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Effect of strain and quantum confinement on the electronic and optical properties in CdTe/ZnTe core/shell QDs

ZHANG WEI1, FEI XUENING1, WEI XIAOYIN1, DONG ERMING1, TANG HAO1, JIA GUOZHI1,*

Affiliation

  1. Tianjin Chengjian University , Tianjin China

Abstract

The electronic structures of CdTe/ZnTe core/shell structure quantum dots (QDs) has been investigated using the single-band effective mass approximationand first-order perturbation approximation theory. The electronic structure of CdTe/ZnTe QDs is a typical type-II band structure, andthe electron and hole carries would be localized in the core and shell regions respectively. The overlap integral of wave function of them and bandgap energy vary with the changing of core radius and/or shell thickness due to quantum confinement effect. The electronic and optical properties could be tuned by varying the size of QDs..

Keywords

Core/shell, Quantum dots, Strain effect, CdTe/ZnTe.

Citation

ZHANG WEI, FEI XUENING, WEI XIAOYIN, DONG ERMING, TANG HAO, JIA GUOZHI, Effect of strain and quantum confinement on the electronic and optical properties in CdTe/ZnTe core/shell QDs, Optoelectronics and Advanced Materials - Rapid Communications, 9, 3-4, March-April 2015, pp.367-371 (2015).

Submitted at: Feb. 12, 2015

Accepted at: March 19, 2015