Effects of Temperature and Hydrostatic Pressure on Binding Energy of an Exciton in a Spherical Quantum Dot

Abstract

The binding energies of the heavy-hole and light-hole exciton in a GaAs spherical quantum dot have been calculated using variational technique within effective mass approximation. The effect of pressure and temperature are also analyzed. Our result shows that exciton binding energy (i) decreases as the dot radius increases, (ii) further increases with increase in pressure and decreases with increase in temperature, and (iii) approaches zero as dot size approaches infinity. All the calculations have been carried out with finite models and results are compared with exciting literatures. [DOI: 10.1380/ejssnt.2014.358]