Facilely full-end-capping engineering promotes high-performance organic solar cells with simultaneously improved efficiency and stability

Youhui Zhang, Jiawei Deng, Qilong Mao, Sang Young Jeong, Xuexiang Huang, Lifu Zhang, Byongkyu Lee, Bin Huang, Han Young Woo, Changduk Yang, Junying Xu, Feiyan Wu, Qian Yong Cao, Lie Chen

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Main-chain construction and side-chain modification are general strategies to design polymer donors for organic solar cell (OSCs), but they always suffer from deliberate molecular design and tedious synthesis. Here, we employ full-end-capping engineering, a facile and versatile strategy to boost both efficiency and stability for non-fullerene OSCs. A series of full-end-capped polymer donors are obtained by a simple end-capping reaction right after the polymerization in one-pot. It is found that the end-capping groups not only completely remove the unreacted terminal defects in the polymer chains, but also well-manipulate the molecular orientation, film-forming process and resulting morphology, optimize the charge dynamics, and reduce non-radiative energy loss. The device with full-end-capped PM6-T:Y6-based obtains an impressive efficiency of 17.11%, showing all-over improved device parameters and long-term stability than unend-capped PM6:Y6-based device (15.96%). Notably, PM6-T:BTP-eC9-based device reaches a efficacy of 18.45%, among the highest performance of BTP-eC9-based devices.

Original languageEnglish
Article number141343
JournalChemical Engineering Journal
Volume457
DOIs
Publication statusPublished - 2023 Feb 1

Bibliographical note

Publisher Copyright:
© 2023

Keywords

  • Efficiency
  • Full-end-capping engineering
  • Organic solar cells
  • Stability

ASJC Scopus subject areas

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

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