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Highly Efficient Organic Solar Cells Based on S,N-Heteroacene Non-Fullerene Acceptors

  • Chuyi Huang
  • , Xunfan Liao
  • , Ke Gao
  • , Lijian Zuo
  • , Francis Lin
  • , Xueliang Shi
  • , Chang Zhi Li
  • , Hongbin Liu
  • , Xiaosong Li
  • , Feng Liu*
  • , Yiwang Chen
  • , Hongzheng Chen
  • , Alex K.Y. Jen
  • *Corresponding author for this work
  • University of Washington
  • Zhejiang University
  • Nanchang University
  • Shanghai Jiao Tong University
  • City University of Hong Kong

Research output: Contribution to journalArticlepeer-review

Abstract

Two novel non-fullerene acceptors, SN6IC and SN6IC-4F, based on an S,N-heteroacene backbone were designed and synthesized. The cyclopentadiene fragments of commonly used acceptors were replaced with pyrrole rings to improve the electron-donating ability to increase the energy levels of the molecules. Both acceptors match well with the absorption and energy levels of the polymer donor PBDB-T, and PBDB-T:SN6IC-4F-based solar cells showed an excellent power conversion efficiency of 13.2%, with a relatively small VOC loss of 0.54 eV. This study proves that the introduction of a nitrogen atom to replace the sp3-hybridized carbon in the fused ring is very effective for making highly efficient NFAs to further improve the performance of organic solar cells.

Original languageEnglish
Pages (from-to)5429-5434
Number of pages6
JournalChemistry of Materials
Volume30
Issue number15
DOIs
StatePublished - 14 Aug 2018
Externally publishedYes

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