Origin of the Size-Dependent Stokes Shift in CsPbBr3 Perovskite Nanocrystals
MC Brennan, JE Herr, TS Nguyen-Beck… - Journal of the …, 2017 - ACS Publications
The origin of the size-dependent Stokes shift in CsPbBr3 nanocrystals (NCs) is explained for
the first time. Stokes shifts range from 82 to 20 meV for NCs with effective edge lengths
varying from∼ 4 to 13 nm. We show that the Stokes shift is intrinsic to the NC electronic
structure and does not arise from extrinsic effects such as residual ensemble size
distributions, impurities, or solvent-related effects. The origin of the Stokes shift is elucidated
via first-principles calculations. Corresponding theoretical modeling of the CsPbBr3 NC …
the first time. Stokes shifts range from 82 to 20 meV for NCs with effective edge lengths
varying from∼ 4 to 13 nm. We show that the Stokes shift is intrinsic to the NC electronic
structure and does not arise from extrinsic effects such as residual ensemble size
distributions, impurities, or solvent-related effects. The origin of the Stokes shift is elucidated
via first-principles calculations. Corresponding theoretical modeling of the CsPbBr3 NC …
[引用][C] Origin of the Size-Dependent Stokes Shift in CsPbBr3 Perovskite Nanocrystals
Z Jessica, D Sergiu, R Sergei, P John, K Masaru - 2017
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