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OHDAIRA, Keisuke Professor
Materials Science, Sustainable Innovation

Published Papers

200 items
Hydrogenation by catalytically generated atomic hydrogen for passivating contacts in crystalline silicon solar cells
Yuli Wen, Huynh Thi Cam Tu, Keisuke Ohdaira
Vacuum, 229, 113593-113593, 2024
Formation of n-type polycrystalline silicon with controlled doping concentration by flash lamp annealing of catalytic CVD amorphous silicon films
Zheng Wang, Huynh Thi Cam Tu, Keisuke Ohdaira
Japanese Journal of Applied Physics, 63, 10, 105501-105501, 2024
Tungsten-Doped ZnO as an Electron Transport Layer for Perovskite Solar Cells: Enhancing Efficiency and Stability
Munkhtuul Gantumur, Mohammad Ismail Hossain, Md. Shahiduzzaman, Asman Tamang, Junayed Hossain Rafij, Md. Shahinuzzaman, Huynh Thi Cam Tu, Masahiro Nakano, Makoto Karakawa, Keisuke Ohdaira, Hamad AlMohamadi, Mohd Adib Ibrahim, Kamaruzzaman Sopian, Md. Akhtaruzzaman, Jean Michel Nunzi, Tetsuya Taima
ACS Applied Materials & Interfaces, -, 2024
High Passivation Performance of Cat-CVD i-a-Si:H Derived from Bayesian Optimization with Practical Constraints
Ryota Ohashi, Kentaro Kutsukake, Huynh Thi Cam Tu, Koichi Higashimine, Keisuke Ohdaira
ACS Applied Materials & Interfaces, 16, 7, 9428-9435, 2024
Delay of the potential-induced degradation of n-type crystalline silicon photovoltaic modules by the prior application of reverse bias
Deqin Wu, Huynh Thi Cam Tu, Keisuke OHDAIRA
Japanese Journal of Applied Physics, 63, 2, 02SP06-02SP06, 2024
Long term stability of low temperature deposited Cat-CVD SiN x thin film against damp-heat stress
Huynh Thi Cam Tu, Keisuke OHDAIRA
Japanese Journal of Applied Physics, 63, 1, 01SP25-01SP25, 2024
Ultrathin Al-doped SiO x passivating hole-selective contacts formed by a simple wet process
Hiroki Nakajima, Huynh Thi Cam Tu, Keisuke Ohdaira
Japanese Journal of Applied Physics, 62, SK, SK1040-SK1040, 2023
Potential-induced degradation of encapsulant-less p-type crystalline Si photovoltaic modules
Shuntaro Shimpo, Huynh Thi Cam Tu, Keisuke Ohdaira
Japanese Journal of Applied Physics, 62, SK, SK1039-SK1039, 2023
Second-stage potential-induced degradation of n-type front-emitter crystalline silicon photovoltaic modules and its recovery
Keisuke Ohdaira, Yutaka Komatsu, Seira Yamaguchi, Atsushi Masuda
Japanese Journal of Applied Physics, 62, SK, SK1033-SK1033, 2023
Encapsulation-free crystalline silicon photovoltaic modules and their hygrothermal and thermal-cycle tolerance
Nobuhito Imajo, Yo Yamakawa, Hiroaki Takahashi, Keisuke Ohdaira, Atsushi Masuda
Japanese Journal of Applied Physics, 62, SK, SK1025-SK1025, 2023
Application of Si-related Ultrathin (∼1 nm) Films to Crystalline Silicon Solar Cells
Keisuke Ohdaira, Hiroki Nakajima, Yuli WEN, Huynh Thi Cam Tu
Vacuum and Surface Science, 66, 2, 91-96, 2023
Potential-induced degradation of n-type front-emitter crystalline silicon photovoltaic modules — Comparison between indoor and outdoor test results
Keisuke Ohdaira, Minoru Akitomi, Yasuo Chiba, Atsushi Masuda
Solar Energy Materials and Solar Cells, 249, 112038-112038, 2023
Mechanistic Understanding of Polarization‐Type Potential‐Induced Degradation in Crystalline‐Silicon Photovoltaic Cell Modules
Seira Yamaguchi, Atsushi Masuda, Kazuhiro Marumoto, Keisuke Ohdaira
Advanced Energy and Sustainability Research, 2200167-2200167, 2022
Cat-CVD SiNx as a gas barrier for application to perovskite solar cells
Huynh Thi Cam Tu, Ai Shimazaki, Ryuji Kaneko, Atsushi Wakamiya, Keisuke Ohdaira
Japanese Journal of Applied Physics, 61, 12, 121002-121002, 2022
Effects of SiNx refractive index and SiO2 thickness on polarization‐type potential‐induced degradation in front‐emitter n‐type crystalline‐silicon photovoltaic cell modules
Seira Yamaguchi, Kyotaro Nakamura, Taeko Semba, Keisuke Ohdaira, Kazuhiro Marumoto, Yoshio Ohshita, Atsushi Masuda
Energy Science & Engineering, 10, 7, 2268-2275, 2022
Hole‐Selective Ultrathin Al‐Doped SiOx Passivation Layer Formed by Immersing in Aluminum Nitrate Aqueous Solution
Hiroki Nakajima, Huynh Thi Cam Tu, Keisuke Ohdaira
physica status solidi (RRL) – Rapid Research Letters, 16, 7, 2200052-2200052, 2022
Carrier lifetime measurement of perovskite films by differential microwave photoconductivity decay
Keisuke Ohdaira, Huynh Thi Cam Tu, Ai Shimazaki, Ryuji Kaneko, Yuka Sumai, Md. Shahiduzzaman, Tetsuya Taima, Atsushi Wakamiya
Japanese Journal of Applied Physics, 61, 6, 068001-068001, 2022
Effect of temperature and pre-annealing on the potential-induced degradation of silicon heterojunction photovoltaic modules
Jiaming Xu, Huynh Thi Cam Tu, Atsushi Masuda, Keisuke Ohdaira
Japanese Journal of Applied Physics, 61, SC, SC1021-SC1021, 2022
Enhancement of ferroelectricity in sputtered HZO thin films by catalytically generated atomic hydrogen treatment
Mohit Mohit, Yuli Wen, Yuki Hara, Shinji MIGITA, Hiroyuki OTA, Yukinori Morita, Keisuke OHDAIRA, Eisuke TOKUMITSU
Japanese Journal of Applied Physics, 61, SH1004-SH1004, 2022
Use of n-type amorphous silicon films as an electron transport layer in the perovskite solar cells
Zhancheng Song, Yuuka Sumai, Huynh Thi Cam Tu, Md. Shahiduzzaman, Tetsuya Taima, Keisuke Ohdaira
Japanese Journal of Applied Physics, 61, SB, SB1012-SB1012, 2022
Crystallization of catalytic CVD hydrogenated n-a-Si films on textured glass substrates by flash lamp annealing
Zheng Wang, Huynh Thi Cam Tu, Keisuke Ohdaira
Japanese Journal of Applied Physics, 61, SB, SB1019-SB1019, 2022
Influence of light irradiation on the charge-accumulation-type potential-induced degradation of n-type front-emitter crystalline Si photovoltaic modules
Rongrong Zhao, Huynh Thi Cam Tu, Atsushi Masuda, Keisuke Ohdaira
Japanese Journal of Applied Physics, 61, SB, SB1023-SB1023, 2022
Potential‐Induced Degradation in High‐Efficiency n‐Type Crystalline‐Silicon Photovoltaic Modules: A Literature Review
Seira Yamaguchi, Bas B. Van Aken, Atsushi Masuda, Keisuke Ohdaira
Solar RRL, 5, 12, 2100708-2100708, 2021
Effects of passivation configuration and emitter surface doping concentration on polarization-type potential-induced degradation in n-type crystalline-silicon photovoltaic modules
Seira Yamaguchi, Bas B. Van Aken, Maciej K. Stodolny, Jochen Löffler, Atsushi Masuda, Keisuke Ohdaira
