Temperature quenching of intracenter luminescence of Mn2+ ions in diluted magnetic semiconductors

Abstract

The temperature dependence of the spectral composition and intensity of intracenter luminescence of the Mn²⁺ 3d shell and the temperature dependence of the luminescence excitation spectra in an epitaxial layer of Cd_0.2Mn_0.8Te at different levels of optical excitation are investigated. It is found that in the crystals of type II_1–xMn_xVI with a high concentration of manganese, the characteristics of intracenter luminescence of Mn²⁺ depend on the efficiency of excitation migration over manganese ions. Under migration conditions, the luminescence quantum yield is determined by the cooperative effect (up-conversion).