High-Performance Eight-Membered Indacenodithiophene-Based Asymmetric A-D-A Type Non-Fullerene Acceptors

Chao Li, Jiali Song, Linglong Ye, Changwoo Koh, Kangkang Weng, Huiting Fu, Yunhao Cai, Yuanpeng Xie, Donghui Wei, Han Young Woo, Yanming Sun

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Indacenodithiophene (IDT) has been widely used as the central core to design high-performance acceptor-donor-acceptor (A-D-A)-type non-fullerene acceptors (NFAs). NFAs based on five-, six-, seven-, and nine-membered IDT have been successfully prepared. However, less research attention has been paid to the eight-membered IDT derivative. In this study, a novel asymmetric TTPTTT building block as an eight-membered IDT unit are designed and synthesized. The effect of nonfluorinated, monofluorinated, and difluorinated end-capping groups on the photovoltaic performance of TTPTTT-based NFAs are specifically investigated. By blending with the polymer donor PBT1-C, organic solar cells (OSCs) based on TTPTTT-IC, TTPTTT-2F, and TTPTTT-4F exhibited power conversion efficiencies (PCEs) of 7.91, 11.52, and 12.05%, respectively. Our results indicate that the asymmetric TTPTTT building block as an eight-membered IDT derivative is a promising central core unit for designing high-performance A-D-A type NFAs.

Original languageEnglish
Article number1800246
JournalSolar RRL
Volume3
Issue number1
DOIs
Publication statusPublished - 2019 Jan 1

Keywords

  • asymmetric non-fullerene acceptor
  • indacenodithiophene derivative
  • organic solar cells
  • power conversion efficiency

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Energy Engineering and Power Technology
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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    Li, C., Song, J., Ye, L., Koh, C., Weng, K., Fu, H., Cai, Y., Xie, Y., Wei, D., Woo, H. Y., & Sun, Y. (2019). High-Performance Eight-Membered Indacenodithiophene-Based Asymmetric A-D-A Type Non-Fullerene Acceptors. Solar RRL, 3(1), [1800246]. https://doi.org/10.1002/solr.201800246