@article{CTT100791847,
  author = {Takeshi Umehara and Faris Akira Bin Mohd Zulkifly and Kazuyoshi Nakada and Akira Yamada},
  title = {Conduction band offset engineering in wide-bandgap Ag(In,Ga)Se2 solar cells by hybrid buffer layer},
  journal = {JPN. J. APPL. PHYS.},
  year = 2017,
}

@article{CTT100737161,
  author = {Takeshi  Umehara and Kazuyoshi Nakada and Akira Yamada},
  title = {Impact of roll-over-shaped current–voltage characteristics and device properties of Ag(In,Ga)Se 2 solar cells},
  journal = {Jpn. J. Appl. Phys.},
  year = 2016,
}

@article{CTT100737139,
  author = {Takeshi Umehara and Shohei Iinuma and Akira Yamada},
  title = {Investigation of the effects of rear surface recombination on the Cu(In,Ga)Se2 solar cell performances},
  journal = {Electronic Materials Letters},
  year = 2016,
}

@inproceedings{CTT100791842,
  author = {Takumi Kobayashi and Takeshi Umehara and Shigeru Yamada and Kazuyoshi Nakada and Akira Yamada},
  title = {Analysis of Crystal Growth and Diffusion Process in Chalcopyrite Photovoltaic Materials},
  booktitle = {},
  year = 2017,
}

@inproceedings{CTT100791836,
  author = {Takumi Kobayashi and Takeshi Umehara and Shigeru Yamada and Kazuyoshi Nakada and Akira Yamada},
  title = {Analyisis of Crystal Growth and Diffusion Process in Chalcopyrite Photovoltaic Materials},
  booktitle = {},
  year = 2017,
}

@inproceedings{CTT100791832,
  author = {山田 繁 and 梅原 猛 and 小林 拓己 and 中田 和吉 and 山田 明},
  title = {アルカリ処理によるAg(In,Ga)Se2薄膜太陽電池の高効率化},
  booktitle = {},
  year = 2017,
}

@inproceedings{CTT100737146,
  author = {Takeshi Umehara and Lei Meng and Takumi Kobayashi and Keisuke Isowaki and Suehiro Kawamura and Shin'ichi Takagi and Kenta Kawasaki and Norio Terada and Akira Yamada},
  title = {High Efficiency Ag(In,Ga)Se2 Thin Film Solar Cells by Hybrid Buffer Layer},
  booktitle = {},
  year = 2016,
}

@inproceedings{CTT100737152,
  author = {梅原 猛 and 小林 拓己 and 中田 和吉 and 山田 明},
  title = {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},
  booktitle = {},
  year = 2016,
}

@inproceedings{CTT100724945,
  author = {Takeshi Umehara and Shohei Iinuma and Akira Yamada},
  title = {Band profile design of Cu(In,Ga)Se2 solar cells by considering the rear surface recombination},
  booktitle = {},
  year = 2015,
}

@inproceedings{CTT100724943,
  author = {Takeshi Umehara and Shohei Iinuma and Yasuyoshi Kurokawa and Akira Yamada},
  title = {Investigation of the effects of rear surface recombination on the Cu(In,Ga)Se2 solar cell performances},
  booktitle = {},
  year = 2015,
}

@inproceedings{CTT100678917,
  author = {T. Umehara and S. Iinuma and Y. Kurokawa and A. Yamada},
  title = {Solution of Roll-over-Shaped J-V Characteristics of Ag(In,Ga)Se2 Solar Cells},
  booktitle = {},
  year = 2014,
}

@inproceedings{CTT100678782,
  author = {飯沼 祥平 and 梅原 猛 and 黒川 康良 and 山田 明},
  title = {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},
  booktitle = {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},
  year = 2014,
}

@inproceedings{CTT100669097,
  author = {梅原猛 and 飯沼祥平 and 黒川康良 and 山田明},
  title = {Ag(In,Ga)Se2薄膜太陽電池の高効率化に向けた研究},
  booktitle = {},
  year = 2014,
}

@inproceedings{CTT100669086,
  author = {Akira Yamada and Takeshi Umehara and Dongduong Nguyenphuc and Satoshi Onishi and Yoshiaki Hirai and Shunsuke Kasashima and Yasuyoshi Kurokawa},
  title = {Towards Realization of Thin-Film Full Supectrum Solar Cells using Chalcopyrite-Based Solar Cells},
  booktitle = {},
  year = 2014,
}

@inproceedings{CTT100663753,
  author = {梅原猛},
  title = {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},
  booktitle = {シンポジウム予稿集},
  year = 2013,
}

@inproceedings{CTT100663381,
  author = {梅原猛 and 黒川康良 and 宮島晋介 and 山田明},
  title = {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},
  booktitle = {},
  year = 2013,
}

@inproceedings{CTT100643127,
  author = {Zhang Xianfeng and Takeshi Umehara and Yasuyoshi Kurokawa and Akira Yamada},
  title = {Improvement of Ag(In, Ga)Se2 Solar Cell Performance by High-Temperature Deposition Method},
  booktitle = {},
  year = 2012,
}

@misc{CTT100749831,
  author = {Takeshi Umehara},
  title = {Study of high efficiency wide-bandgap Ag(In,Ga)Se2 solar cells},
  year = 2017,
}

@misc{CTT100749833,
  author = {Takeshi Umehara},
  title = {Study of high efficiency wide-bandgap Ag(In,Ga)Se2 solar cells},
  year = 2017,
}

@misc{CTT100749832,
  author = {Takeshi Umehara},
  title = {Study of high efficiency wide-bandgap Ag(In,Ga)Se2 solar cells},
  year = 2017,
}

@misc{CTT100776959,
  author = {Takeshi Umehara},
  title = {Study of high efficiency wide-bandgap Ag(In,Ga)Se2 solar cells},
  year = 2017,
}



@phdthesis{CTT100749831,
  author = {Takeshi Umehara},
  title = {Study of high efficiency wide-bandgap Ag(In,Ga)Se2 solar cells},
  school = {東京工業大学},
  year = 2017,
}

@phdthesis{CTT100749833,
  author = {Takeshi Umehara},
  title = {Study of high efficiency wide-bandgap Ag(In,Ga)Se2 solar cells},
  school = {東京工業大学},
  year = 2017,
}

@phdthesis{CTT100749832,
  author = {Takeshi Umehara},
  title = {Study of high efficiency wide-bandgap Ag(In,Ga)Se2 solar cells},
  school = {東京工業大学},
  year = 2017,
}

@phdthesis{CTT100776959,
  author = {Takeshi Umehara},
  title = {Study of high efficiency wide-bandgap Ag(In,Ga)Se2 solar cells},
  school = {東京工業大学},
  year = 2017,
}