Solar Energy Materials and Solar Cells, 226, 111074-111074, 2021
Crystallization behavior of electron-beam-evaporated amorphous silicon films on textured glass substrates by flash lamp annealing
Aimi Yago, Keisuke Ohdaira
Thin Solid Films, 728, 138681-138681, 2021
Influence of light illumination on the potential-induced degradation of n-type interdigitated back-contact crystalline Si photovoltaic modules
Yuansong Xu, Atsushi Masuda, Keisuke Ohdaira
Japanese Journal of Applied Physics, 60, SB, SBBF08-SBBF08, 2021
Tunnel nitride passivated contacts for silicon solar cells formed by catalytic CVD
Yuli Wen, Huynh Thi Cam Tu, Keisuke Ohdaira
Japanese Journal of Applied Physics, 60, SB, SBBF09-SBBF09, 2021
Passivation of textured crystalline silicon with small pyramids by silicon nitride films formed by catalytic chemical vapor deposition and phosphorus catalytic impurity doping
Jing Liu, Keitaro Hamada, Seimei Akagi, Noboru Ooyagi, Yuzo Yamamoto, Keisuke Ohdaira
Surfaces and Interfaces, 21, 100690-100690, 2020
Probing the Mg2Si/Si(1 1 1) heterojunction for photovoltaic applications
Alexander Shevlyagin, Igor Chernev, Nikolay Galkin, Andrey Gerasimenko, Anton Gutakovskii, Hirofumi Hoshida (裕文 星田), Yoshikazu Terai (慶和寺井), Naofumi Nishikawa (尚史西川), Keisuke Ohdaira ( 圭介大平)
Solar Energy, 211, 383-395, 2020
Influence of emitter position of silicon heterojunction photovoltaic solar cell modules on their potential-induced degradation behaviors
Seira Yamaguchi, Chizuko Yamamoto, Yoshio Ohshita, Keisuke Ohdaira, Atsushi Masuda
Solar Energy Materials and Solar Cells, 216, 110716-110716, 2020
Effect of a silicon nitride film on the potential-induced degradation of n-type front-emitter crystalline silicon photovoltaic modules
Tomoyasu Suzuki, Atsushi Masuda, Keisuke Ohdaira
Japanese Journal of Applied Physics, 59, 10, 104002-104002, 2020
Barrier performance of ITO film on textured Si substrate
Shu Huei Hsieh, Wen Jauh Chen, Keisuke Ohdaira
Journal of Materials Science: Materials in Electronics, 31, 16, 13808-13816, 2020
Influence of hygrothermal stress on potential-induced degradation for homojunction and heterojunction crystalline Si photovoltaic modules
Atsushi MASUDA, Chizuko Yamamoto, Yukiko Hara, Sachiko Jonai, Yasushi Tachibana, Takeshi Toyoda, Toshiharu Minamikawa, Seira Yamaguchi, Keisuke OHDAIRA
Japanese Journal of Applied Physics, -, 2020
Preface - 10th International Conference on Hot-Wire CVD (Cat-CVD) Processes (HWCVD10)
K. Ohdaira, R. E. I. Schropp, A. M. Coclite, Y. Shi
Thin Solid Films, 693, 137610-1-, 2020
Thickness dependence of the passivation quality of Cat-CVD SiN x films
Wen Yuli, Keisuke Ohdaira
Japanese Journal of Applied Physics, 59, SC, SCCB07-SCCB07, 2019
Effect of a SiO2 film on the potential-induced degradation of n-type front-emitter crystalline Si photovoltaic modules
Tomoyasu Suzuki, Seira Yamaguchi, Kyotaro Nakamura, Atsushi Masuda, Keisuke Ohdaira
Japanese Journal of Applied Physics, 59, SC, SCCD02-SCCD02, 2019
Influence of backsheet materials on potential-induced degradation in n-type crystalline-silicon photovoltaic cell modules
Seira Yamaguchi, Chizuko Yamamoto, Atsushi Masuda, Keisuke Ohdaira
Japanese Journal of Applied Physics, 58, 12, 120901-120901, 2019
Fabrication of silicon heterojunction solar cells with a boron-doped a-Si:H layer formed by catalytic impurity doping
Katsuya Akiyama, Keisuke Ohdaira
AIP Advances, 9, 11, 115013-115013, 2019
Conversion of the conduction type of a catalytic-chemical-vapor-deposited p-type a-Si by PH3 plasma ion implantation
Huynh Thi Cam Tu, K. Koyama, N. Yamaguchi, H. Suzuki, K. Ohdaira, H. Matsumura
Thin Solid Films, 683, 150-155, 2019
Control of Texture Size on As-Cut Crystalline Silicon by Microparticle-Assisted Texturing (MPAT) Process
Cong Thanh Nguyen, Keisuke Ohdaira, Hideki Matsumura
Conference Record of the IEEE Photovoltaic Specialists Conference, 795-798, 2019
Oxygen additive effects on decomposition rate of poly(vinyl phenol)-based polymers using hydrogen radicals produced by a tungsten hot-wire catalyst
Masashi Yamamoto, Shiro Nagaoka, Keisuke Ohdaira, Hironobu Umemoto, Hideo Horibe
Thin Solid Films, 679, 22-26, 2019
Influence of sodium on the potential-induced degradation for n-type crystalline silicon photovoltaic modules
Keisuke Ohdaira, Yutaka Komatsu, Tomoyasu Suzuki, Seira Yamaguchi, Atsushi Masuda
Applied Physics Express, 12, 6, 064004-064004, 2019
Control of solution wettability on fine-textured crystalline silicon surface to obtain high-quality passivation for solar cells
Cong Thanh Nguyen, Keisuke Ohdaira, Hideki Matsumura
Applied Physics Letters, 114, 13, 133901-133901, 2019
Crystallization of electron beam evaporated a-Si films on textured glass substrates by flash lamp annealing
Keisuke Kurata, Keisuke Ohdaira
Japanese Journal of Applied Physics, 58, SB, SBBF10-SBBF10, 2019
Improvement in the passivation quality of catalytic-chemical-vapor-deposited silicon nitride films on crystalline Si at room temperature
Jun'ichiro Miyaura, Keisuke Ohdaira
Thin Solid Films, 674, 103-106, 2019
Vacuum deposition of CsPbI3 layers on textured Si for Perovskite/Si tandem solar cells
Keitaro Hamada, Kyosuke Yonezawa, Kohei Yamamoto, Tetsuya Taima, Shuzi Hayase, Noboru Ooyagi, Yuzo Yamamoto, Keisuke Ohdaira
Japanese Journal of Applied Physics, 58, SB, SBBF06-SBBF06, 2019
Barrier Properties of Electroplating Nickel Layer for Copper Metallization in Silicon Solar Cells
You Ren Cheng, Wen Jauh Chen, Keisuke Ohdaira, Koichi Higashimine
International Journal of Electrochemical Science, 11516-11525, 2018
Low Cost Fabrication of Back Contact Crystalline-Silicon Heterojunction Solar Cells with n-a-Si Layers Partially Converted from p-a-Si by Phosphine (PH 3 ) Plasma Ion-Implantation
Huynh Thi Cam Tu, Koichi Koyama, Noboru Yamaguchi, Hideo Suzuki, Keisuke Ohdaira, Hideki Matsumura
2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC, 2021-2023, 2018
Performance of silicon heterojunction solar cells with various metal-electrodes directly formed on a-Si films without insertion of TCO
Takeo Konishi, Koichi Koyama, Keisuke Ohdaira, Hideki Matsumura
2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC, 2036-2038, 2018
