Abstract
We have investigated, in this paper, the simultaneous effect of eccentricity and encapsulating matrix on the effective dielectric function εeff in spheroid-shaped CdSe/ZnSe core/shell quantum dot. The calculations of electronic energy levels and the corresponding wavefunctions were carried out by solving the stationary Schrodinger equation assuming the Effective Mass Approximation (EMA) and taking in consideration the Compact Density Matrix (CDM). The investigated effective dielectric constant εeff is very important due to its relevance in the manipulation of the optoelectronic properties as required in the design of new sophisticated devices. It turned out that the embedding matrix has a great effect on the resonance peaks of εeff. Also, the eccentricity, key parameter in spheroid-shaped core/shell structure, play a fundamental role in the manipulation of the energy levels, transition energies as well as the effective dielectric function resonance peaks.
•Calculation of the energy levels and the wavefunctions of an electron in CdSe/ZnSe spheroid-shaped quantum dot embedded in a matrix (BZT, PVA or PI).•Investigation of the effect of the encapsulating matrix on the energy levels and the transition energies.•Calculation of eeff of the structure and conclude about the influence of the eccentricity or the exciting intensity behind the capping matrix effect.•Obtaining the bleaching of the peaks of the imaginary part of εeff for extremely high exciting intensity.