsible for pages：120p-131p
    CiNii Books：http://ci.nii.ac.jp/ncid/BD10067932
    ISBN：9784867980538, CiNii Books ID：BD10067932
■ Research projects
  • 凹凸基板へのキャリア輸送層の形成とペロブスカイト太陽電池への応用　　　　　　　　　　　　　　　
    01 Apr. 2023 - 31 Mar. 2026
    Grant amount(Total)：4680000, Direct funding：3600000, Indirect funding：1080000
    Grant number：23K03921
    論文ID：47363549
  • Crystalline Si/perobskite triple junction solar cells by mist deposition　　　　　　　　　　　　　　　
    Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Grant-in-Aid for Scientific Research (C), 01 Apr. 2020 - 31 Mar. 2023
    Saitama University
    Grant amount(Total)：4290000, Direct funding：3300000, Indirect funding：990000
    Grant number：20K05318
  • Self-assembled passivation layer for high performance perovskite solar cells　　　　　　　　　　　　　　　
    Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Early-Career Scientists, 01 Apr. 2020 - 31 Mar. 2022
    Ryo Ishikawa, Saitama University
    Grant amount(Total)：4290000, Direct funding：3300000, Indirect funding：990000
    In perovskite solar cells, the quality of the film is essential, but the passivation of the surface and interface is necessary not only for high performance but also for high durability. Passivation by post-treatment is very useful, but its drawback is that it increases the number and time of processes.
    When fluorinated polymers and fluorophosphoric acid are added to perovskite precursors, the fluorinated polymers and fluorophosphoric acid self-segregate on the surface of the perovskite thin film within a few to ten nm during film formation, as determined by depth analysis of X-ray photoelectron spectroscopy. The self-segregated fluorophosphorous materials served as a passivation layer, and a maximum photostabilized output of 20.4% was obtained without any post-treatment.
    Grant number：20K14774
  • Solution-processed c-Si/Perovskite 2-terminal multijuntion solar cell　　　　　　　　　　　　　　　
    Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Grant-in-Aid for Scientific Research (C), 01 Apr. 2017 - 31 Mar. 2020
    Shirai Hajime, Saitama University
    Grant amount(Total)：4680000, Direct funding：3600000, Indirect funding：1080000
    We investigated the solution-processed n-type crystalline Si(n-Si)/perovskite FACsPbI3 tandem solar cells. For the bottom n-Si/PEDOT:PSS heterojunction solar cells, we studied the solution-processed TiO2 as AR coating layer and hole-blocking layer at the cathode interface. The power conversion efficiency (PCE) increased to 15.4% by adjuting the layer thickness of TiO2. For the bottom perobskite FA0.8Cs0.2PbI3 thin-film solar cells, the PCE of 16-20% has been establihed by using TSC/DMF/CHP cosolvent using SnO2 as an electron transporting layer. We extend to the fabrication of 2-terminal monolicic tandem solar cell of n-Si/Perovksite using Ag nanowire adn obtained 14.% with a open-circuit voltage of 1.57V
    Grant number：17K06341
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