Silicon Heterojunction Solar Cell with a p-type Amorphous Silicon Emitter Formed by Catalytic Impurity Doping
Katsuya Akiyama, Keisuke Ohdaira
2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC, 2097-2099, 2018
Rapid progression and subsequent saturation of polarization-type potential-induced degradation of n-type front-emitter crystalline-silicon photovoltaic modules
Seira Yamaguchi, Kyotaro Nakamura, Atsushi Masuda, Keisuke Ohdaira
Japanese Journal of Applied Physics, 57, 12, 122301-122301, 2018
Effect of evacuating a chamber on the degradation rate of solar cells in a cell-level potential-induced degradation test
Seira Yamaguchi, Keisuke Ohdaira
Japanese Journal of Applied Physics, 57, 10, 108002-108002, 2018
High-quality surface passivation of crystalline silicon with chemical resistance and optical transparency by using catalytic chemical vapor deposition SiN x layers and an ultrathin SiO x film
Huynh Thi Cam Tu, Koichi Koyama, Cong Thanh Nguyen, Keisuke Ohdaira, Hideki Matsumura
Japanese Journal of Applied Physics, 57, 8S3, 08RB17-08RB17, 2018
Texture size control by mixing glass microparticles with alkaline solution for crystalline silicon solar cells
Cong Thanh Nguyen, Koichi Koyama, Huynh Thi Cam Tu, Keisuke Ohdaira, Hideki Matsumura
Journal of Materials Research, 33, 11, 1515-1522, 2018
Passivation effect of ultra-thin SiN x films formed by catalytic chemical vapor deposition for crystalline silicon surface
Hao Song, Keisuke Ohdaira
Japanese Journal of Applied Physics, 57, 8S3, 08RB03-08RB03, 2018
Multistage performance deterioration in n-type crystalline silicon photovoltaic modules undergoing potential-induced degradation
Yutaka Komatsu, Seira Yamaguchi, Atsushi Masuda, Keisuke Ohdaira
Microelectronics Reliability, 84, 127-133, 2018
Comprehensive study of potential-induced degradation in silicon heterojunction photovoltaic cell modules
Seira Yamaguchi, Chizuko Yamamoto, Keisuke Ohdaira, Atsushi Masuda
Progress in Photovoltaics: Research and Applications, 26, 697-708, 2018
Effect of starting point formation on the crystallization of amorphous silicon films by flash lamp annealing
Daiki Sato, Keisuke Ohdaira
Japanese Journal of Applied Physics, 57, 4S, 04FS05-04FS05, 2018
Direct observation of changes in the effective minority-carrier lifetime of SiN x -passivated n-type crystalline-silicon substrates caused by potential-induced degradation and recovery tests
Naoyuki Nishikawa, Seira Yamaguchi, Keisuke Ohdaira
Microelectronics Reliability, 79, 91-95, 2017
Super water-repellent treatment of various cloths by deposition of catalytic-CVD polytetrafluoroethylene films
Hideki Matsumura, Mai Mishiro, Michihisa Takachi, Keisuke Ohdaira
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 35, 6, 061514-061514, 2017
Degradation behavior of crystalline silicon solar cells in a cell-level potential-induced degradation test
Seira Yamaguchi, Keisuke Ohdaira
Solar Energy, 155, 739-744, 2017
Improved quality of flash-lamp-crystallized polycrystalline silicon films by using low defect density Cat-CVD a-Si films
Takaki Nozawa, Keisuke Ohdaira
International Journal of Materials Research, 108, 10, 827-831, 2017
Passivation of textured crystalline silicon surfaces by catalytic CVD silicon nitride films and catalytic phosphorus doping
Keisuke Ohdaira, Trinh Thi Cham, Hideki Matsumura
Japanese Journal of Applied Physics, 56, 10, 102301-102301, 2017
Indium tin oxide sputtering damage to catalytic chemical vapor deposited amorphous silicon passivation films and its recovery
Takeo Konishi, Keisuke Ohdaira
Thin Solid Films, 635, 73-77, 2017
Preface
Ruud E.I. Schropp, Anna Maria Coclite, Keisuke Ohdaira, Kenneth K.S. Lau
Thin Solid Films, 635, 1-2, 2017
Erratum to “Preface- The 9th International Conference on Hot Wire (Cat) and Initiated Chemical Vapor Deposition” [Thin Solid Films 635 (2017) 1–2]
Ruud E.I. Schropp, Anna Maria Coclite, Keisuke Ohdaira, Kenneth K.S. Lau
Thin Solid Films, 636, 744-744, 2017
Simple fabrication of back contact heterojunction solar cells by plasma ion implantation
Koichi Koyama, Noboru Yamaguchi, Daisuke Hironiwa, Hideo Suzuki, Keisuke Ohdaira, Hideki Matsumura
Japanese Journal of Applied Physics, 56, 8S2, 08MB21-08MB21, 2017
Catalytic phosphorus and boron doping of amorphous silicon films for application to silicon heterojunction solar cells
Keisuke Ohdaira, Junichi Seto, Hideki Matsumura
Japanese Journal of Applied Physics, 56, 8S2, 08MB06-08MB06, 2017
Novel chemical cleaning of textured crystalline silicon for realizing surface recombination velocity <0.2 cm/s using passivation catalytic CVD SiNx/amorphous silicon stacked layers
Cong Thanh Nguyen, Koichi Koyama, Koichi Higashimine, Shigeki Terashima, Chikao Okamoto, Shuichiro Sugiyama, Keisuke Ohdaira, Hideki Matsumura
Japanese Journal of Applied Physics, 56, 5, 056502-056502, 2017
Effect of antireflection coating on the crystallization of amorphous silicon films by flash lamp annealing
Yuki Sonoda, Keisuke Ohdaira
Japanese Journal of Applied Physics, 56, 4S, 04CS10-04CS10, 2017
Reduction in the short-circuit current density of silicon heterojunction photovoltaic modules subjected to potential-induced degradation tests
Seira Yamaguchi, Chizuko Yamamoto, Keisuke Ohdaira, Atsushi Masuda
Solar Energy Materials and Solar Cells, 161, 439-443, 2017
Photoresist Removal Using H Radicals Generated by Iridium Hot-Wire Catalyst
Masashi Yamamoto, Shiro Nagaoka, Hironobu Umemoto, Keisuke Ohdaira, Takashi Nishiyama, Hideo Horibe
International Journal of Polymer Science, 2017, 1-5, 2017
Pressure Dependence of Photoresist Removal Rate Using Hydrogen Radicals
Masashi Yamamoto, Tomohiro Shiroi, Shiro Nagaoka, Tomokazu Shikama, Hironobu Umemoto, Keisuke Ohdaira, Seiji Takagi, Takashi Nishiyama, Hideo Horibe
Journal of Photopolymer Science and Technology, 30, 3, 297-301, 2017
Progression of rapid potential-induced degradation of n-type single-crystalline silicon photovoltaic modules
Seira Yamaguchi, Atsushi Masuda, Keisuke Ohdaira
Applied Physics Express, 9, 11, 112301-112301, 2016
Suppression of the epitaxial growth of Si films in Si heterojunction solar cells by the formation of ultra-thin oxide layers
Keisuke Ohdaira, Takafumi Oikawa, Koichi Higashimine, Hideki Matsumura
Current Applied Physics, 16, 9, 1026-1029, 2016
