Compositional Design for High-Efficiency All-Inorganic Tin Halide Perovskite Solar Cells

Sang Woo Park, Jin Hyuck Heo, Hyong Joon Lee, Hyungjun Kim, Sang Hyuk Im, Ki Ha Hong

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Metal halide perovskite solar cells have advanced rapidly with exceptional power conversion efficiencies (PCEs). However, the toxicity of lead-based perovskites necessitates a transition toward non-toxic alternatives. This study explored the potential of inorganic tin-based halide perovskites, such as CsSnX3, as viable alternatives. Despite their inherent advantages, these perovskites face efficiency challenges, owing to significant open-circuit voltage deficits, stability issues, and oxidation issues. We addressed these challenges through the compositional engineering of CsSn(I1-xBrx)3 perovskites, utilizing ab initio thermodynamic calculations to determine the optimal compositions. Our approach was validated by fabricating CsSn(I1-xBrx)3 perovskite solar cells with varying Br contents, guided by our theoretical framework. Notably, our highest efficiency reached 11.87% with the CsSnI2Br composition, marking the highest PCE for inorganic tin perovskite solar cells to date, which was accomplished without special additives. This study provides a potential pathway for further enhancing the stability and efficiency of tin-based perovskite solar cells.

Original languageEnglish
Pages (from-to)5061-5069
Number of pages9
JournalACS Energy Letters
Volume8
Issue number12
DOIs
Publication statusPublished - 2023 Dec 8

Bibliographical note

Publisher Copyright:
© 2023 American Chemical Society

ASJC Scopus subject areas

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

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