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Theoretical approach for type-i semiconductor spherical core-shell quantum dots heterostructure with wide band gaps

T. O. CHECHE1,* , V. BARNA1, I. STAMATIN1,2

Affiliation

  1. University of Bucharest ,Faculty of Physics, Bucharest – Magurele 077125, Romania
  2. University of Bucharest ,Faculty of Physics, 3Nano-SAE Res Centre, Bucharest-Magurele 077125, Romania

Abstract

Within the effective mass approximation a one-band model is adopted to obtain the energy structure and the oscillator strength of type-I semiconductor spherical core-shell quantum dot heterostructure. The core-shell lattice mismatch strain is modeled by the elastic continuum approach. The model is applied to CdTe/ZnSe, a wide band gap type-I heterostructure. We obtain a fair agreement between the simulated absorption spectrum and the available experimental results..

Keywords

Quantum Dots, Core-Shell, Absorption Spectrum.

Submitted at: Feb. 17, 2013
Accepted at: July 11, 2013

Citation

T. O. CHECHE, V. BARNA, I. STAMATIN, Theoretical approach for type-i semiconductor spherical core-shell quantum dots heterostructure with wide band gaps, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 7-8, pp. 615-620 (2013)