Changes in the current density–voltage and external quantum efficiency characteristics of n-type single-crystalline silicon photovoltaic modules with a rear-side emitter undergoing potential-induced degradation
Seira Yamaguchi, Atsushi Masuda, Keisuke Ohdaira
Solar Energy Materials and Solar Cells, 151, 113-119, 2016
Oxygen additive amount dependence of rate of photoresist removal by H radicals generated on a tungsten hot-wire catalyst
Masashi Yamamoto, Hironobu Umemoto, Keisuke Ohdaira, Tomokazu Shikama, Takashi Nishiyama, Hideo Horibe
Japanese Journal of Applied Physics, 55, 7, 076503-076503, 2016
Behavior of the potential-induced degradation of photovoltaic modules fabricated using flat mono-crystalline silicon cells with different surface orientations
Seira Yamaguchi, Atsushi Masuda, Keisuke Ohdaira
JAPANESE JOURNAL OF APPLIED PHYSICS, 55, 4, -, 2016
Formation of amorphous silicon passivation films with high stability against postannealing, air exposure, and light soaking using liquid silicon
Cheng Guo, Keisuke Ohdaira, Hideyuki Takagishi, Takashi Masuda, Zhongrong Shen, Tatsuya Shimoda
Japanese Journal of Applied Physics, 55, 4S, 04ES12-04ES12, 2016
Catalytic doping of phosphorus and boron atoms on hydrogenated amorphous silicon films
Junichi Seto, Keisuke Ohdaira, Hideki Matsumura
Japanese Journal of Applied Physics, 55, 4S, 04ES05-04ES05, 2016
Defect termination on crystalline silicon surfaces by hydrogen for improvement in the passivation quality of catalytic chemical vapor-deposited SiNx and SiNx/P catalytic-doped layers
Trinh Cham Thi, Koichi Koyama, Keisuke Ohdaira, Hideki Matsumura
Japanese Journal of Applied Physics, 55, 2S, 02BF09-02BF09, 2016
Si Herojunction Solor Cells with a-si Passivation Films Formed from Liquid Si
Keisuke Ohdaira, Cheng Guo, Hideyuki Takagishi, Takashi Masuda, Zhongrong Shen, Tatsuya Shimoda
2016 IEEE 43RD PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC), 694-697, 2016
Enhancement of Removal Uniformity by Oxygen Addition for Photoresist Removal Using H Radicals Generated on a Tungsten Hot-Wire Catalyst
Masashi Yamamoto, Kazuma Maejima, Hironobu Umemoto, Keisuke Ohdaira, Tomokazu Shikama, Takashi Nishiyama, Hideo Horibe
Journal of Photopolymer Science and Technology, 29, 4, 639-642, 2016
Cat-CVD Passivation Realizing Extremely Low Surface Recombination Velocity < 0.2 cm/s in Solar Cell Structure
Cong Thanh Nguyen, Koichi Koyamal, Shigeki Terashimal, Chikao Okamoto, Shuichiro Sugiyama, Keisuke Ohdaira, Hideki Matsumura
2016 IEEE 43RD PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC), 1169-1172, 2016
Potential-Induced Degradation Behavior of n-Type Single-Crystalline Silicon Photovoltaic Modules with a Rear-Side Emitter
Seira Yamaguchi, Atsushi Masuda, Keisuke Ohdaira
2016 IEEE 43RD PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC), 938-942, 2016
Thermal Conductivity Measurement of Liquid-Quenched Higher Manganese Silicides
Shunsuke Nishino, Masanobu Miyata, Keisuke Ohdaira, Mikio Koyano, Tsunehiro Takeuchi
Journal of Electronic Materials, 45, 3, 1821-1826, 2015
The formation of poly-Si films on flat glass substrates by flash lamp annealing
Taiki Watanabe, Keisuke Ohdaira
Thin Solid Films, 595, 235-238, 2015
Preface — 8th International Conference on Hot-Wire CVD (Cat-CVD) Processes (HWCVD 8)
Mariadriana Creatore, Anna-Maria Coclite, Keisuke Ohdaira, Kenneth Lau
Thin Solid Films, 595, 215-216, 2015
Application of crystalline silicon surface oxidation to silicon heterojunction solar cells
Takafumi Oikawa, Keisuke Ohdaira, Koichi Higashimine, Hideki Matsumura
Current Applied Physics, 15, 10, 1168-1172, 2015
Phosphorus- and boron-doped hydrogenated amorphous silicon films prepared using vaporized liquid cyclopentasilane
Takashi Masuda, Hideyuki Takagishi, Zhongrong Shen, Keisuke Ohdaira, Tatsuya Shimoda
Thin Solid Films, 589, 221-226, 2015
Application of heterojunction to Si-based solar cells using photonic nanostructures coupled with vertically aligned Ge quantum dots
Isao Takahashi, Yusuke Hoshi, Takeshi Tayagaki, Takafumi Oikawa, Keisuke Ohdaira, Noritaka Usami
Japanese Journal of Applied Physics, 54, 8S1, 08KA06-08KA06, 2015
Improvement in passivation quality and open-circuit voltage in silicon heterojunction solar cells by the catalytic doping of phosphorus atoms
Shogo Tsuzaki, Keisuke Ohdaira, Takafumi Oikawa, Koichi Koyama, Hideki Matsumura
Japanese Journal of Applied Physics, 54, 7, 072301-072301, 2015
Comparison of crystalline-silicon/amorphous-silicon interface prepared by plasma enhanced chemical vapor deposition and catalytic chemical vapor deposition
Hideki Matsumura, Koichi Higashimine, Koichi Koyama, Keisuke Ohdaira
Journal of Vacuum Science &amp; Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena, 33, 3, 031201-031201, 2015
Thermal Conductivity Measurements of Aggregated (Bi1−x Sb x )2Te3 Nanoparticles Using 3ω Method
Shunsuke Nishino, Mikio Koyano, Keisuke Ohdaira
Journal of Electronic Materials, 44, 6, 2034-2038, 2015
Efficient Organic Devices Based on π-Electron Systems: Comparative Study of Fullerene Derivatives Blended with a High Efficiency Naphthobisthiadiazole-Based Polymer for Organic Photovoltaic Applications
Varun Vohra, Koichi Higashimine, Keisuke Ohdaira, Shogo Tsuzaki, Hideyuki Murata
Chemical Science of Electron Systems, 575-588, 2015
Low temperature boron doping into crystalline silicon by boron-containing species generated in Cat-CVD apparatus
Tatsunori Ohta, Koichi Koyama, Keisuke Ohdaira, Hideki Matsumura
Thin Solid Films, 575, 92-95, 2015
Photo-stability of a-Si solar cells fabricated by “Liquid-Si printing method” and treated with catalytic generated atomic hydrogen
Hiroko Murayama, Tatsushi Ohyama, Isao Yoshida, Akira Terakawa, Takashi Masuda, Keisuke Ohdaira, Tatsuya Shimoda
Thin Solid Films, 575, 100-102, 2015
The control of the film stress of Cat-CVD a-Si films and its impact on explosive crystallization induced by flash lamp annealing
Keisuke Ohdaira
Thin Solid Films, 575, 21-24, 2015
Effect of hydrogen on passivation quality of SiNx/Si-rich SiNx stacked layers deposited by catalytic chemical vapor deposition on c-Si wafers
Trinh Cham Thi, Koichi Koyama, Keisuke Ohdaira, Hideki Matsumura
Thin Solid Films, 575, 60-63, 2015
