Influence of Synthesis Temperature on the Properties of Ga-Doped ZnO Nanorods Grown by Thermal Evaporation

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Abstract:

This study examined the effect of the synthesis temperatures on the characteristics of vertically aligned Ga-doped ZnO (GZO) nanorods grown on a ZnO template by thermal evaporation using Zn and Ga sources. The increase in synthesis temperature at less than 700 °C induced stress relaxation relative to the ZnO template due to the suppression of defect generation by the formation of nanorods, while a further increase resulted in an increase in compressive strain due to dominant Ga doping. The increase in Ga concentration in the GZO nanorods with increasing synthesis temperature was also confirmed by X-ray photoelectron spectroscopy and photoluminescence. The best conductivity was observed in the GZO nanorods grown at 800 °C. On the other hand, the GZO nanorods synthesized at 900 °C showed less conductivity and weak near-band-edge emission properties due to the generation of defects from the excess Ga.

Keywords: CATALYST FREE; GA-DOPED; NANORODS; THERMAL EVAPORATION

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.3196

Publication date: January 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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