Temperature dependence of the band-edge photoluminescence of Zn1−xMnxSe films

Abstract

We report a systematic investigation of band-edge photoluminescence of the diluted magnetic semiconductor alloy Zn1-xMnxSe for a series of compositions (0 0.20 the effect of inhomogeneous broadening Gamma(inh) on Gamma(T) was found to be stronger than that of the longitudinal optical phonon term Gamma(LO). Furthermore, the activation energies of thermal quenching were obtained for both the I-2 and the I-1 peaks from the temperature dependence of the bound exciton peaks, and were found to decrease with increasing Mn concentration. Finally, we show that at high temperature the broadening of the FWHM is dominated by the LO-phonon interaction.ope