Analytical approach for type-II semiconductor spherical core–shell quantum dots heterostructures with wide band gaps

Abstract

A one-band model within the effective mass approximation is adopted to characterize the energy structure and oscillator strength of type-II semiconductor spherical core–shell quantum dots. The heteroepitaxial strain of the core–shell heterostructure is modeled by the elastic continuum approach. The model is applied to ZnTe/ZnSe core–shell, a wide band gap type-II heterostructure. The simulated absorption spectra are in fair agreement with available experimental results.