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

摘要

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