TITLE

Spatially resolved investigations of the emission around 3.31 eV (A-line) from ZnO nanocrystals

AUTHOR(S)
Kurbanov, S. S.; Panin, G. N.; Kang, T. W.
PUB. DATE
November 2009
SOURCE
Applied Physics Letters;11/23/2009, Vol. 95 Issue 21, p211902
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
ZnO nanocrystals grown by chemical solution deposition were studied by means of photoluminescence and cathodoluminescence spectroscopy. A postgrown annealing treatment significantly improved the UV emission efficiency and resulted in the clear appearance of a low temperature emission band around 3.31 eV (so-called A-line). Spatially and wavelength resolved cathodoluminescence measurements revealed a spotlike distribution of the A-line emission on a nanocrystal surface. It is found that there is a strong correlation between the emission around 3.31 eV and the specklike defects on the nanocrystal surface that appeared after annealing. The origin of the A-line and the specklike defects are discussed.
ACCESSION #
45478126

 

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