An Obvious Improvement in the Performance of Ternary Organic Solar Cells with "Guest" Donor Present at the "Host" Donor/Acceptor Interface
Peng-Qing Bi, Bo Wu, Fei Zheng, Wei-Long Xu, Xiao-Yu Yang, Lin Feng, Furong Zhu, Xiao-Tao Hao
ACS APPLIED MATERIALS & INTERFACES | AMER CHEMICAL SOC | Published : 2016
A small-molecule material, 7,7-(4,4-bis(2-ethylhexyl)-4H-silolo[3,2-b:4,5-b']dithiophene-2,6-diyl)bis(6-fluoro-4-(5'-hexyl-[2,2'-bithiophen]-5-yl)benzo-[c] [1,2,5]thiadiazole) (p-DTS(FBTTH2)2), was used to modify the morphology and electron-transport properties of the polymer blend of poly(3-hexythiophene) (P3HT) and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) bulk heterojunctions. As a result, a 24% increase in the power-conversion efficiency (PCE) of the p-DTS(FBTTH2)2:P3HT:PC71BM ternary organic solar cells (OSCs) is obtained. The improvement in the performance of OSCs is attributed to the constructive energy cascade path in the ternary system that benefits an efficient Förster re..View full abstract
Awarded by National Natural Science Foundation of China
Awarded by Research Fund for the Doctoral Program of Higher Education
Awarded by Research Grants Council of Hong Kong Special Administrative Region, China
This work was supported by the National Natural Science Foundation of China (No.11574181, 61275037), Research Fund for the Doctoral Program of Higher Education (Grant No. 20130131110004), the "National Young 1000 Talents" Program of China, and Research Grants Council of Hong Kong Special Administrative Region, China, Project No. T23-713/11, GRF/12303114.