Fused octacyclic electron acceptor isomers for organic solar cells

Guilong Cai, Jingshuai Zhu, Yiqun Xiao, Mengyang Li, Kuan Liu, Jiayu Wang, Wei Wang, Xinhui Lu, Zheng Tang, Jiarong Lian, Pengju Zeng, Yiping Wang, Xiaowei Zhan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

24 Citations (Scopus)

Abstract

We extend thieno[3,2-b]thiophene and naphthalene cores in our previously reported fused-ring electron acceptors (FREAs) F6IC and IHIC2 to benzo[b]benzo[4,5]thieno[2,3-d]thiophene and naphtho[1,2-b:5,6-b′]dithiophene, respectively, and synthesize two new isomeric FREAs BTIC and NTIC. Both BTIC and NTIC exhibit strong absorption from 500 to 800 nm with high extinction coefficients (2.4-2.6 × 105 M-1 cm-1) and electron mobilities of 1.8-3.4 × 10-4 cm2 V-1 s-1. Paired with the polymer donor PM6, the BTIC and NTIC-based organic solar cells (OSCs) show power conversion efficiencies (PCEs) of 11.5-12.2%, much higher than those of the control devices based on IHIC2 and F6IC (7.21-7.31%). The PM6/NTIC-based OSCs afford a higher PCE of 12.2% than PM6/BTIC-based OSCs (11.5%), due to the red-shifted absorption and up-shifted HOMO of NTIC.

Original languageEnglish
Pages (from-to)21432-21437
Number of pages6
JournalJournal of Materials Chemistry A
Volume7
Issue number37
DOIs
Publication statusPublished - 2019

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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