Emission of Light from Compositionally Graded CdSSe/CdS Heterostructure with Smooth Near-surface Excitonic Potential

The low-temperature ( T = 2 K) optical spectra (transmission, reflection and luminescence) of a compositionally graded CdS 1 –  x Se x /CdS heterostructure with a low Se content near the sample surface were studied. The Morse potential model of the near-surface exciton potential well is shown to be...

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Bibliographic Details
Published in:Semiconductors (Woodbury, N.Y.) N.Y.), 2019-12, Vol.53 (16), p.2052-2054
Main Authors: Grigorieva, N. R., Sel’kin, A. V.
Format: Article
Language:English
Subjects:
Excitons
Excitons in Nanostructures
Heterostructures
Light emission
Low temperature
Magnetic Materials
Magnetism
Morse potential
Physics
Physics and Astronomy
Radiative recombination
Reflection
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Summary:The low-temperature ( T = 2 K) optical spectra (transmission, reflection and luminescence) of a compositionally graded CdS 1 –  x Se x /CdS heterostructure with a low Se content near the sample surface were studied. The Morse potential model of the near-surface exciton potential well is shown to be in a good agreement with the experimental data on the excitonic reflection and makes it possible to identify the radiative recombination channels of free and localized excitons in the structure under study.
ISSN:1063-7826
1090-6479
DOI:10.1134/S1063782619120108