In:
Nano, World Scientific Pub Co Pte Ltd, Vol. 07, No. 02 ( 2012-04), p. 1250013-
Abstract:
ZnSnO 3 nanowires were synthesized on Si substrates by thermal evaporation of a mixture of ZnO, SnO 2 and graphite powders. The nanowires were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and photoluminescence spectroscopy. The ZnSnO 3 nanowires varied from 10 to 100 nm in diameter and up to a few hundred of micrometers in length. Transmission electron microscopy and X-ray diffraction revealed that the nanowires are multiphase nanostructures containing ZnSnO 3 , Zn 2 SnO 4 , ZnO, and SnO 2 phases. Photoluminescence measurements showed that ZnSnO 3 nanowires had a sharp ultraviolet emission peak at approximately 375 nm as well as a broad green emission band centered at approximately 510 nm. The violet emission of ZnSnO 3 nanowires exhibits a blue shift by approximately 5 nm compared to that of ZnO nanowires and the visible emission of ZnO nanowires shifted from the orange region to the green region, which should be attributed to the narrowing of E g . Thermal annealing enhanced the green emission but degraded the ultraviolet emission of the ZnSnO 3 nanowires. In addition, the origin of the enhanced luminescence of ZnSnO 3 nanowires compared to ZnO and SnO 2 nanowires is discussed.
Type of Medium:
Online Resource
ISSN:
1793-2920
,
1793-7094
DOI:
10.1142/S1793292012500130
Language:
English
Publisher:
World Scientific Pub Co Pte Ltd
Publication Date:
2012
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