Binding energy and spatial extension of an off-centre donor impurity in ZnS/CdSe spherical core/shell nanostructures

Abstract : Coulomb correlation, binding energy and inter-particle distance of a donor impurity placed anywhere in the well region of a spherical core/shell nanostructure are studied in the framework of the effective mass approximation. Finite height barrier is used to describe conduction band offset between core and shell of the structure. Electron effective mass mismatch between core and shell and dielectric mismatch at the surface where core and shell materials meet are taken into account. Off-centre donor ground state energy is determined via Ritz variational principle using a trial wave function where Coulomb attraction between electron and ionized donor is considered. The theoretical approach developed is used to determine Coulomb correlation parameter, binding energy and spatial extension of the off-centre donor as functions of core to shell radii ratio for ZnS/CdSe core/shell nanostructures immersed in aqueous or organic solution.
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Journal of Optoelectronics and Advanced Materials, 2015, 17 (1-2), pp.151-159
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https://hal.univ-lorraine.fr/hal-01517444
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Soumis le : mercredi 3 mai 2017 - 11:40:29
Dernière modification le : mercredi 22 novembre 2017 - 10:56:01

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  • HAL Id : hal-01517444, version 1

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A. Ibral, A. Zouitine, El Mahdi Assaid, El Mustapha Feddi, F. Dujardin. Binding energy and spatial extension of an off-centre donor impurity in ZnS/CdSe spherical core/shell nanostructures. Journal of Optoelectronics and Advanced Materials, 2015, 17 (1-2), pp.151-159. 〈hal-01517444〉

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