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

TL;DR

This paper presents an analytical model using the effective mass approximation to study the energy structure and optical properties of type-II semiconductor spherical core-shell quantum dots, validated by experimental spectra.

Contribution

It introduces a one-band effective mass model combined with elastic continuum approach to analyze heterostructure strain effects in core-shell quantum dots.

Findings

Simulated absorption spectra agree with experimental data.

Model effectively captures strain effects in heterostructures.

Provides insights into energy levels and oscillator strengths.

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.