Biselenophene Imide: Enabling Polymer Acceptor with High Electron Mobility for High-Performance All-Polymer Solar Cells

Suxiang Ma, Bangbang Li, Shaokuan Gong, Junwei Wang, Bin Liu, Sang Young Jeong, Xihan Chen, Han Young Woo, Kui Feng, Xugang Guo

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The shortage of narrow band gap polymer acceptors with high electron mobility is the major bottleneck for developing efficient all-polymer solar cells (all-PSCs). Herein, we synthesize a distannylated electron-deficient biselenophene imide monomer (BSeI-Tin) with high purity/reactivity, affording an excellent chance to access acceptor–acceptor (A–A) type polymer acceptors. Copolymerizing BSeI-Tin with dibrominated monomer Y5-Br, the resulting A–A polymer PY5-BSeI shows a higher molecular weight, narrower band gap, deeper-lying frontier molecular orbital levels and larger electron mobility than the donor–acceptor type counterpart PY5-BSe. Consequently, the PY5-BSeI-based all-PSCs deliver a remarkable efficiency of 17.77 % with a high short-circuit current of 24.93 mA cm−2 and fill factor of 75.83 %. This efficiency is much higher than that (10.70 %) of the PY5-BSe-based devices. Our study demonstrates that BSeI is a promising building block for constructing high-performance polymer acceptors and stannylation of electron-deficient building blocks offers an excellent approach to developing A–A type polymers for all-PSCs and even beyond.

Original languageEnglish
Article numbere202308306
JournalAngewandte Chemie - International Edition
Volume62
Issue number39
DOIs
Publication statusPublished - 2023 Sept 25

Bibliographical note

Funding Information:
X.G. is thankful for the financial support from the Songshan Lake Materials Laboratory (2021SLABFK03) and the Shenzhen Science and Technology Innovation Commission (JCYJ20220818100617037 and KCXST20221021111413031). K.F. acknowledges the financial support by the National Natural Science Foundation of China (22275078 and 22005135). H.Y.W. acknowledges the financial support from the National Research Foundation of Korea (2019R1A6A1A11044070 and 2020M3H4A3081814). This work was also supported by Center for Computational Science and Engineering at Southern University of Science and Technology. The authors acknowledge the assistance of SUSTech Core Research Facilities.

Funding Information:
X.G. is thankful for the financial support from the Songshan Lake Materials Laboratory (2021SLABFK03) and the Shenzhen Science and Technology Innovation Commission (JCYJ20220818100617037 and KCXST20221021111413031). K.F. acknowledges the financial support by the National Natural Science Foundation of China (22275078 and 22005135). H.Y.W. acknowledges the financial support from the National Research Foundation of Korea (2019R1A6A1A11044070 and 2020M3H4A3081814). This work was also supported by Center for Computational Science and Engineering at Southern University of Science and Technology. The authors acknowledge the assistance of SUSTech Core Research Facilities.

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

Keywords

  • Acceptor
  • Acceptor-Acceptor Backbone
  • Narrow Bandgap
  • Polymer
  • Solar Cells

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry

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