Exciton transfer processes in ZnSe1-xTex

S. K. Chang, C. D. Lee, H. L. Park, C. H. Chung

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Abstract

Photoluminescence (PL) and photoluminescence excitation (PLE) spectroscopy of ZnSe1-xTex crystals has been investigated. At low Te concentration, x = 0.005, a free exciton peak as well as a broad emission band having phonon structure are observed in the PL spectra. The intensity of the free exciton luminescence increases with increasing temperature up to 50 K and above this temperature it decreases, while that of the blue band decreases monotonically. These features are interpreted in terms of the extrinsic self-trapping of excitons induced by Te atoms. In particular, the temperature behavior of the luminescence is explained by the back transfer of excitons from a self-trapped state to a free exciton state. The results are discussed by using configurational coordinate diagrams.

Original languageEnglish
Pages (from-to)793-796
Number of pages4
JournalJournal of Crystal Growth
Volume117
Issue number1-4
DOIs
Publication statusPublished - 1992 Feb 2

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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