Citation: Jia-min Cao, Liu Qian, Dan He, Zuo Xiao, Li-ming Ding. D-A Copolymers Based on a Pentacyclic Acceptor Unit and a 3, 3'-Difluoro-2, 2'-bithiophene for Solar Cells[J]. Chinese Journal of Polymer Science, ;2017, 35(12): 1457-1462. doi: 10.1007/s10118-017-1996-4 shu

D-A Copolymers Based on a Pentacyclic Acceptor Unit and a 3, 3'-Difluoro-2, 2'-bithiophene for Solar Cells

Center for Excellence in Nanoscience(Chinese Academy of Sciences), Key Laboratory of Nanosystem and Hierarchical Fabrication(Chinese Academy of Sciences), National Center for Nanoscience and Technology, Beijing 100190, China

Corresponding author: Li-ming Ding, ding@nanoctr.cn

^†

Received Date: 3 May 2017
Revised Date: 12 June 2017
Accepted Date: 16 June 2017

Fund Project: the National Natural Science Foundation of China 21572041the National Natural Science Foundation of China 21372053the National Natural Science Foundation of China 21374025State Key Laboratory of Luminescent Materials and Devices 2016-skllmd-05the National Natural Science Foundation of China 51503050the National Natural Science Foundation of China U1401244

A D-A copolymer, P2FBTTPTI, was developed by copolymerizing a pentacyclic acceptor unit, thieno[2', 3':5, 6]pyrido[3, 4-g]thieno[3, 2-c]isoquinoline-5, 11(4H, 10H)-dione (TPTI), with 3, 3'-difluoro-2, 2'-bithiophene (2FBT). P2FBTTPTI possessed a low highest occupied molecular orbital (HOMO) energy level (-5.50 eV) and a good hole mobility (4.14×10^-4 cm²·V^-1·s^-1). P2FBTTPTI:PC₇₁BM solar cells gave a decent power conversion efficiency (PCE) of 7.64% and a high open-circuit voltage (V_oc) of 0.95 V.
- D-A copolymers,
- Fluorination,
- Open-circuit voltage,
- Polymer solar cells
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