THE EFFECT OF THE NEIGHBORING IMPURITY ION ON THE ACCEPTOR INTERLEVEL LIGHT ABSORBTION BY CdSe NANOCRYSTALSTHE

摘要

By the use of the spherical multi-band approximation (in the case of strong spin-orbit coupling) of the Luttinger model, the calculation of the energy spectrum of holes in a spherical quantum dot has been done in the case of one and two ions of the acceptor impurity. The solution of the Schr"odinger equation was held by expanding an unknown wave function over the full system of wave functions describing a spherical quantum dot without impurities. The dependence of the energy levels of the hole on the impurities location has been defined. The results show the splitting of energy levels when impurities located not in the center of the spherical quantum dot. Also we compare energy levels in the cases of one and two impurities. Although energy values for these two cases are very different, the transition energies are quite close by the value wise. The influence of impurities on the interlevel transitions in the spherical quantum dot was determined. The selection rules of interlevel dipole absorption has been determined. The coefficient of light absorption caused by the interlevel transitions of holes has been calculated with respect to the quantum dots size dispersion. The obtained results are in good agreement with those of other theoretical works.