Time resolved photoluminescence study of the wide (Cd,Mn)Te/(Cd,Mg)Te quantum well

Abstract

The static and dynamic properties of excitons and trions in a 80 nm wide Cd1-xMnxTe/Cd0.7Mg0.3Te quantum well with extremely small Mn content (x = 0:00027) have been studied by means of time-integrated and time- -resolved photoluminescence experiment at low and elevated temperatures. The trion binding energy has been estimated to be 2.6 ± 0.8 meV. The exciton and trion lifetimes have been measured to be ~ 150 ps, and ~ 200 ps, respectively. The temperature dependence of both lifetimes together with the multicomponent character of the PL decay process suggest a spatial localization of excitons and trions in the investigated quantum well.