Ionic Liquid Engineering in Perovskite Photovoltaics

Fei Wang, Dawei Duan, Mriganka Singh, Carolin M. Sutter-Fella, Haoran Lin, Liang Li, Panče Naumov, Hanlin Hu

Research output: Contribution to journalReview articlepeer-review


Over the past decade, perovskite photovoltaics have approached other currently available technologies and proven to be the most prospective type of solar cells. Although the many-sided research in this very active field has generated consistent results with regard to their undisputed consistently increasing power conversion efficiency, it also produced several rather contradictory opinions. Among other important details, debate surrounding their proneness to surface degradation and poor mechanical robustness, as well as the environmental footprint of this materials class, remains a moot point. The application of ionic liquids appears as one of the potential remedies to some of these challenges due to their high conductivity, the opportunities for chemical “tuning” of the structure, and relatively lower environmental footprint. This article provides an overview, classification, and applications of ionic liquids in perovskite solar cells. We summarize the use and role of ionic liquids as versatile additives, solvents, and modifiers in perovskite precursor solution, in charge transport layer, and in interfacial and stability engineering. Finally, challenges and the future prospects for the design and/or selection of ionic liquids with a specific profile that meets the requirements for next-generation highly efficient and stable perovskite solar cells are proposed.

Original languageEnglish (US)
Article numbere12435
JournalEnergy and Environmental Materials
Issue number5
StatePublished - Sep 2023


  • devices
  • ionic liquids
  • perovskites
  • photovoltaics

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • General Materials Science
  • Water Science and Technology
  • Environmental Science (miscellaneous)
  • Waste Management and Disposal
  • Energy (miscellaneous)


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