Exciton transfer processes in ZnSe1-xTex

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

doi:10.1016/0022-0248(92)90858-G

Exciton transfer processes in ZnSe_1-xTe_x

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

Department of Physics

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

Photoluminescence (PL) and photoluminescence excitation (PLE) spectroscopy of ZnSe_1-xTe_x 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 language	English
Pages (from-to)	793-796
Number of pages	4
Journal	Journal of Crystal Growth
Volume	117
Issue number	1-4
DOIs	https://doi.org/10.1016/0022-0248(92)90858-G
Publication status	Published - 1992 Feb 2

Bibliographical note

Funding Information:
This work was fully supported by Ministry of Education of Korea through ISRC.

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/0022-0248(92)90858-G

Cite this

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title = "Exciton transfer processes in ZnSe1-xTex",

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.",

author = "Chang, {S. K.} and Lee, {C. D.} and Park, {H. L.} and Chung, {C. H.}",

note = "Funding Information: This work was fully supported by Ministry of Education of Korea through ISRC.",

year = "1992",

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doi = "10.1016/0022-0248(92)90858-G",

language = "English",

volume = "117",

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T1 - Exciton transfer processes in ZnSe1-xTex

AU - Chang, S. K.

AU - Lee, C. D.

AU - Park, H. L.

AU - Chung, C. H.

N1 - Funding Information: This work was fully supported by Ministry of Education of Korea through ISRC.

PY - 1992/2/2

Y1 - 1992/2/2

N2 - 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.

AB - 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.

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