Enhancement of Photoresist Removal Rate by Using Atomic Hydrogen Generated under Low-pressure Conditions
Masashi Yamamoto, Hironobu Umemoto, Keisuke Ohdaira, Shiro Nagaoka, Tomokazu Shikama, Takashi Nishiyama, Hideo Horibe
Journal of Photopolymer Science and Technology, 28, 2, 303-306, 2015
Fabrication of high-quality amorphous silicon film from cyclopentasilane by vapor deposition between two parallel substrates
Zhongrong Shen, Takashi Masuda, Hideyuki Takagishi, Keisuke Ohdaira, Tatsuya Shimoda
Chemical Communications, 51, 21, 4417-4420, 2015
Photo-Carrier Generation at a-Si Layer in SiNx/a-Si Stacked Passivation with Extremely Low Surface Recombination Velocity
Koichi Koyama, Koichi Higashimine, Keisuke Ohdaira, Hideki Matsumura
2015 IEEE 42ND PHOTOVOLTAIC SPECIALIST CONFERENCE (PVSC), -, 2015
Cat-doping: Novel method for phosphorus and boron shallow doping in crystalline silicon at 80 degrees C
Hideki Matsumura, Taro Hayakawa, Tatsunori Ohta, Yuki Nakashima, Motoharu Miyamoto, Trinh Cham Thi, Koichi Koyama, Keisuke Ohdaira
JOURNAL OF APPLIED PHYSICS, 116, 11, -, 2014
A method to evaluate explosive crystallization velocity of amorphous silicon films during flash lamp annealing
Keisuke Ohdaira
CANADIAN JOURNAL OF PHYSICS, 92, 7-8, 718-722, 2014
Development of a-Si solar cells using "liquid-Si printing"
Hiroko Murayama, Tatsushi Ohyama, Akira Terakawa, Hideyuki Takagishi, Takashi Masuda, Keisuke Ohdaira, Tatsuya Shimoda
CANADIAN JOURNAL OF PHYSICS, 92, 7-8, 928-931, 2014
Drastic reduction in the surface recombination velocity of crystalline silicon passivated with catalytic chemical vapor deposited SiNx films by introducing phosphorous catalytic-doped layer
Trinh Cham Thi, Koichi Koyama, Keisuke Ohdaira, Hideki Matsumura
JOURNAL OF APPLIED PHYSICS, 116, 4, -, 2014
Development of a Thermal Conductivity Measurement System Using the 3 omega Method and Application to Thermoelectric Particles
Shunsuke Nishino, Mikio Koyano, Koichiro Suekuni, Keisuke Ohdaira
JOURNAL OF ELECTRONIC MATERIALS, 43, 6, 2151-2156, 2014
Effects of catalyst-generated atomic hydrogen treatment on amorphous silicon fabricated by Liquid-Si printing
Hiroko Murayama, Tatsushi Ohyama, Akira Terakawa, Hideyuki Takagishi, Takashi Masuda, Keisuke Ohdaira, Tatsuya Shimoda
JAPANESE JOURNAL OF APPLIED PHYSICS, 53, 5, -, 2014
Deposition of moisture barrier films by catalytic CVD using hexamethyldisilazane
Keisuke Ohdaira, Hideki Matsumura
JAPANESE JOURNAL OF APPLIED PHYSICS, 53, 5, -, 2014
Amorphous silicon carbide films prepared using vaporized silicon ink
Takashi Masuda, Zhongrong Shen, Hideyuki Takagishi, Keisuke Ohdaira, Tatsuya Shimoda
JAPANESE JOURNAL OF APPLIED PHYSICS, 53, 3, -, 2014
Formation of vertical concentration gradients in poly(3-hexylthiophene-2,5-diyl): Phenyl-C-61-butyric acid methyl ester-graded bilayer solar cells
Varun Vohra, Koichi Higashimine, Shogo Tsuzaki, Keisuke Ohdaira, Hideyuki Murata
THIN SOLID FILMS, 554, 41-45, 2014
Effect of annealing and hydrogen radical treatment on the structure of solution-processed hydrogenated amorphous silicon films
Yoo Sakuma, Keisuke Ohdaira, Takashi Masuda, Hideyuki Takagishi, Zhongrong Shen, Tatsuya Shimoda
Japanese Journal of Applied Physics, 53, 4S, 04ER07-04ER07, 2014
Passivation quality of a stoichiometric SiNx single passivation layer on crystalline silicon prepared by catalytic chemical vapor deposition and successive annealing
Trinh Cham Thi, Koichi Koyama, Keisuke Ohdaira, Hideki Matsumura
Japanese Journal of Applied Physics, 53, 2, 022301-022301, 2014
Formation of high-quality μm-order-thick Poly-Si films on glass-substrates by flash lamp annealing
Keisuke Ohdaira
Springer Series in Materials Science, 192, 173-187, 2014
Requirements for Achieving Extremely Low Surface Recombination Velocity and Negligible Optical Loss in Cat-CVD SiNx/a-Si Stacked Passivation
Koichi Koyama, Trinh Cham Thi, Koichi Higashimine, Keisuke Ohdaira, Hideki Matsumura
2014 IEEE 40TH PHOTOVOLTAIC SPECIALIST CONFERENCE (PVSC), 3304-3307, 2014
Defect Termination of Flash-Lamp-Crystallized Large-Grain Polycrystalline Silicon Films by High-Pressure Water Vapor Annealing
Keisuke Ohdaira
JAPANESE JOURNAL OF APPLIED PHYSICS, 52, 4, -, 2013
Liquid-phase explosive crystallization of electron-beam-evaporated a-Si films induced by flash lamp annealing
Keisuke Ohdaira, Hideki Matsumura
JOURNAL OF CRYSTAL GROWTH, 362, 149-152, 2013
Flash-lamp-induced explosive crystallization of amorphous germanium films leaving behind periodic microstructures
Keisuke Ohdaira, Hideki Matsumura
THIN SOLID FILMS, 524, 161-165, 2012
Effect of Radical-Doped n(+) Back Surface Field Layers on the Effective Minority Carrier Lifetimes of Crystalline Silicon with Amorphous Silicon Passivation Layers Deposited by Catalytic Chemical Vapor Deposition
Taro Hayakawa, Tatsunori Ohta, Yuki Nakashima, Koichi Koyama, Keisuke Ohdaira, Hideki Matsumura
JAPANESE JOURNAL OF APPLIED PHYSICS, 51, 10, -, 2012
Large-Grain Polycrystalline Silicon Films Formed through Flash-Lamp-Induced Explosive Crystallization
Keisuke Ohdaira, Keisuke Sawada, Noritaka Usami, Sergey Varlamov, Hideki Matsumura
JAPANESE JOURNAL OF APPLIED PHYSICS, 51, 10, -, 2012
Mechanism and control of crack generation in glass substrates during crystallization of a-Si Films by flash lamp annealing
Keisuke Ohdaira, Naohito Tomura, Shohei Ishii, Keisuke Sawada, Hideki Matsumura
JOURNAL OF NON-CRYSTALLINE SOLIDS, 358, 17, 2154-2158, 2012
Distribution of Phosphorus Atoms and Carrier Concentrations in Single-Crystal Silicon Doped by Catalytically Generated Phosphorous Radicals
Taro Hayakawa, Yuki Nakashima, Koichi Koyama, Keisuke Ohdaira, Hideki Matsumura
JAPANESE JOURNAL OF APPLIED PHYSICS, 51, 6, -, 2012
Scanning transmission electron microscope analysis of amorphous-Si insertion layers prepared by catalytic chemical vapor deposition, causing low surface recombination velocities on crystalline silicon wafers
Koichi Higashimine, Koichi Koyama, Keisuke Ohdaira, Hideki Matsumura, N. Otsuka
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 30, 3, -, 2012
Passivation characteristics of SiNx/a-Si and SiNx/Si-rich-SiNx stacked layers on crystalline silicon
Trinh Cham Thi, Koichi Koyama, Keisuke Ohdaira, Hideki Matsumura
SOLAR ENERGY MATERIALS AND SOLAR CELLS, 100, 169-173, 2012
