Time-resolved photoluminescence studies of free excitons in CuInS2 crystals
- 6 May 2002
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 80 (18) , 3316-3318
- https://doi.org/10.1063/1.1476960
Abstract
The time-resolved photoluminescence of free excitons in bulk single-crystal grown by the traveling heater method is examined. The decay of free exciton emission exhibits a double exponential curve at low temperature. The decay-time constant of the fast component increases monotonically with excitation density, whereas that of the slow component appears to be independent of excitation density. From this result, the fast and slow components are attributed to nonradiative and radiative recombination processes, respectively. The radiative lifetime of free excitons is estimated to be at 10 K.
Keywords
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