%0 Conference Paper %B 2014 IEEE 40th Photovoltaic Specialist Conference (PVSC) %D 2014 %T Recent R&D progress in solar frontier's small-sized Cu (InGa)(SeS)2 solar cells %A Nakamura, Motoshi %A Yoneyama, Nobutaka %A Horiguchi, Kyouhei %A Iwata, Yasuaki %A Yamaguchi, Koji %A Sugimoto, Hiroki %A Kato, Takuya %B 2014 IEEE 40th Photovoltaic Specialist Conference (PVSC) %I IEEE %G eng