Luminescence Decay in Deep Quantum Wells CdTe/Cd0.5Mn0.5Te at Room Temperature
L. Kowalczyka, S. Fanceyb, G.S. Bullerb, J.S. Massab, M. Kutrowskia, E. Janika, G. Karczewskie, T. Wojtowicza, A.K. Zakrzewskia and J. Kossuta
aInstitute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland
bDepartment of Physics, Heriot-Watt University, Edinburgh, Great Britain
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Time-resolved photoluminescence was used to study exciton recombi­nation in deep CdTe/Cd0.5Mn0.5Te single quantum well. The width of the investigated well was 100 A. The study was performed at room temperature. The lifetime of the exciton determined in this work has a value comparable to that observed in shallow CdTe/Cd0.85Mn0.15Te quantum wells. A strong enhancement of the photoluminescence decay time with increasing intensity of the exciting laser beam is observed which is indicative of saturation of the non-radiative recombination centers.
DOI: 10.12693/APhysPolA.87.508
PACS numbers: 78.47.+p, 78.55.Et, 78.66.Hf