PHOTOLUMINESCENCE PROPERTIES OF THE DILUTED MAGNETIC SEMICONDUCTORS ZINC(1-X)MANGANESE(X)SELENIDE AND CADMIUM(1-X)MANGANESE(X)SELENIDE.

摘要

Time-resolved and cw photoluminescence measurements were carried out on the diluted magnetic semiconductors Zn{dollar}sb{lcub}rm 1-x{rcub}{dollar}Mn{dollar}sb{lcub}rm x{rcub}{dollar}Se and Cd{dollar}sb{lcub}rm 1-x{rcub}{dollar}Mn{dollar}sb{lcub}rm x{rcub}{dollar}Se; high manganese concentration was emphasized.; Zn{dollar}sb{lcub}rm 1-x{rcub}{dollar}Mn{dollar}sb{lcub}rm x{rcub}{dollar}Se samples with 0 {dollar}le{dollar} x {dollar}le{dollar} 0.49 were investigated; four emission bands at {dollar}sim2.15{dollar}eV, {dollar}sim2.03{dollar}eV, {dollar}sim1.95{dollar}eV, and {dollar}sim1.35{dollar}eV were observed. The bands of {dollar}sim2.15{dollar}eV, {dollar}sim2.03{dollar}eV, and {dollar}sim1.95{dollar}eV were ascribed to Mn{dollar}sp{lcub}2+{rcub}{dollar} {dollar}sp4{dollar}T{dollar}sb1{dollar} {dollar}to{dollar} {dollar}sp6{dollar}A{dollar}sb1{dollar} intraion transition, self-activated emission, and copper related emission, respectively. The temperature dependences and decay characteristics of these three bands were investigated for 18 {dollar}{dollar} 2.3eV, but two photon excitation of the {dollar}sim2.13{dollar}eV band or a similar mechanism is needed to explain the results of h{dollar}nusb{lcub}rm ex{rcub}{dollar} {dollar}<{dollar} 2.3eV.