Magnetic field influence on optical properties of Cd_(1-x)Mn_xS (x = 0; 0.3) quantum dots: Photoluminescence study

摘要

We have synthesized CdS and Cdo.7Mno.3S nanocrystals with diameters of about 4.5 nm. These materials have been studied using photoluminescence spectroscopy with various excitation energies in the temperature range from 1.8 to 300 K, in magnetic field up to 5T. We registered surface and defect states as well as two Mn~(2+) energy levels that correspond to Mn~(2+) ions in two different crystal environments. We proposed the scheme of energy levels and transitions that explain obtained experimental results.