期刊
DYES AND PIGMENTS
卷 123, 期 -, 页码 16-25出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2015.07.020
关键词
Isomer; Non-fullerene acceptor; Spirobifluorene; Polymer solar cell; Solution process; Fullerene free
资金
- National Natural Science Foundation of China [91433114, 21025418, 51261130582]
- 973 Program [2011CB808401]
Two spirobifluorene-based isomeric acceptors (SBF1 and SBF2) with electron-withdrawing 1,1-dicyanomethylene-3-indanone as end groups were theoretically studied, synthesized and applied as electron acceptors for solution-processed polymer solar cells (PSCs). SBF1 possessed three-dimensional molecular structure while SBF2 was more planar. The effect of molecular configuration on absorption, energy level, charge transport, morphology and PSC performance was investigated. These molecules exhibited good thermal stability with decomposition temperatures of 345-348 degrees C, broad absorption in visible region (400-650 nm), and proper HOMO (-5.96 to -5.94 eV) and LUMO (-3.86 to -3.78 eV) energy levels. The mobility of SBF2 (7.2 x 10(-4) cm(2) V-1 s(-1)) was one order of magnitude higher than that of SBF1 (6.1 x 10(-5) cm(2) V-1 s(-1)). When blending with low-bandgap polymer donor PBDITT-C-T, the power conversion efficiencies of SBF2-based PSCs were ca. 50% higher than those of SBF1-based devices. (C) 2015 Elsevier Ltd. All rights reserved.
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