Modelling photooxidation of CdSe-ZnS nanocrystals

Kohary, K. ; Gibson, G. A.

HP Development Company

关键词: photoluminescence;    photooxidation;    CdSe nanocrystals;    oxygen diffusion;   

RP-ID  :  HPL-2010-140

学科分类：计算机科学（综合）

美国|英语

来源: HP Labs

【 摘 要 】

We model the blueshift of the photoluminescence spectra of CdSe-ZnS nanocrystals under ultraviolet irradiation. The model is based on photo-assisted oxygen diffusion into the CdSe nanocrystal structure, which is believed to have a primary role in the observed blueshift of the photoluminescence peak wavelength by reducing the confinement core radius of the exciton wavefunction inside the CdSe nanocrystal core. We compare the predictions of this model with experimental data.