Persistent enhancement of exciton diffusivity in CsPbBr
3
nanocrystal solids
Wenbi Shcherbakov-Wu,
Seryio Saris,
Thomas John Sheehan
et al.
Abstract:In semiconductors, exciton or charge carrier diffusivity is typically described as an inherent material property. Here, we show that the transport of excitons among CsPbBr
3
perovskite nanocrystals (NCs) depends markedly on how recently those NCs were occupied by a previous exciton. Using transient photoluminescence microscopy, we observe a striking dependence of the apparent exciton diffusivity on excitation laser power that does not arise from nonlinear exciton-exciton interactions or… Show more
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