Polycrystalline Silicon Films with Nanometer-Sized Dense Fine Grains Formed by Flash-Lamp-Induced Crystallization
Keisuke Ohdaira, Shohei Ishii, Naohito Tomura, Hideki Matsumura
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 12, 1, 591-595, 2012
Pixel controlling substrate fabricated by embedding millions of silicon ic chips in plastic substrate and self-aligned metal interconnection among such ic chips
Nguyen Thi Thanh Kieu, Takahiro Yagi, Keisuke Ohdaira, Hideki Matsumura
Digest of Technical Papers - SID International Symposium, 43, 1, 842-845, 2012
Formation of polycrystalline silicon films for solar cells by flash lamp annealing
Keisuke Ohdaira
Journal of the Vacuum Society of Japan, 55, 12, 535-540, 2012
Formation of Polycrystalline Silicon Films with mu m-Order-Long Grains through Liquid-Phase Explosive Crystallization by Flash Lamp Annealing
Keisuke Ohdaira, Sergey Varlamov, Noritaka Usami, Hideki Matsumura
2012 38TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC), 1225-1228, 2012
Low Temperature Phosphorus Doping in Silicon Using Catalytically Generated Radicals
Taro Hayakawa, Yuki Nakashima, Motoharu Miyamoto, Koichi Koyama, Keisuke Ohdaira, Hideki Matsumura
JAPANESE JOURNAL OF APPLIED PHYSICS, 50, 12, -, 2011
Flash-lamp-crystallized polycrystalline silicon films with high hydrogen concentration formed from Cat-CVD a-Si films
Keisuke Ohdaira, Naohito Tomura, Shohei Ishii, Hideki Matsumura
THIN SOLID FILMS, 519, 14, 4459-4461, 2011
Catalytic decomposition of NH3 on heated Ru and W surfaces
Hironobu Umemoto, Yuta Kashiwagi, Keisuke Ohdaira, Hiroyuki Kobayashi, Kanji Yasui
THIN SOLID FILMS, 519, 14, 4429-4431, 2011
Extremely low recombination velocity on crystalline silicon surfaces realized by low-temperature impurity doping in Cat-CVD technology
Taro Hayakawa, Motoharu Miyamoto, Koichi Koyama, Keisuke Ohdaira, Hideki Matsumura
THIN SOLID FILMS, 519, 14, 4466-4468, 2011
Advantage of plasma-less deposition in Cat-CVD to the performance of electronic devices
Hideki Matsumura, Tomoaki Hasegawa, Shogo Nishizaki, Keisuke Ohdaira
THIN SOLID FILMS, 519, 14, 4568-4570, 2011
Electrical properties of polycrystalline silicon films formed from amorphous silicon films by flash lamp annealing
Takuya Nishikawa, Keisuke Ohdaira, Hideki Matsumura
CURRENT APPLIED PHYSICS, 11, 3, 604-607, 2011
Low resistivity metal lines formed by functional liquids and successive treatment of catalytically generated hydrogen atoms in the Cat-CVD system
Nguyen Thi Thanh Kieu, Keisuke Ohdaira, Tatsuya Shimoda, Hideki Matsumura
THIN SOLID FILMS, 519, 14, 4565-4567, 2011
Excellent passivation effect of Cat-CVD SiNx/i-a-Si stack films on Si substrates
Koichi Koyama, Keisuke Ohdaira, Hideki Matsumura
THIN SOLID FILMS, 519, 14, 4473-4475, 2011
Microstructure of Polycrystalline Silicon Films Formed through Explosive Crystallization Induced by Flash Lamp Annealing
Keisuke Ohdaira, Shohei Ishii, Naohito Tomura, Hideki Matsumura
JAPANESE JOURNAL OF APPLIED PHYSICS, 50, 4, -, 2011
Drastic reduction in surface recombination velocity of crystalline silicon by surface treatment using catalytically-generated radicals
Hideki Matsumura, Motoharu Miyamoto, Koichi Koyama, Keisuke Ohdaira
SOLAR ENERGY MATERIALS AND SOLAR CELLS, 95, 2, 797-799, 2011
Frequency response of amorphous silicon photoconductors
Hideyuki Otosaka, Shingo Ebuchi, Takeo Maruyama, Koichi Iiyama, Keisuke Ohdaira, Hideki Matsumura
16th Opto-Electronics and Communications Conference, OECC 2011, 295-296, 2011
A novel method for low-resistivity metal-interconnection by using metallic functional liquids and catalytically generated hydrogen atoms
Nguyen T.T. Kieu, Keisuke Ohdaira, Tatsuya Shimoda, Hideki Matsumura
Materials Research Society Symposium Proceedings, 1401, 14-19, 2011
Low-temperature phosphorus doping to silicon using phosphorus-related radicals
Taro Hayakawa, Yuuki Nakashima, Koichi Koyama, Keisuke Ohdaira, Hideki Matsumura
Materials Research Society Symposium Proceedings, 1391, 108-113, 2011
Carrier recombination mechanisms in solar cells fabricated using flash-lamp-crystallized polycrystalline silicon films
Keisuke Ohdaira, Shohei Ishii, Naohito Tomura, Hideki Matsumura
Conference Record of the IEEE Photovoltaic Specialists Conference, 000665-000668, 2011
Lateral Crystallization Velocity in Explosive Crystallization of Amorphous Silicon Films Induced by Flash Lamp Annealing
Keisuke Ohdaira, Naohito Tomura, Shohei Ishii, Hideki Matsumura
ELECTROCHEMICAL AND SOLID STATE LETTERS, 14, 9, H372-H374, 2011
Pixel-Controlling-Substrates of FPD Fabricated by Micro-Assembling of Millions of IC Chips and Automatic Metal Interconnection among Chips
Takahiro Yagi, Nguyen Thi Thanh Kieu, Hideaki Kugai, Keisuke Ohdaira, Hideki Matsumura
IDW'11: PROCEEDINGS OF THE 18TH INTERNATIONAL DISPLAY WORKSHOPS, VOLS 1-3, 1163-1164, 2011
Variation of crystallization mechanisms in flash-lamp-irradiated amorphous silicon films
Keisuke Ohdaira, Takuya Nishikawa, Hideki Matsumura
JOURNAL OF CRYSTAL GROWTH, 312, 19, 2834-2839, 2010
Drastic suppression of the optical reflection of flash-lamp-crystallized poly-Si films with spontaneously formed periodic microstructures
Keisuke Ohdaira, Takuya Nishikawa, Kazuhiro Shiba, Hiroyuki Takemoto, Hideki Matsumura
THIN SOLID FILMS, 518, 21, 6061-6065, 2010
Extremely low surface recombination velocities on crystalline silicon wafers realized by catalytic chemical vapor deposited SiNx/a-Si stacked passivation layers
Koichi Koyama, Keisuke Ohdaira, Hideki Matsumura
APPLIED PHYSICS LETTERS, 97, 8, -, 2010
Novel technique for formation of metal lines by functional liquid containing metal nanoparticles and reduction of their resistivity by hydrogen treatment
Nguyen Thi Thanh Kieu, Keisuke Ohdaira, Tatsuya Shimoda, Hideki Matsumura
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 28, 4, 775-782, 2010
Thin-film polycrystalline silicon solar cells formed by flash lamp annealing of a-Si films
Yohei Endo, Tomoko Fujiwara, Keisuke Ohdaira, Shogo Nishizaki, Kensuke Nishioka, Hideki Matsumura
THIN SOLID FILMS, 518, 17, 5003-5006, 2010
Flash-lamp-crystallized polycrystalline silicon films with remarkably long minority carrier lifetimes
Keisuke Ohdaira, Hiroyuki Takemoto, Takuya Nishikawa, Hideki Matsumura
