phase-stable CsPbI3 perovskite quantum dots.21 Therefore, nanostructured CsPbX3 has been considered a promising light-emitting material. Despite these ...
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Cite this: Nanoscale, 2018, 10, 9949
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Luminescence and thermal behaviors of free and trapped excitons in cesium lead halide perovskite nanosheets†Xiangzhou Lao,a Zhi Yang,b Zhicheng Su,a Zilan Wang, Minqiang Wang,b Xi Yaob and Shijie Xu *a
c
Honggang Ye,
a,d
Very recently, all-inorganic perovskite CsPbX3 (X = Cl, Br, I) nanostructures such as nanoparticles, nanoplates, and nanorods have been extensively explored. These CsPbX3 nanostructures exhibit excellent optical properties; however, the photophysics involved is not yet clear. Herein, the emission properties and luminescence mechanism of CsPbBr3 nanosheets (NSs) were investigated using steady-state and time-resolved photoluminescence (PL) spectroscopic techniques. Moreover, two kinds of excitonic emissions (Peak 1 and Peak 2) are observed at low temperatures (
