Non-fullerene organic solar cells based on a BODIPY-polymer as electron donor with high photocurrent†
Zaifei Ma,Yunhua Xu,Yiting Guo,Fan Yang,Dongdong Xia,Cheng Li,Zheng Tang
Journal of Materials Chemistry C Pub Date : 01/18/2020 00:00:00 , DOI:10.1039/C9TC05480D
Abstract

Boron dipyrromethene (BODIPY)-based conjugated materials can show absorption spectra in the near-infrared (NIR) region, but organic solar cells (OSCs) based on these materials as donors provide an unsatisfactory photo-response, low photocurrent and hence low performance. Herein, a small band gap BODIPY-polymer as a donor combined with a fused ring electron acceptor was applied into non-fullerene OSCs, producing a broad photo-response from 300 nm to 1000 nm and hence a high short-circuit current density of over 21 mA cm−2. As a consequence, a record efficiency of 9.86% was obtained for the BODIPY-polymer, indicating its potential applications in semitransparent devices.

Graphical abstract: Non-fullerene organic solar cells based on a BODIPY-polymer as electron donor with high photocurrent