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Effects of an off-center donor impurity on the electronic and optical properties of a spherical ZnO/ZnS multi-shell quantum dot with a parabolic potential

M. EL KHOU1,* , E. A. IBNOUELGHAZI1, D. ABOUELAOUALIM1

Affiliation

  1. LN2E, Department of Physics, Faculty of Sciences Semlalia, Cadi Ayaad University, Marrakesh, Morocco

Abstract

Within the framework of the effective mass approximation, the electronic and optical properties of an electron confined in a spherical ZnO/ZnS multi-shell Quantum dot confined in a parabolic potential are investigated. We carry on the numerical calculations using the finite difference method (FDM) in order to find the electron’s energy eigenvalues and eigenstates, required in the computation of the binding energy for to the ground state and other excited states, in addition to the transition dipole moment (TDM) along the z-direction for the (1s) to (1p) transition state, under the influence of a perturbing potential corresponding to an off-center donor impurity, then we use all those parameters to compute the linear absorption coefficient for multiple impurity positions along the z-axis. The results show that the variation of the donor impurity’s position does have an impact on the electronic and optical properties of the confined electron, even though all the other parameters are kept fixed..

Keywords

Core/Shell/Shell/Shell Quantum dot, Parabolic potential, Off-center donor impurity, Finite difference method, Binding energy.

Submitted at: July 5, 2021
Accepted at: Feb. 11, 2022

Citation

M. EL KHOU, E. A. IBNOUELGHAZI, D. ABOUELAOUALIM, Effects of an off-center donor impurity on the electronic and optical properties of a spherical ZnO/ZnS multi-shell quantum dot with a parabolic potential, Journal of Optoelectronics and Advanced Materials Vol. 24, Iss. 1-2, pp. 56-63 (2022)