On-Chip Light-Incorporated In Situ Transmission Electron Microscopy of Metal Halide Perovskite Materials

Tianwei Duan, Weizhen Wang, Songhua Cai*, Yuanyuan Zhou*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

5 Citations (Scopus)


We report an on-chip light-incorporated in situ transmission electron microscopy (LI2ST) approach for probing metal halide perovskites (MHPs) at the nanoscale, realizing the real-time, site-specific tracking of the light-triggered structure transformation. This in situ platform is based on a specifically designed microelectromechanical systems (MEMS) chip that offers the capability of light illumination with adjustable intensity and tailorable multiwavelength. The excellent operational reliability of the platform allows for the continuous observation of nanoscale regions of interest, recording the morphological and structural evolutions of perovskite grains and grain boundaries. A proof-of-concept demonstration shows a polycrystalline MHP film undergoing decomposition upon continuous light illumination. Counterintuitively, the decomposition starts and expands within the intragrain regions rather than at the grain boundaries. This work demonstrates an unprecedented ability to reveal light-triggered structural-phase variation for illuminating the dynamic behaviors of MHPs with implications for various energy applications.
Original languageEnglish
Pages (from-to)3048–3053
Number of pages6
JournalACS Energy Letters
Issue number7
Early online date20 Jun 2023
Publication statusPublished - 14 Jul 2023

Scopus Subject Areas

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


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