EXCITON DYNAMICS IN CD0.33ZN0.67TE ZNTE SINGLE QUANTUM-WELLS/

A series of Cd0.33Zn0.67Te/ZnTe single quantum wells of thickness 40 a ngstrom, 70 angstrom and 100 angstrom are studied using CW and time-re solved photoluminescence techniques. The exciton-phonon interaction is found to decrease with decreasing well thickness, this result having implications for room temperature devices. Time-resolved measurements reveal photoluminescence lifetimes increasing with temperature showing that the recombination at low temperatures is predominantly radiative . This is an indication of very high material quality. To our knowledg e, such behaviour has not been observed previously in II-VI materials.