Stretched-exponential decay of the luminescence in ZnSeZnTe superlattices

The photoluminescence decay of fractional-layer superlattices of ZnSeZnTe has been measured to investigate the origin of “slow-bands” (K. Suzuki et al. [4]). The decay of this band is found to be well described by a stretched exponential function. Distributions of effective life-time of excitons at...

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Bibliographic Details
Published in:Solid state communications 1998-03, Vol.105 (9), p.571-575
Main Authors: Suzuki, K., Bley, G., Neukirch, U., Gutowski, J., Takojima, N., Sawada, T., Imai, K.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Ii-vi semiconductors
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of specific thin films
Photoluminescence
Physics
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Summary:The photoluminescence decay of fractional-layer superlattices of ZnSeZnTe has been measured to investigate the origin of “slow-bands” (K. Suzuki et al. [4]). The decay of this band is found to be well described by a stretched exponential function. Distributions of effective life-time of excitons at several wavelength positions of the bands are derived from the stretched exponential parameters with which the decay is fitted. From the distributions, the radiative life-time of localized excitons in the slow bands are estimated to be 10–20 ns.
ISSN:0038-1098
1879-2766
DOI:10.1016/S0038-1098(97)10183-1