Photo-induced changes of photoconductivity and exciton luminescence in ZnO crystals

In ZnO crystals, the drop of photoconductivity as well as the change of exciton luminescence intensity and spectrum shape were found to occur under light irradiation in 300–800 K temperature range. The initial characteristics were restored with time in dark. Observed effects were shown to result fro...

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Veröffentlicht in:	Physica Status Solidi (b) 2007-05, Vol.244 (5), p.1549-1552
Hauptverfasser:	Markevich, I. V., Kushnirenko, V. I., Bulakh, B. M.
Format:	Artikel
Sprache:	eng
Schlagworte:	66.30.Lw 68.43.Tj 72.40.+w 78.55.Et Condensed matter: electronic structure, electrical, magnetic, and optical properties Electronic transport in condensed matter Exact sciences and technology Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Other solid inorganic materials Photoconduction and photovoltaic effects photodielectric effects Photoluminescence Physics
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Beschreibung
Zusammenfassung:	In ZnO crystals, the drop of photoconductivity as well as the change of exciton luminescence intensity and spectrum shape were found to occur under light irradiation in 300–800 K temperature range. The initial characteristics were restored with time in dark. Observed effects were shown to result from the variation of shallow donor density in the surface layer of the crystal. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:	0370-1972 1521-3951
DOI:	10.1002/pssb.200675136