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- Title
Electronic and optical properties of an off-centre donor impurity in a WZ ZnS/ZnO/ZnS multishell spherical quantum dot.
- Authors
El Khou, M; Ibnouelghazi, E A; Abouelaoualim, D
- Abstract
In this study, a detailed investigation was done on the effects of changing the position of a donor impurity on the electronic and optical properties of an electron confined within a fixed size wurtzite (WZ) ZnS/ZnO/ZnS multishell quantum dot. We carried out the calculation using the framework of the effective mass approximation (EMA), relying entirely upon the non-degenerate quantum perturbation theory, using the unperturbed impurity-less eigenstates as expansion states. We computed the binding energy for the ground state and several other excited states as well as the transition dipole moment (TDM) along the z-direction for multiple electron state transitions. Finally, we concluded by computing the absorption coefficient for multiple transitions using perturbed electron states energy and transition dipole moments. The results show that the position of the donor impurity does have an impact on the electronic and optical properties of the confined electron.
- Subjects
QUANTUM perturbations; ZINC sulfide; QUANTUM dots; NON-degenerate perturbation theory; OPTICAL properties; ELECTRON energy states
- Publication
Pramana: Journal of Physics, 2022, Vol 96, Issue 2, p1
- ISSN
0304-4289
- Publication type
Article
- DOI
10.1007/s12043-022-02325-y