四川大学からの留学生 Daobin Yang君、M2 五十嵐司君の非対称SQを用いた有機薄膜太陽電池の論文が ACS Applied Materials & Interfaces にアクセプトされ、オンライン掲載されました。Yang君、司おめでとう！
Asymmetrical Squaraines Bearing Fluorine-Substituted Indoline Moieties for High-Performance Solution-Processed Small Molecular Organic Solar Cells
Daobin Yang, Lin Yang, Yan Huang, Yan Jiao, Tsukasa Igarashi, Yao Chen, Zhiyun Lu, Xuemei Pu, Hisahiro Sasabe, and Junji Kido, ACS Applied Materials & Interfaces, 2015, accepted.
Abstract: Two novel asymmetrical squaraines based on indoline unit, ASQ-5-F and ASQ-5-DF, with one and two fluorine-substituent, have been developed to investigate the effect of fluorine-substituted on the bulk-heterojunction small molecular organic solar cells. In comparison with non-fluorine-substituted ASQ-5, both the fluorine-substituted ASQ-5-F and ASQ-5-DF possess an analogous absorption band-gaps but a 0.05 and 0.10 eV lowered HOMO energy levels, respectively. Single crystal analysis exhibit that ASQ-5-DF shows more desirable intermolecular packing patterns for hole-carrier collection than that of ASQ-5, hence higher hole mobility could be acquired. Therefore, solution-processed bulk- heterojunction small molecular organic solar cells fabricated with ASQ-5-F/PC71BM and ASQ-5-DF/PC71BM blend exhibit extremely higher PCE (5.0% and 6.0%, respectively) than that of ASQ-5/PC71BM (4.5%). The much improved PCE could be attributed to the simultaneously enhanced Voc, Jsc and FF relative to those of the ASQ-5-based device. To our knowledge, this is the highest PCE (6.0%) among squaraines-based solution- processed BHJ OSCs, and the highest PCE in OSCs based on fluorinated on the donor segment of small molecules.
