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Emerging Hydrochromic Metal Halide Perovskites

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Abstract

Hydrochromic metal halide perovskites have emerged as a novel class of smart materials that exhibit remarkable changes in optical emission upon water/moisture exposure. Their exceptional characteristics, including excellent responsiveness, superior reversibility, and programmable chromatic transitions, have positioned them as promising candidates for next-generation applications encompassing environmental monitoring, information encryption, and intelligent sensing. This review focuses on the recent advancements in hydrochromic halide perovskite materials, including emerging material systems and their transformative applications in humidity/water detection and information protection. Through mechanistic elucidation of structure-property correlations, fundamental insights are provided into the hydrochromic phenomena observed in various perovskite systems, thus offering general principles for the rational design of advanced hydrochromic perovskites. An attempt is also made to point out the main challenges and possible solutions for the future development of hydrochromic halide perovskite materials. © 2025 The Author(s). Advanced Optical Materials published by Wiley-VCH GmbH.
Original languageEnglish
Article numbere01080
JournalAdvanced Optical Materials
Volume13
Issue number27
Online published22 Jul 2025
DOIs
Publication statusPublished - 23 Sept 2025

Funding

S.L. and J.C. contributed equally to this work. The work described in this paper was substantially supported by a fellowship award from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. CityU RFS2021-1S03).

Research Keywords

  • hydrochromic
  • optical
  • perovskite
  • stimulus-responsive

Publisher's Copyright Statement

  • This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

RGC Funding Information

  • RGC-funded

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