Simultaneous improvement to performance and stability of perovskite solar cells through incorporation of imidazolium-based ionic liquid

M. Thambidurai, Herlina Arianita Dewi, Anil Kanwat, Srilakshmi Subramanian Periyal, Nur Fadilah Jamaludin, Annalisa Bruno, Nripan Mathews, Cuong Dang*, Hung D. Nguyen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Despite the meteoric rise of perovskite solar cell (PSC) efficiency in recent years, commercialization of this technology is still limited by issues pertaining to perovskite instability. Herein, a novel ionic liquid (IL) – 1-ethyl-3-methylimidazolium chloride (EMIC) additive is shown to be beneficial in enhancing perovskite's ambient and operational stability. Not only does it improve crystallinity and smoothen surface topography, but the simultaneous increase in carrier lifetimes, reduction in defect density as well as improvement to interfacial band energy alignment have contributed extensively towards promoting higher power conversion efficiency (PCE) and moisture/thermal stability of the EMIC-based PCSs. The champion, unencapsulated EMIC-based PSC yields a PCE of 20.15% and retains 89% of its initial PCE after 1440 h of storage under ambient conditions (30% Relative humidity (RH), 25 °C) and retains 65% of its initial PCE after 600 h of thermal aging (85 °C, 10% RH).

Original languageEnglish
Article number232874
JournalJournal of Power Sources
Volume564
DOIs
Publication statusPublished - Apr 30 2023
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2023 Elsevier B.V.

ASJC Scopus Subject Areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Keywords

  • 1-Ethyl-3-methylimidazolium chloride (EMIC) ionic liquid
  • Additive engineering
  • Defect passivation
  • Moisture/thermal stability
  • Perovskite solar cells

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