Correlations between Electrochemical Ion Migration and Anomalous Device Behaviors in Perovskite Solar Cells

Jie Liu, Mingyu Hu, Zhenghong Dai, Wenxiu Que, Nitin P. Padture*, Yuanyuan ZHOU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Ion migration is a solid-state electrochemical phenomenon widely observed in the family of halide perovskite materials, which is attributed to their intrinsically soft ionic crystal structures and mixed electronic-ionic conduction properties. Numerous studies in the literature have indicated that ion migration is the major cause of various anomalous device behaviors, including light-soaking effect, photocurrent-voltage hysteresis, and slow open-circuit voltage decay, which are commonly observed in perovskite solar cells. Herein we present a comprehensive review on these studies. We also provide a mechanistic understanding, featuring the built-in electrical field as a key factor for the elucidation of ion migration and associated device behaviors in a consistent manner. Finally, we discuss future research directions toward a better understanding of these phenomena.

Original languageEnglish
Pages (from-to)1003-1014
Number of pages12
JournalACS Energy Letters
Volume6
Issue number3
DOIs
Publication statusPublished - 12 Mar 2021

Scopus Subject Areas

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry

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