Distannylated Bithiophene Imide: Enabling High-Performance n-Type Polymer Semiconductors with an Acceptor–Acceptor Backbone

Yongqiang Shi, Han Guo, Jiachen Huang, Xianhe Zhang, Ziang Wu, Kun Yang, Yujie Zhang, Kui Feng, Han Young Woo, Rocio Ponce Ortiz, Ming Zhou, Xugang Guo

Research output: Contribution to journalArticle

Abstract

A distannylated electron-deficient bithiophene imide (BTI-Tin) monomer was synthesized and polymerized with imide-functionalized co-units to afford homopolymer PBTI and copolymer P(BTI-BTI2), both featuring an acceptor–acceptor backbone with high molecular weight. Both polymers exhibited excellent unipolar n-type character in transistors with electron mobility up to 2.60 cm2 V−1 s−1. When applied as acceptor materials in all-polymer solar cells, PBTI and P(BTI-BTI2) achieved high power-conversion efficiency (PCE) of 6.67 % and 8.61 %, respectively. The PCE (6.67 %) of polymer PBTI, synthesized from the distannylated monomer, is much higher than that (0.14 %) of the same polymer PBTI*, synthesized from typical dibrominated monomer. The 8.61 % PCE of copolymer P(BTI-BTI2) is also higher than those (<1 %) of homopolymers synthesized from dibrominated monomers. The results demonstrate the success of BTI-Tin for accessing n-type polymers with greatly improved device performance.

Original languageEnglish
Pages (from-to)14557-14565
Number of pages9
JournalAngewandte Chemie
Volume132
Issue number34
DOIs
Publication statusPublished - 2020 Aug 17

Keywords

  • all-polymer solar cells
  • n-type acceptor–acceptor polymers
  • organic thin-film transistors
  • polymer molecular weight
  • stannylated bithiophene imide

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint Dive into the research topics of 'Distannylated Bithiophene Imide: Enabling High-Performance n-Type Polymer Semiconductors with an Acceptor–Acceptor Backbone'. Together they form a unique fingerprint.

  • Cite this

    Shi, Y., Guo, H., Huang, J., Zhang, X., Wu, Z., Yang, K., Zhang, Y., Feng, K., Woo, H. Y., Ortiz, R. P., Zhou, M., & Guo, X. (2020). Distannylated Bithiophene Imide: Enabling High-Performance n-Type Polymer Semiconductors with an Acceptor–Acceptor Backbone. Angewandte Chemie, 132(34), 14557-14565. https://doi.org/10.1002/ange.202002292