@article{d867db5976ec4fa88bd1511195f8a13a,
title = "On-Chip Light-Incorporated In Situ Transmission Electron Microscopy of Metal Halide Perovskite Materials",
abstract = "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.",
author = "Tianwei Duan and Weizhen Wang and Songhua Cai and Yuanyuan Zhou",
note = "Funding Information: Y.Z. acknowledges the Early Career Scheme (No. 22300221), the General Research Fund (No. 12302822) from the Hong Kong Research Grant Council (RGC), and the Excellent Young Scientists Fund (No. 52222318) from the National Natural Science Foundation of China (NSFC). Y.Z. also acknowledges start-up grants, the Initiation Grant - Faculty Niche Research Areas (IG-FNRA) 2020/21 and the Interdisciplinary Research Matching Scheme (IRMS) 2020/21 from Hong Kong Baptist Univeristy. S.C. acknowledges support from start-up grants from the Department of Applied Physics, the Hong Kong Polytechnic University (1-BD96, 1-BDCM), the Hong Kong RGC General Research Fund (Nos. 15306021 and 15306122), the NSFC Young Scientists Fund (No. 12104381), and the open-topic program of State Key Laboratory of Solid State Microstructures at Nanjing University (No. M34001). T.D. acknowledges the support from the Hong Kong RGC Postdoc Fellowship Scheme. Part of this work was performed on the Hong Kong RGC-supported STEM facilities (No. C5029-18E). Publisher Copyright: {\textcopyright} 2023 The Authors. Published by American Chemical Society.",
year = "2023",
month = jul,
day = "14",
doi = "10.1021/acsenergylett.3c00750",
language = "English",
volume = "8",
pages = "3048--3053",
journal = "ACS Energy Letters",
issn = "2380-8195",
publisher = "American Chemical Society",
number = "7",
}