期刊
CHEMISTRY OF MATERIALS
卷 31, 期 17, 页码 6484-6490出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.8b04668
关键词
-
资金
- NSFC [21875182, 21534003, 21734001, 51761165023]
- Ministry of Science and Technology [2016YFA0200700]
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC0205CH11231]
A new mid-bandgap nonfullerene acceptor, FPIC, is designed and synthesized on the basis of a novel fused-pyrene electron-donating core. FPIC exhibits intense light absorption between 500 and 750 nm, with a maximum molar extinction coefficient of 2.3 x 10(5) M-1 cm(-1) at 645 nm, a medium optical bandgap of 1.63 eV, and a high electron mobility of 1.7 x 10(-3) cm(2) s(-1). The ternary blend organic solar cells (OSCs) consisting of low-bandgap donor PTB7-Th, ultra-narrow-bandgap nonfullerene acceptor F8IC, and FPIC yield a high power conversion efficiency (PCE) of 13.0%, significantly surpassing the PCE value of the PTB7-Th/F8IC binary blend OSCs (9.55%). The ternary blend exhibits complementary absorption, effective exciton dissociation, balanced charge transport, and reduced charge recombination, leading to the improvement in open-circuit voltage, short-circuit current density, and fill factor relative to those of its PTB7-Th/F8IC counterpart. This work indicates that the mid-bandgap fused-pyrene electron acceptor FPIC is a promising third component for enhancing the photovoltaic performance of low-bandgap donor/acceptor binary blends.
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