Abstract
Progressive technologies in the synthetic chemistry of semiconductor nanostructures have made it possible to access high quality semiconductor nanostructures with precise size, shape and composition. Colloidal core/shell nanocrystals are composed of a core made from one material terminated by a shell of another material. Because of the improved photoluminescence quantum yields, high photostability and size-tunable emission properties, core/shell nanocrystals are tremendously attractive for the active applications. The purpose of this chapter is to present the atomistic tight-binding theory to study the electronic structures and optical properties of core/shell nanocrystals with the purpose to evidently understand the significance of core and growth shell. Owing to the heterostructure of core/shell nanocrystal, the valence force field method is utilized to optimize the structural geometry. To analyze the electronic structures and optical properties of the core/shell nanocrystals with the corresponding structural parameters, some of the calculations are demonstrated. Finally, all-inclusive information based on atomistic tight-binding theory successfully conveys the natural behaviors of core/shell nanocrystals and carries a guideline for the design of their electronic and optical properties before applying to the novel electronic nanodevices.
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Sukkabot, W. (2022). Atomistic Tight-Binding Study of Core/Shell Nanocrystals. In: Ünlü, H., Horing, N.J.M. (eds) Progress in Nanoscale and Low-Dimensional Materials and Devices. Topics in Applied Physics, vol 144. Springer, Cham. https://doi.org/10.1007/978-3-030-93460-6_23
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