Conjugated polyelectrolyte doped perovskite films with enhanced photovoltaic performance and stability

Helin Wang, Jiatao Wu, Jun Song, Junle Qu, Jiarong Lian, Peng Cheng Qian, Wai Yeung Wong (Corresponding Author)

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

Perovskite solar cells (PSCs) have achieved great success in the past few years because of outstanding photovoltaic performance. However, the existence of electronic trap states in the perovskite film is an obstacle for the fabrication of high-performance and stable PSCs. Herein, a linear conjugated polyelectrolyte was developed and employed as a dopant to improve the performance and stability of the perovskite film. The PPNNA doping can passivate surface defects to reduce the electronic trap states in the perovskite film, while simultaneously enhancing the electron extraction and transport to achieve high-efficiency solar cells. Furthermore, the PPNNA-doped perovskite film shows better stability from efficient surface passivation. The optimal 0.4% PPNNA-doped device exhibits better photovoltaic efficiency (20.38%) with enhanced device stability as compared to the control device (18.51%). This novel method by doping with the conjugated polyelectrolyte provides a pathway to fabricate high-efficiency and stable inverted PSCs.

Original languageEnglish
Article number128068
JournalChemical Engineering Journal
Volume417
DOIs
Publication statusPublished - 1 Aug 2021

Keywords

  • Conjugated polyelectrolyte
  • Dopant
  • Electron transport
  • Perovskite solar cell
  • Surface passivation

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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