元ROEL 博士研究員で現在、中国太原理工大学の王助教授 (Prof. Zhongqiang Wang) との逆構造型有機薄膜太陽電池に関する共同研究論文「Rubrene-based interfacial engineering toward enhanced performance in inverted polymer solar cells」と題する論文がElsevier の Organic Electronics (IF: 3.399) に掲載されました。王先生、おめでとうございます！
Title: Rubrene-based interfacial engineering toward enhanced performance in inverted polymer solar cells
By Z. Wang*, T. Sano*, T. Zhuang, X.-F. Wang, H. Sasabe, Junji Kido, Org. Electron. 2017, 50, 191–197.
Abstract: Rubrene, an organic semiconductor having stable fused-ring molecular structure was used as a double interfacial layer in inverted organic solar cells. When a thin, 3 nm-thick layer of rubrene was introduced between a MoO3-based hole-collecting layer and a bulk-heterojunction (BHJ) photo-active layer consisting of poly{4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b']dithiophene-2,6-diyl-alt-3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophene-4,6-diyl} (PTB7) and [6,6]-phenyl C71-butyric acid methyl ester (PC71BM), the power conversion efficiency was improved over 12% (from 7.2% to 8.1%). It was demonstrated that the insertion of thin rubrene layer showed suppressed exciton quenching and improved exciton dissociation, resulting in more efficient charge carrier collection and weaker charge recombination, thus improving the device performance.
