ZnTe/CdSe type-II core/shell spherical quantum dot under an external electric field
Keywords:CORE/SHELL MATERIALS, NANOSTRUCTURES, QUANTUM DOTS, ELECTRIC FIELD
We have investigated in the framework of the envelope function approximation and taking into account the dependence of the electron effective mass on radius the energy of an electron inside a ZnTe/CdSe core/shell spherical quantum dot. In order to make the problem more realistic, we describe the conduction band-edge alignment between core and shell materials by a finite height barrier. By applying the Ritz variational principle the effect of the electric field on the electronic states was also examined. Our numerical results shows the opportunity to control the energy states position of the charge carriers inside our core/shell nanostructures by controlling the size (core radius, shell thickness) of the nanostructure and the strength of the external electric field.
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