Publications by authors named "Laxman Tatikondewar"
Theoretical investigation of energy gap bowing in CdSSe alloy quantum dots.
Phys Chem Chem Phys
June 2017
Article Synopsis
- The study investigates energy gap bowing in CdSSe quantum dots compared to bulk materials using density functional theory for different compositions and sizes.
- The bowing constant is found to be slightly higher in quantum dots, primarily due to shifts in LUMO energies, while HOMO energies remain relatively stable.
- Variations in the lattice constant from alloying influence the hybridization of states, and the research includes analysis of shape dependence in the electronic structure to enhance understanding for future applications of CdSSe quantum dots.
The absolute electronic energy levels in Hg-doped CdTe semiconductor nanocrystals (CdHgTe NCs) with varying sizes/volumes and Hg contents are determined by using cyclic voltammetry (CV) measurements and density functional theory (DFT) -based calculations. The electrochemical measurements demonstrate several distinct characteristic features in the form of oxidation and reduction peaks in the voltammograms, where the peak positions are dependent on the volume of CdHgTe NCs as well as on their composition. The estimated absolute electronic energy levels for three different volumes, namely 22, 119 and 187 nm(3) with 2.
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