High-Performance Nonfullerene Polymer Solar Cells Based on a Wide-Bandgap Polymer without Extra Treatment

Guangda Li, Qingqing Xu, Chunmei Chang, Qunping Fan, Xiaoqian Zhu, Wanbin Li, Xia Guo, Maojie Zhang, Wai Yeung Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)

Abstract

Nonfullerene polymer solar cells (PSCs) are developed based on a fluorinated thienyl-based wide-bandgap (WBG) polymer PBBF as the electron donor and nonfullerene small molecule IDIC as the electron acceptor. PBBF exhibits a strong absorption in the range of 300–605 nm with a wide optical bandgap of 2.05 eV, which is complementary with that of IDIC. Meanwhile, it possesses a deeper highest occupied molecular orbital energy level of −5.52 eV and a higher hole mobility of 7.3 × 10 −4  cm 2 V −1  s −1 compared to the nonfluorinated polymer PBDTT. The PSCs based on PBBF:IDIC without extra treatment show a power conversion efficiency (PCE) of 8.5% with a V oc of 0.95 V, a J sc of 15.3 mA cm −2 , and an FF of 58.8%, which is much higher than that of the devices based on PBDTT:IDIC (a PCE of 5.3% with a V oc of 0.88 V, a J sc of 13.7 mA cm −2 , and an FF of 43.9%). These results indicate that PBBF is a promising WBG polymer donor material for the photovoltaic applications in nonfullerene PSCs.

Original languageEnglish
Article number1800660
JournalMacromolecular Rapid Communications
Volume40
Issue number1
DOIs
Publication statusPublished - 1 Jan 2019

Keywords

  • fluorination
  • nonfullerene
  • polymer solar cells
  • wide-bandgap polymers

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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