A Non-Conjugated Polymer Acceptor for Efficient and Thermally Stable All-Polymer Solar Cells
Journal article, 2020
A non-conjugated polymer acceptor PF1-TS4 was firstly synthesized by embedding a thioalkyl segment in the mainchain, which shows excellent photophysical properties on par with a fully conjugated polymer, with a low optical band gap of 1.58 eV and a high absorption coefficient >105 cm−1, a high LUMO level of −3.89 eV, and suitable crystallinity. Matched with the polymer donor PM6, the PF1-TS4-based all-PSC achieved a power conversion efficiency (PCE) of 8.63 %, which is ≈45 % higher than that of a device based on the small molecule acceptor counterpart IDIC16. Moreover, the PF1-TS4-based all-PSC has good thermal stability with ≈70 % of its initial PCE retained after being stored at 85 °C for 180 h, while the IDIC16-based device only retained ≈50 % of its initial PCE when stored at 85 °C for only 18 h. Our work provides a new strategy to develop efficient polymer acceptor materials by linkage of conjugated units with non-conjugated thioalkyl segments.
thermal stability
non-conjugated polymer acceptors
thioalkyl chain linkages
all-polymer solar cells
power conversion efficiency
Author
Qunping Fan
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Wenyan Su
Jinan University
Soochow University
Shanshan Chen
Ulsan National Institute of Science and Technology (UNIST)
Chongqing University
Tao Liu
Hong Kong University of Science and Technology
Wenliu Zhuang
Guangdong Industry Polytechnic
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Ruijie Ma
Hong Kong University of Science and Technology
Xin Wen
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Zhihong Yin
Soochow University
Zhenghui Luo
Hong Kong University of Science and Technology
Xia Guo
Soochow University
Lintao Hou
Jinan University
Kasper Moth-Poulsen
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Yu Li
Guangdong Industry Polytechnic
Zhiguo Zhang
Beijing University of Chemical Technology
Changduk Yang
Ulsan National Institute of Science and Technology (UNIST)
Donghong Yu
Sino-Danish Center for Education and Research Denmark
Aalborg University
He Yan
Hong Kong University of Science and Technology
Maojie Zhang
Soochow University
Ergang Wang
Zhengzhou University
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Angewandte Chemie - International Edition
1433-7851 (ISSN) 1521-3773 (eISSN)
Vol. 59 45 19835-19840Subject Categories
Polymer Chemistry
Textile, Rubber and Polymeric Materials
Other Physics Topics
DOI
10.1002/anie.202005662