"Takumi Kobayashi,Takeshi Umehara,Shigeru Yamada,Kazuyoshi Nakada,Akira Yamada","Analysis of Crystal Growth and Diffusion Process in Chalcopyrite Photovoltaic Materials","Top-PV 2017",,,,,,2017,Nov.
"Takumi Kobayashi,Takeshi Umehara,Shigeru Yamada,Kazuyoshi Nakada,Akira Yamada","Analyisis of Crystal Growth and Diffusion Process in Chalcopyrite Photovoltaic Materials","27th International Photovoltaic Science and Engineering Conference (PVSEC-27)",,,,,,2017,Nov.
"Takeshi Umehara","Study of high efficiency wide-bandgap Ag(In,Ga)Se2 solar cells",,,,,,,2017,Sept.
"Takeshi Umehara","Study of high efficiency wide-bandgap Ag(In,Ga)Se2 solar cells",,,,,,,2017,Sept.
"Takeshi Umehara","Study of high efficiency wide-bandgap Ag(In,Ga)Se2 solar cells",,,,,,,2017,Sept.
"山田 繁,梅原 猛,小林 拓己,中田 和吉,山田 明","アルカリ処理によるAg(In,Ga)Se2薄膜太陽電池の高効率化","第78回応用物理学会秋季学術講演会",,,,,,2017,Sept.
"Takeshi Umehara","Study of high efficiency wide-bandgap Ag(In,Ga)Se2 solar cells",,,,,,,2017,Sept.
"Takeshi Umehara,Faris Akira Bin Mohd Zulkifly,Kazuyoshi Nakada,Akira Yamada","Conduction band offset engineering in wide-bandgap Ag(In,Ga)Se2 solar cells by hybrid buffer layer",,"JPN. J. APPL. PHYS.",,"Vol. 56",,"  08MC09",2017,July
"Takeshi  Umehara,Kazuyoshi Nakada,Akira Yamada","Impact of roll-over-shaped current?voltage characteristics and device properties of Ag(In,Ga)Se 2 solar cells",,"Jpn. J. Appl. Phys.",,"Vol. 56",,"  012302-1?012302-5",2016,Dec.
"Takeshi Umehara,Lei Meng,Takumi Kobayashi,Keisuke Isowaki,Suehiro Kawamura,Shin'ichi Takagi,Kenta Kawasaki,Norio Terada,Akira Yamada","High Efficiency Ag(In,Ga)Se2 Thin Film Solar Cells by Hybrid Buffer Layer","26th International Photovoltaic Science and Engineering Conference (PVSEC-26)",,,,,,2016,Oct.
"梅原 猛,小林 拓己,中田 和吉,山田 明","ハイブリッドバッファ層導入による高バンドギャップ・高効率Ag(In,Ga)Se2薄膜太陽電池の開発","第77回応用物理学会秋季学術講演会",,,,,,2016,Sept.
"Takeshi Umehara,Shohei Iinuma,Akira Yamada","Investigation of the effects of rear surface recombination on the Cu(In,Ga)Se2 solar cell performances",,"Electronic Materials Letters",,"Vol. 12","No. 4","pp. 479-483",2016,July
"Takeshi Umehara,Shohei Iinuma,Akira Yamada","Band profile design of Cu(In,Ga)Se2 solar cells by considering the rear surface recombination","The Fourth International Education Forum on Environment and Energy Science",,,,,,2015,Dec.
"Takeshi Umehara,Shohei Iinuma,Yasuyoshi Kurokawa,Akira Yamada","Investigation of the effects of rear surface recombination on the Cu(In,Ga)Se2 solar cell performances","25th International photovoltaic science & engineering conference global photovoltaic conference",,,,,,2015,Nov.
"T. Umehara,S. Iinuma,Y. Kurokawa,A. Yamada","Solution of Roll-over-Shaped J-V Characteristics of Ag(In,Ga)Se2 Solar Cells","29th European Photovoltaic Solar Energy Conference and Exhibition",,,,,,2014,Sept.
"飯沼 祥平,梅原 猛,黒川 康良,山田 明","薄膜引き剥がし法とACホール測定法によるカルコパイライト系薄膜の電気的特性評価","第11回「次世代の太陽光発電システム」","第11回「次世代の太陽光発電システム」シンポジウム予稿集",,,,"  143-144",2014,July
"梅原猛,飯沼祥平,黒川康良,山田明","Ag(In,Ga)Se2薄膜太陽電池の高効率化に向けた研究","第61回応用物理学会 春季学術講演会",,,,,,2014,Mar.
"Akira Yamada,Takeshi Umehara,Dongduong Nguyenphuc,Satoshi Onishi,Yoshiaki Hirai,Shunsuke Kasashima,Yasuyoshi Kurokawa","Towards Realization of Thin-Film Full Supectrum Solar Cells using Chalcopyrite-Based Solar Cells","6th International Symposium on Innovative Solar Cells",,,,,,2014,Jan.
"梅原猛","インピーダンス分光法によるカルコパイライト系太陽電池の評価","学振175委員会 第10回「次世代の太陽光発電システム」シンポジウム","シンポジウム予稿集",,,,,2013,May
"梅原猛,黒川康良,宮島晋介,山田明","インピーダンス分光法によるカルコパイライト系太陽電池の評価","第60回応用物理学会春季学術講演会",,,,,"  28p-G4-8",2013,Mar.
"Zhang Xianfeng,Takeshi Umehara,Yasuyoshi Kurokawa,Akira Yamada","Improvement of Ag(In, Ga)Se2 Solar Cell Performance by High-Temperature Deposition Method","Korea-Japan Top University League Workshop on Photovoltaics 2012 (TOP-PV 2012)",,,,,,2012,Aug.