2012.12.20 The 4th Asian Conference on Organic Electronics (A-COE)/Organic p-i-n photovoltaic cells using tetraphenyldibenzo-periflanthene and fullerene C70（Zhongqiang Wang, Daisuke Yokoyama, Xiao-Feng Wang, Zirou Hong, Takeshi Sano, Yang Yang, Junji Kido）