Effect of position-dependent effective mass on donor impurity- and exciton-related electronic and optical properties of 2D Gaussian quantum dots
Date
2022Metadata
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Using the compact density matrix scheme and the effective mass approximation, we study the influence of positiondependent
electron and heavy-hole mass distributions on the impurity-related electronic properties, excitonic binding, and intersubband
electron transitions in a two-dimensional quantum dot with Gaussian potential. The electronic structure has been obtained by
using the two-dimensional diagonalization method. The obtained results show the significant influence of the functional form of the
spatial mass distribution and structural geometry on the accurate determination of the impurity-related electronic structure, optical
response, electron–hole overlap, and, therefore, the carrier lifetimes in the optoelectronic devices based on quantum dots.