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Thermal broadening of excitons in CdZnTe/ZnTe single quantum wells

Authors
Journal
Journal of Crystal Growth
0022-0248
Publisher
Elsevier
Publication Date
Volume
117
Identifiers
DOI: 10.1016/0022-0248(92)90793-i
Disciplines
  • Physics

Abstract

Abstract Exciton luminescence is studied in a series of Cd 0.33Zn 0.67Te/ZnTe single quantum wells as a function of temperature. We find that the broadening of the exciton line with temperature is consistent with LO-phonon scattering. The homogeneous linewidths of the samples versus temperature are extracted by a deconvolution procedure. The average phonon coupling parameter Γ ph for these samples is found to be 15 meV. This value of Γ ph is surprisingly only 1.5 times greater than GaAs single quantum well samples and is the reason why strong exciton resonances are observed at room temperature in these Cd 0.33Zn 0.67Te materials.

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