1.State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
2.University of Chinese Academy of Sciences, Beijing, China
3.State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
Xin Guo (guoxin@dicp.ac.cn)
Can Li (canli@dicp.ac.cn)
收稿:2025-03-31,
修回:2025-08-26,
录用:2025-09-01,
网络出版:2025-11-06,
纸质出版:2025-12-31
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Hao Tian, Fengke Sun, Jun Chen, 等. Triboluminescence of metal halide perovskite films[J]. Light: Science & Applications, 2025,14(12):4068-4075.
Tian, H. et al. Triboluminescence of metal halide perovskite films. Light: Science & Applications, 14, 4068-4075 (2025).
Hao Tian, Fengke Sun, Jun Chen, 等. Triboluminescence of metal halide perovskite films[J]. Light: Science & Applications, 2025,14(12):4068-4075. DOI: 10.1038/s41377-025-02032-4.
Tian, H. et al. Triboluminescence of metal halide perovskite films. Light: Science & Applications, 14, 4068-4075 (2025). DOI: 10.1038/s41377-025-02032-4.
Metal halide perovskites (MHPs) have shown fantastic properties such as photoelectric conversion
electroluminescence
light amplification
ferroelectricity
and flexoelectricity
becoming versatile materials in diverse fields. Herein
we report a previously undiscovered nature of the MHP film
i.e. triboluminescence (TL)
and elucidate its underlying mechanism. The TL response is triggered when an MHP film is scraped by specific materials (like Cu
Au
Pt) with a lower Fermi level than that of the MHP. The friction induces electron transfer from MHP to scraper
generating a positive electrostatic field on the surface of the MHP film
which leads to stretched MHP lattices owing to electrostatic repulsion
consequently enhancing fluorescence and charge carrier lifetime. If the friction material (like Al) has a higher Fermi level
electron transfer process
electrostatic field direction
and lattice structure change are just the opposite
resulting in reduced fluorescence. This work unveils the TL phenomenon of the MHP film and the unique mechanism
opening up new avenues for explorations on the appealing MHPs.
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