Interdiffusion Stomatal Movement in Efficient Multiple-Cation-Based Perovskite Solar Cells

Cong Li, Zhinan Zhu, Bingqiang Niu, Fu Yang, Xinpeng Chen, Yingke Ren, Peng Zhong, Shuzi Hayase, Tianhong Cui, Rusen Yang

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The composition and crystallization process are essential for high-quality perovskite films. Cesium (Cs) and methylammonium chlorine (MACl) were found to affect the crystallization kinetics of perovskite, and the performance and stability of corresponding devices were greatly improved. We adopted an ion exchange method to remove MACl vapor and add Cs to form a multiple-cation-based perovskite film. With the increase of annealing time, Cl- from cesium chloride (CsCl) and MA from methylammonium bromide (MABr) formed gradually MACl vapor, and the porosity of surface morphology improved accordingly. The highly crystallized and compact CsyMAx - yFA1 - xPbI3 - xBrx perovskite film with different compositions was eventually obtained. The effects of the amount of MABr on the property of perovskite films and on the performance of the corresponding perovskite solar cells (PerSCs) were systematically studied. The PerSCs derived from 12 mg of MABr exhibit the best photovoltaic performance with a power conversion efficiency of 21.57% under 1 sun illumination.

Original languageEnglish (US)
Pages (from-to)35105-35112
Number of pages8
JournalACS Applied Materials and Interfaces
Volume12
Issue number31
DOIs
StatePublished - Aug 5 2020
Externally publishedYes

Bibliographical note

Publisher Copyright:
Copyright © 2020 American Chemical Society.

Keywords

  • crystallinity
  • multiple-cation
  • perovskite solar cells
  • planar structure
  • stomatal movement

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