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Article (Scientific journals)
Photoluminescence and Raman spectra of the ordered vacancy compound CuGa5Se8
Grossberg, Michael; Krustok, Jüri; Bodnar, I. et al.
2008In Physica B. Condensed Matter, p. 184-189
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Keywords :
CuGa5Se8; Chalcopyrite crystals; Raman spectroscopy; Photoluminescence; Ordered defect compounds; Potential fluctuations
Abstract :
[en] We studied the photoluminescence (PL) and Raman properties of the ordered defect compound CuGa5Se8. Twelve peaks were detected from the room-temperature Raman spectra with the A1 mode around 160 cm-1. Due to the stress in the polycrystalline thin film the corresponding frequencies of the Raman modes of a CuGa5Se8 single crystal were slightly shifted. One broad asymmetric PL band at 1.788 and 1.765 eV was observed at 10 K in the PL spectra of CuGa5Se8 single crystal and polycrystalline layer, respectively. The temperature and laser power dependencies of the PL spectra were also studied. The shape and properties of the PL band assure the presence of potential fluctuations and the analyses of the PL data suggest that the emission is due to band-to-tail (BT) or band-toimpurity (BI) recombination.
Disciplines :
Physics
Identifiers :
UNILU:UL-ARTICLE-2008-004
Author, co-author :
Grossberg, Michael;  Tallin University of Technology, Estonia
Krustok, Jüri;  Belarussian State University of Informatics and Radioelectroniks, Minsk, Belarus
Bodnar, I.;  Department of Chemistry, Belarussian State University of Informatics and Radioelectronics, Minsk, Belarus
Siebentritt, Susanne ;  Hahn-Meitner Institute, Berlin
Albert, Jürgen;  Hahn-Meitner Institute, Berlin
Language :
English
Title :
Photoluminescence and Raman spectra of the ordered vacancy compound CuGa5Se8
Publication date :
2008
Journal title :
Physica B. Condensed Matter
ISSN :
0921-4526
Publisher :
Elsevier Science, Amsterdam, Netherlands
Pages :
184-189
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 15 October 2013

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