Low-bandgap nonfullerene acceptor based on thieno[3,2-b]indole core for highly efficient binary and ternary organic solar cells
Journal article, 2022
A low-bandgap nonfullerene acceptor (NFA) TIT-2FIC based on thieno[3,2-b]indole-thiophenes core has been developed. Compared with the analogue NFAs DTC(4Ph)-4FIC and IT-4F, TIT-2FIC exhibited remarkably red-shifted absorption, and up-shifted HOMO energy level. In addition, TIT-2FIC showed interesting universal miscibility with the donors nonfluorinated PBDB-T and fluorinated PM6, therefore the corresponding organic solar cells achieved promising power conversion efficiencies (PCEs) of 11.80% and 13.00%, respectively, which are higher compared to the counterpart IT-4F based cells. Furthermore, the ternary PM6:TIT-2FIC:Y6 cell pronounced a high PCE of 17.22%, being significantly improved from that of 16.04% for the binary PM6:Y6 cell. Similar improvement in PCEs from 13.41% to 14.46% was also observed in the ternary PM6:TIT-2FIC:IT-4F cell with TIT-2FIC as the third component. These results indicated that TIT-2FIC is universally applicable as an acceptor with nonfluorinated or fluorinated polymer donor materials in both binary and ternary cells.
Nonfullerene acceptors
Frontier energy levels
Organic solar cells
Thieno[3,2-b]indole
Power conversion efficiency
Author
Liang Xie
Hunan University of Science and Technology
Yang Zhang
Guilin University of Electronic Technology
Wenliu Zhuang
Polymer Technology
Guangdong Industry Polytechnic
Sang Young Jeong
Korea University
Qingzhen Bian
Linköping University
Huangfen Li
Hunan University of Science and Technology
Jiamin Cao
Hunan University of Science and Technology
Wanqing Liu
Hunan University of Science and Technology
Hua Tan
Changzhou University
Han Young Woo
Korea University
Jian Zhang
Guilin University of Electronic Technology
Ergang Wang
Zhengzhou University
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Chemical Engineering Journal
1385-8947 (ISSN)
Vol. 427 131674Subject Categories
Materials Chemistry
Other Chemistry Topics
DOI
10.1016/j.cej.2021.131674