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Electronic Properties of Exciton in Mg Based II–VI Wide Band Gap Semiconducting Quantum Dots

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Electronic properties of exciton in Mg based ZnS, ZnSe and ZnTe wide band gap semiconductor cylindrical quantum dots are investigated taking into consideration of geometrical confinement effect. The confinement potentials for various concentrations of Mg alloy content in Zn1–x Mg x S/MgS, Zn1–x Mg x Se/MgSe and Zn1–x Mg x Te/MgTe quantum dots are studied and the constant barrier height is maintained for the Mg content in all the three heterostructures (Zn0.9Mg0.1S/MgS, Zn0.25Mg0.75Se/MgSe and Zn0.09Mg0.91Te/MgTe) to obtain the exciton binding energies and the optical transition energies. The results show that the band gap increases nonlinearly with the increase of composition of Mg alloy content in the taken materials due to the positive band gap bowing parameters and the exciton binding energies in Zn0.9Mg0.1S/MgS quantum dot are found to be more than the other two dots taken for studies. Our results will be helpful for some potential applications in full colour display devices and optical data storage devices.
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Keywords: ELECTRONIC STATES; EXCITON; QUANTUM DOT

Document Type: Research Article

Publication date: March 1, 2017

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  • Journal of Advanced Physics is an interdisciplinary peer-reviewed journal consolidating research activities in all experimental and theoretical aspects of advanced physics. The journal aims in publishing articles of novel and frontier physics that merit the attention and interest of the whole physics community. JAP publishes review articles, full research articles, short communications of important new scientific and technological findings in all latest research aspects of physics.
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