Numerical modeling for computation of confined energy states in oblate spheroidal quantum dots: effect of dot size, eccentricity and surrounding matrix
Department of Physics, Manav Rachna University, 121004, Faridabad, Haryana, India
Accepted: 22 November 2021
Published online: 1 December 2021
We analytically and numerically investigate the energy states of an electron confined in the conduction band of oblate spheroidal CdSe quantum dot with finite barrier height. The Schrodinger equation is solved numerically in appropriate spheroidal coordinate system. The various energy states have been calculated as a function of dot volume and eccentricity of the spheroid. It is observed that with increasing the volume of the quantum dot, the energy decreases. However, with the increasing eccentricity, the energy increases. We also found that the energy states corresponding to lower value of have higher energy and higher value of have lower energy. In addition, we obtain transition energies for (1S-1P) and (1P-1D) transitions and we found that with increasing dot size, the transition energy decreases. Also, it is observed that surrounding matrix significantly affects the transition energy values. The results of energy states of confined electron in oblate spheroidal quantum dot are compared with that of spherical quantum dot and the results reveal that they are found at different positions.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021