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- Title
Modelling of density of states and energy level of chalcogenide quantum dots.
- Authors
Ahamed, M. Irshad; Ahamed, Mansoor; Muthaiyan, R.
- Abstract
Quantum dots (QDs) or semiconductor nanocrystals are luminous materials with unique optical properties that can be fine-tuned by varying the size of the material. Chalcogenide QDs show strong quantum confinements effects owing to the fact that the exciton Bohr radius is much larger than the particle size, and tunable energy bandgap leads to widespread technological interest in near-infrared optical devices. In this communication, one dimensional Cu2SnS3 and PbSexS1-x QDs is modeled by a particle in a box model which was used to compute energies and density of states. The density of states and the energy level of QDs are determined as a function of the strengths of the potential walls of the inner box. The results exhibit that the density of states decreases exponentially with an increase in the energy level of QDs. The density of states at lower energy levels is more significant than what is observed in higher energy levels.
- Subjects
ENERGY level densities; QUANTUM dots; QUANTUM confinement effects; EXCITON theory; DENSITY of states; SEMICONDUCTOR nanocrystals; CHALCOGENIDES
- Publication
International Review of Applied Sciences & Engineering, 2022, Vol 13, Issue 3, p42
- ISSN
2062-0810
- Publication type
Article
- DOI
10.1556/1848.2021.00288