Accurately Quantifying Stress during Metal Halide Perovskite Thin Film Formation

Laura Mundt, Laura Schelhas, Kevin Stone

Research output: Contribution to journalArticlepeer-review

3 Scopus Citations

Abstract

The role of strain in metal halide perovskite (MHP) solar cells is still under investigation, showing both beneficial and detrimental effects on the device performance and stability. One crucial component to elucidating the impact of strain in the MHP absorber is a robust method of quantifying the amount of strain in the material. Here, we present a parametric refinement approach based on grazing incidence wide-angle X-ray scattering and demonstrate its use on quantifying strain during thermal annealing and subsequent cooling as a function of substrate and processing route. We use the analysis to reveal the impact of the cubic-to-tetragonal phase transition during cooling on the material's strain and discuss texture formation as a potential strain-relief mechanism. Thereby we present both a robust approach to quantify strain in MHPs and potential mechanisms to control strain in the film, opening the path for further investigations of strain in MHPs.

Original languageAmerican English
Pages (from-to)27791-27798
Number of pages8
JournalACS Applied Materials and Interfaces
Volume14
Issue number24
DOIs
StatePublished - 2022

Bibliographical note

Publisher Copyright:
© 2022 The Authors. Published by American Chemical Society.

NREL Publication Number

  • NREL/JA-5900-83091

Keywords

  • metal halide perovskites
  • phase transition
  • preferred orientation
  • strain
  • substrate

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