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The influence of crystal imperfections on the shape of exciton emission spectrum in ZnO single crystals

Published online by Cambridge University Press:  15 July 2004

B. Bulakh ,
L. Khomenkova ,
V. Kushnirenko  and
I. Markevich
B. Bulakh
Affiliation:
Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 45 Prospect Nauky, Kyiv 03028, Ukraine
L. Khomenkova*
Affiliation:
Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 45 Prospect Nauky, Kyiv 03028, Ukraine
V. Kushnirenko
Affiliation:
Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 45 Prospect Nauky, Kyiv 03028, Ukraine
I. Markevich
Affiliation:
Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 45 Prospect Nauky, Kyiv 03028, Ukraine
*
[email protected]
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Abstract

A distortion of exciton emission spectrum, namely, relative decrease of free exciton band intensity with respect to that of its phonon replicas in undoped as-grown ZnO single crystals has been shown to result from enhanced reabsorption of shorter wavelength emission in the crystal due to formation of optical absorption tail. Some crystal imperfections, in all probability, dislocations decorated with shallow donors are supposed to be responsible for the effect.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 27 , Issue 1-3: Tenth International Conference on Defects: Recognition, Imaging and Physics in Semiconductors (DRIP X) , July 2004 , pp. 305 - 307
Copyright
© EDP Sciences, 2004

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