@article{CTT100715407,
  author = {Homare Hiroi and Yasuaki Iwata and Hiroki Sugimoto and akira yamada},
  title = {Progress Toward 1000-mV Open-Circuit Voltage on Chalcopyrite Solar Cells},
  journal = {IEEE Journal of Photovoltaics},
  year = 2016,
}

@article{CTT100711930,
  author = {Homare Hiroi and Yasuaki Iwata and Hiroki Sugimoto and AKIRA YAMADA},
  title = {New world record efficiency for pure-sulfide Cu(In,Ga)S2 thin-film solar cell with Cd-free buffer layer via KCN-free process},
  journal = {IEEE Journal of Photovoltaics},
  year = 2016,
}

@inproceedings{CTT100748638,
  author = {Homare Hiroi and Yasuaki Iwata and Hiroki Sugimoto and Akira Yamada},
  title = {Over 16% efficiency of Se-free Cu(In,Ga)S2 solar cell},
  booktitle = {},
  year = 2017,
}

@inproceedings{CTT100733814,
  author = {Homare Hiroi and Yasuaki Iwata and Kyouhei Horiguchi and Hiroki Sugimoto and Akira Yamada},
  title = {New Challenge in Se-free Cu(In,Ga)S2 Solar Cells},
  booktitle = {},
  year = 2016,
}

@inproceedings{CTT100715386,
  author = {Homare Hiroi and yasuaki Iwata and Hiroki Sugimoto and Akira Yamada},
  title = {Investigation of Se-free (Ag,Cu)(In,Ga)S2 solar cells},
  booktitle = {},
  year = 2016,
}

@inproceedings{CTT100715403,
  author = {廣井誉 and 岩田 恭彰 and 杉本 広紀 and 山田 明},
  title = {セレンフリーCu(In,Ga)S2薄膜太陽電池の変換効率改善},
  booktitle = {},
  year = 2016,
}