期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 4, 期 5, 页码 1708-1713出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta08614k
关键词
-
资金
- Ministry of Science and Technology of China [2014CB643501]
- NSFC [21325419, 51373181, 91333204]
- Chinese Academy of Science [XDB12030200, KJZD-EW-J01]
In this study, a regioregular copolymer (PBDT-TSR) based on alkythio-substituted two dimensional conjugated benzodithiophene (2D-BDT) and asymmetric thienothiophene (TT) was synthesized through two steps. Compared with its random counterpart PBDT-TS1, the PBDT-TSR shows improved absorption properties and enhanced inter-chain pi-pi packing effects. The hole mobility of PBDT-TSR is higher than that of PBDT-TS1. What's more, the enhancement of regioregularity does not have great influence on its molecular energy levels of the polymer and its miscibility with the acceptor material, PC71BM. The polymer solar cell (PSC) device fabricated by using PBDT-TSR shows a high power conversion efficiency of 10.2% with a short-circuit current density (J(SC)) of 17.99 mA cm(-2), while the PBDT-TS1 shows a PCE of 9.74%. Overall, these results suggest that it is of great importance to investigate the influence of backbone configuration on photovoltaic performance for high efficiency conjugated polymers based on asymmetric conjugated building blocks, and to improve the regioregularity of this type of polymer should be a feasible approach to enhance their photovoltaic properties.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据