CURRENT APPLIED PHYSICS, 10, 3, S402-S405, 2010
Novel technique for formation of metal lines by functional liquid containing metal nanoparticles and reduction of their resistivity by hydrogen treatment
Nguyen Thi Thanh Kieu, Keisuke Ohdaira, Tatsuya Shimoda, Hideki Matsumura
Journal of Vacuum Science and Technology B:Nanotechnology and Microelectronics, 28, 4, 775-782, 2010
Advantage of plasma-less deposition: Cat-CVD fabrication of a-Si TFT with current drivability equivalent to poly-Si TFT
Hideki Matsumura, Keisuke Ohdaira, Shogo Nishizaki
Physica Status Solidi (C) Current Topics in Solid State Physics, 7, 3-4, 1132-1135, 2010
Investigation of Cat-CVD amorphous silicon film properties under high catalyzer temperature
K. H. Yen, S. Nishizaki, K. Ohdaira, H. Matsumura, Y. T. Huang, H. W. Zan, C. C. Tsai
PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 7 NO 3-4, 7, 3-4, 583-587, 2010
Effects of high nitrogen pressure and thermal treatment on adhesion to amorphous silicon/ Silicon Nitride/Polyethersulfone substrate during excimer laser annealing
Akira Heya, Shogo Nishizaki, Naoya Kawamoto, Keisuke Ohdaira, Hideki Matsumura, Naoto Matsuo
Journal of the Vacuum Society of Japan, 53, 11, 692-695, 2010
Selection of Material for the Back Electrodes of Thin-Film Solar Cells Using Polycrystalline Silicon Films Formed by Flash Lamp Annealing
Keisuke Ohdaira, Tomoko Fujiwara, Yohei Endo, Kazuhiro Shiba, Hiroyuki Takemoto, Hideki Matsumura
JAPANESE JOURNAL OF APPLIED PHYSICS, 49, 4, -, 2010
Propagation Loss of Amorphous Silicon Optical Waveguides at the 0.8 mu m-Wavelength Range
Takahiro Asukai, Makoto Inamoto, Takeo Maruyama, Koichi Iiyama, Keisuke Ohdaira, Hideki Matsumura
2010 7TH IEEE INTERNATIONAL CONFERENCE ON GROUP IV PHOTONICS (GFP), 269-271, 2010
CARRIER TRANSPORT PROPERTIES OF FLASH-LAMP-CRYSTALLIZED POLY-SI FILMS
Keisuke Ohdaira, Takuya Nishikawa, Shohei Ishii, Naohito Tomura, Hideki Matsumura
35TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE, 3726-3728, 2010
Polycrystalline Si films with unique microstructures formed from amorphous Si films by non-thermal equilibrium flash lamp annealing
Keisuke Ohdaira, Takuya Nishikawa, Kazuhiro Shiba, Hiroyuki Takemoto, Hideki Matsumura
PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 7 NO 3-4, 7, 3-4, 604-607, 2010
Complementary Metal-Oxide-Semiconductor Ion-Sensitive Field-Effect Transistor Sensor Array with Silicon Nitride Film Formed by Catalytic Chemical Vapor Deposition as an Ion-Sensitive Membrane
Yuji Kagohashi, Hiroaki Ozawa, Shigeyasu Uno, Kazuo Nakazato, Keisuke Ohdaira, Hideki Matsumura
JAPANESE JOURNAL OF APPLIED PHYSICS, 49, 1, -, 2010
Advantage of plasma-less deposition: Cat-CVD fabrication of a-Si TFT with current drivability equivalent to poly-Si TFT
Hideki Matsumura, Keisuke Ohdaira, Shogo Nishizaki
PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 7 NO 3-4, 7, 3-4, 1132-1135, 2010
SURFACE TREATMENT OF CRYSTALLINE SILICON REALIZING EXTREMELY LOW SURFACE RECOMBINATION VELOCITY USING CATALYTICALLY GENERATED RADICALS
Keisuke Ohdaira, Motoharu Miyamoto, Koichi Koyama, Hideki Matsumura
35TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE, 3220-3222, 2010
Explosive crystallization of amorphous silicon films by flash lamp annealing
Keisuke Ohdaira, Tomoko Fujiwara, Yohei Endo, Shogo Nishizaki, Hideki Matsumura
Journal of Applied Physics, 106, 4, 044907-044907, 2009
Drastic Improvement of Minority Carrier Lifetimes Observed in Hydrogen-Passivated Flash-Lamp-Crystallized Polycrystalline Silicon Films
Keisuke Ohdaira, Hiroyuki Takemoto, Kazuhiro Shiba, Hideki Matsumura
APPLIED PHYSICS EXPRESS, 2, 6, -, 2009
New application of Cat-CVD technology and recent status of industrial implementation
Hideki Matsumura, Keisuke Ohdaira
THIN SOLID FILMS, 517, 12, 3420-3423, 2009
Comparison of a-Si TFTs fabricated by Cat-CVD and PECVD methods
Shogo Nishizaki, Keisuke Ohdaira, Hideki Matsumura
THIN SOLID FILMS, 517, 12, 3581-3583, 2009
Precursor Cat-CVD a-Si films for the formation of high-quality poly-Si films on glass substrates by flash lamp annealing
Keisuke Ohdaira, Kazuhiro Shiba, Hiroyuki Takemoto, Tomoko Fujiwara, Yohei Endo, Shogo Nishizaki, Young Rae Jang, Hideki Matsumura
THIN SOLID FILMS, 517, 12, 3472-3475, 2009
A novel patterning technique using super-hydrophobic PTFE thin films by Cat-CVD method
Michihisa Takachi, Hiroaki Yasuoka, Keisuke Ohdaira, Tatsuya Shimoda, Hideki Matsumura
THIN SOLID FILMS, 517, 12, 3622-3624, 2009
Formation of micrometer-order-thick poly-Si films on textured glass substrates by flash lamp annealing of a-Si films prepared by catalytic chemical vapor deposition
K. Ohdaira, T. Fujiwara, Y. Endo, K. Nishioka, H. Matsumura
JOURNAL OF CRYSTAL GROWTH, 311, 3, 769-772, 2009
Cat-CVD (Catalytic-CVD); Its Fundamentals and Application
Hideki Matsumura, Keisuke Ohdaira
EUROCVD 17 / CVD 17, 25, 8, 53-63, 2009
IMPROVED PERFORMANCE OF THIN-FILM SOLAR CELLS USING SURFACE-MORPHOLOGY-CONTROLLED POLY-SI FILMS CRYSTALLIZED BY FLASH LAMP ANNEALING
Keisuke Ohdaira, Hiroyuki Takemoto, Kazuhiro Shiba, Takuya Nishikawa, Koichi Koyama, Hideki Matsumura
2009 34TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE, VOLS 1-3, 422-425, 2009
Study on Stability of Amorphous Silicon Thin-Film Transistors Prepared by Catalytic Chemical Vapor Deposition
Shogo Nishizaki, Keisuke Ohdaira, Hideki Matsumura
JAPANESE JOURNAL OF APPLIED PHYSICS, 47, 12, 8700-8706, 2008
Formation of Several-Micrometer-Thick Polycrystalline Silicon Films on Soda Lime Glass by Flash Lamp Annealing
Keisuke Ohdaira, Tomoko Fujiwara, Yohei Endo, Shogo Nishizaki, Hideki Matsumura
JAPANESE JOURNAL OF APPLIED PHYSICS, 47, 11, 8239-8242, 2008
Antireflection subwavelength structure of silicon surface formed by wet process using catalysis of single nano-sized gold particle
Kensuke Nishioka, Susumu Horita, Keisuke Ohdaira, Hideki Matsumura
SOLAR ENERGY MATERIALS AND SOLAR CELLS, 92, 8, 919-922, 2008
Investigation of surface treatment effect of catalyst on the lifetime for Cat-CVD method
Kazuhiro Honda, Keisuke Ohdaira, Hideki Matsumura
JOURNAL OF NON-CRYSTALLINE SOLIDS, 354, 19-25, 2117-2120, 2008
Study of Silicidation Process of Tungsten Catalyzer during Silicon Film Deposition in Catalytic Chemical Vapor Deposition
