Low-bandgap nonfullerene acceptor based on thieno[3,2-b]indole core for highly efficient binary and ternary organic solar cells

Liang Xie, Yang Zhang, Wenliu Zhuang, Sang Young Jeong, Qingzhen Bian, Huangfen Li, Jiamin Cao, Wanqing Liu, Hua Tan, Han Young Woo, Jian Zhang, Ergang Wang

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number131674
JournalChemical Engineering Journal
Volume427
DOIs
Publication statusPublished - 2022 Jan 1

Keywords

  • Frontier energy levels
  • Nonfullerene acceptors
  • Organic solar cells
  • Power conversion efficiency
  • Thieno[3,2-b]indole

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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