期刊
INORGANIC CHEMISTRY
卷 61, 期 13, 页码 5184-5189出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.1c04032
关键词
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资金
- National Natural Science Foundation of China (NSFC) [12174146]
- China Postdoctoral Science Foundation [2021M691221]
- fundamental research funds for the Central Universities
By applying controllable pressure, researchers have found that zero-dimensional lead-free perovskite materials exhibit a blue shift in their emission spectra and a color transformation from yellow to green under pressure. Furthermore, the band gap of the material is reduced. This study provides a fundamental basis for modulating the optical properties of low-dimensional metal halide perovskites.
All lead-free inorganic halide perovskites, as efficient solid-state light emission materials, have become ideal green optoelectronic materials to replace lead halide perovskites for diversified lighting and display applications with their excellentstability. Here, we investigated the pressure-derived optical and structural response of a zero-dimensional lead-free perovskiteRb7Sb3Cl16through applying controllable pressure. A pressure-induced blue shift of the broadband emission was achieved, and it was followed by the emission color transformation from yellow to green, which was ascribed to the electron-phonon coupling weakening and the suppression of structural deformation upon lattice contraction. In parallel, the band gap was narrowed by about0.5 eV as a result of enhanced metal halide orbital overlap under high pressure. This work provides a fundamental understanding for modulating the optical properties of the low-dimensional metal halide perovskites
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