Transient Characteristics of Luminescence from Barrier-Doped ZnSe:Te-(CdSe)m(ZnSe)n Short-Period Superlattice Quantum Well*

Time-resolved photoluminescence spectra have been studied for ZnSe:Te-(CdSe)m (ZnSe)n short-period superlattice quantum well (SPSQW) for the first time. Decay of both free quantum-well excitons and self-trapped excitons located at spatially separated Te isoelectronic centers in ZnSe barrier was observed to be quite fast in the first 5 ns and then to slow down with a long lifetime tail of more than 10 ns. The influences of both Te content in the barrier and temperature on the equilibrium between the above free and trapped exciton states are discussed.