Kazuhiro Honda, Keisuke Ohdaira, Hideki Matsumura
JAPANESE JOURNAL OF APPLIED PHYSICS, 47, 5, 3692-3698, 2008
Formation of High-quality Poly-Si Films by Flash Lamp Annealing
OHDAIRA Keisuke
Bulletin of the Japan Institute of Metals, 47, 2, 89-92, 2008
Fabrication of PTFE thin films by dual catalytic chemical vapor deposition method
Hiroaki Yasuoka, Masahiro Yoshida, Ken Sugita, Keisuke Ohdaira, Hideyuki Murata, Hideki Matsumura
THIN SOLID FILMS, 516, 5, 687-690, 2008
Formation of gas barrier films by Cat-CVD method using organic silicon compounds
Takuya Oyaidu, Yohei Ogawa, Kazuhiko Tsurumaki, Keisuke Ohdaira, Hideki Matsumura
THIN SOLID FILMS, 516, 5, 604-606, 2008
Poly-Si films with long carrier lifetime prepared by rapid thermal annealing of Cat-CVD amorphous silicon thin films
Keisuke Ohdaira, Yuki Abe, Makoto Fukuda, Shogo Nishizaki, Noritaka Usami, Kazuo Nakajima, Takeshi Karasawa, Tetsuya Torikai, Hideki Matsumura
THIN SOLID FILMS, 516, 5, 600-603, 2008
Protection of organic light-emitting diodes over 50000 hours by Cat-CVD SiNx/SiOxNy stacked thin films
Yohei Ogawa, Keisuke Ohdaira, Takuya Oyaidu, Hideki Matsumura
THIN SOLID FILMS, 516, 5, 611-614, 2008
A novel method for suppressing silicidation of tungsten catalyzer during silane decomposition in Cat-CVD
Kazuhiro Honda, Keisuke Ohdaira, Hideki Matsumura
THIN SOLID FILMS, 516, 5, 826-828, 2008
Recent situation of industrial implementation of Cat-CVD technology in Japan
Hideki Matsumura, Keisuke Ohdaira
THIN SOLID FILMS, 516, 5, 537-540, 2008
THIN FILM P-I-N POLY-SI SOLAR CELLS DIRECTLY CONVERTED FROM P-I-N A-SI STRUCTURES BY A SINGLE SHOT OF FLASH LAMP
Keisuke Ohdaira, Tomoko Fujiwara, Yohei Endo, Kazuhiro Shiba, Hiroyuki Takemoto, Shogo Nishizaki, Young Rae Jang, Kensuke Nishioka, Hideki Matsumura
PVSC: 2008 33RD IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE, VOLS 1-4, 1690-1692, 2008
Formation of highly uniform micrometer-order-thick polycrystalline silicon films by flash lamp annealing of amorphous silicon on glass substrates
Keisuke Ohdaira, Yohei Endo, Tomoko Fujiwara, Shogo Nishizaki, Hideki Matsumura
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 46, 12, 7603-7606, 2007
High-quality polycrystalline silicon films with minority carrier lifetimes over 5 mu s formed by flash lamp annealing of precursor amorphous silicon films prepared by catalytic chemical vapor deposition
Keisuke Ohdaira, Shogo Nishizaki, Yohei Endo, Tomoko Fujiwara, Noritaka Usami, Kazuo Nakajima, Hideki Matsumura
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 46, 11, 7198-7203, 2007
Relationship between textured structure of substrates and defect density of catalytic chemical vapor deposition amorphous silicon films
Ken Sugita, Koichi Koyama, Keisuke Ohdaira, Hideki Matsumura
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 46, 5A, 2852-2857, 2007
Improvement in the conversion efficiency of single-junction SiGe solar cells by intentional introduction of the compositional distribution
Misumi Tayanagi, Noritaka Usami, Wugen Pan, Keisuke Ohdaira, Kozo Fujiwara, Yoshitaro Nose, Kazuo Nakajima
JOURNAL OF APPLIED PHYSICS, 101, 5, -, 2007
Effect of the compositional distribution on the photovoltaic power conversion of SiGe solar cells
Noritaka Usami, Wugen Pan, Kozo Fujiwara, Misumi Tayanagi, Keisuke Ohdaira, Kazuo Nakajima
SOLAR ENERGY MATERIALS AND SOLAR CELLS, 91, 2-3, 123-128, 2007
Study on a new fabrication technology of poly-Si TFT by direct conversion from a-Si TFT
Shogo Nishizaki, Yohei Endo, Tomoko Fujiwara, Keisuke Ohdaira, Hideki Matsumura
IDW '07: PROCEEDINGS OF THE 14TH INTERNATIONAL DISPLAY WORKSHOPS, VOLS 1-3, 1853-1856, 2007
Influence of stacked Ge islands on the dark current-voltage characteristics and the conversion efficiency of the solar cells
A Alguno, N Usami, K Ohdaira, WG Pan, M Tayanagi, K Nakajima
THIN SOLID FILMS, 508, 1-2, 402-405, 2006
High-efficiency concave and conventional solar cell integration system using focused reflected light
K Ohdaira, K Fujiwara, W Pan, N Usami, K Nakajiima
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 45, 3A, 1664-1667, 2006
Pixel controlling substrates using crystalline silicon LSI chips embedded in flexible organic films
R. Ishizuka, M. Ishikawa, K. Ohdaira, H. Matsumura
IDW '06: PROCEEDINGS OF THE 13TH INTERNATIONAL DISPLAY WORKSHOPS, VOLS 1-3, 681-+, 2006
Study on stability of a-Si TFT fabricated by catalytic chemical vapor deposition (Cat-CVD) method
Shogo Nishizaki, Keisuke Ohdaira, Hideki Matsumura
IDW '06: PROCEEDINGS OF THE 13TH INTERNATIONAL DISPLAY WORKSHOPS, VOLS 1-3, 699-702, 2006
Analysis of the dark-current density in solar cells based on multicrystalline SiGe
K Ohdaira, N Usami, WG Pan, K Fujiwara, K Nakajima
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 44, 11, 8019-8022, 2005
Magneto-photoluminescence studies of AlInAs/AlGaAs self-assembled quantum dots with type-II band alignment
K Ohdaira, K Ono, K Uchida, S Koh, N Miura, Y Shiraki
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 73, 2, 480-484, 2004
Observation of negatively charged excitons and excited states of multi-excitons in quantum dots embedded in modulation doping structures
K Ohdaira, N Usami, K Ota, Y Shiraki
PHYSICA E, 11, 2-3, 68-71, 2001
On the origin of the drastic enhancement of the no-phonon transition in GaAsP/GaP indirect quantum wells with an ultrathin AIP layer
K Sawano, M Ikeda, K Ohdaira, K Arimoto, Y Shiraki
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, 39, 3, 440-442, 2001
Formation of negatively-charged excitons and control of exciton charging states in quantum dots
K Ohdaira, N Usami, K Ota, Y Shiraki
PROCEEDINGS OF THE 25TH INTERNATIONAL CONFERENCE ON THE PHYSICS OF SEMICONDUCTORS, PTS I AND II, 87, 1155-1156, 2001
Microscopic probing of localized excitons in quantum wells
N Usami, K Ota, K Ohdaira, Y Shiraki, T Hasche, Lyssenko, V, K Leo
COMPOUND SEMICONDUCTORS 1999, 166, 99-102, 2000
Absolute measurement of second-order nonlinear-optical coefficients of β-BaB2O4 for visible to ultraviolet second-harmonic wavelengths
Ichiro Shoji, Hirotaka Nakamura, Keisuke Ohdaira, Takashi Kondo, Ryoichi Ito, Tsutomu Okamoto, Koichi Tatsuki, Shigeo Kubota
Journal of the Optical Society of America B: Optical Physics, 16, 4, 620-624, 1999