Unraveling the Impact of Bromine Incorporation on the Hybrid Perovskite Film Phase Evolution Mechanism by In Situ Characterization

Aoxi He, Yunfan Wang, Peng Tang*, Zhuoqiong Zhang, Zixin Zeng, Yuxuan Zhang, Xia Hao, Lili Wu, Shu Kong So, Sai Wing Tsang, Jingquan Zhang*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

1 Citation (Scopus)

Abstract

Hybrid organic-inorganic perovskite materials have substantially boosted solar cell efficiency, but such multiple components complicate the crystallization kinetics and phase evolution process. In particular, the mechanisms underlying the film formation where small halide Br is involved in, from precursor to solid-state thin films as well as the process-structure relationship, still need to be determined. In this study, the role of Br ion in altering the crystallization kinetics and phase-transition mechanism, is recognized using in situ characterization and density functional analysis method based on first principles. High-quality perovskite film can be fabricated based on these results through precise compositional engineering. These results provide basic insight into the crystallization of hybrid perovskite materials with direct implications for fabricating high-quality perovskite film and high-performance perovskite solar cells.

Original languageEnglish
Article number2300957
JournalAdvanced Energy Materials
Volume13
Issue number39
Early online date8 Sept 2023
DOIs
Publication statusPublished - 20 Oct 2023

Scopus Subject Areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

User-Defined Keywords

  • bromine incorporation
  • crystallization process
  • film quality
  • in situ characterization techniques
  • perovskite solar cells

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