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Sintering Effects of ZnO Nanopowders Synthesized by Solution–Combustion Method

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Abstract:

ZnO nanopowders with an average grain size of 30nm were prepared by a solution combustion method with various sintering temperatures (100-1000o C). The optical properties of the ZnO nanopowders were investigated in the temperature range of 14-150K in air. Based on the results of XRD, Photoluminescence, and excitation spectra, the ZnO powders showed wurtzite single phase with UV-blue light emitting. Deep level defects such as oxygen vacancies and Zn interstitials were not observed from the ZnO powders sintered up to 700 o C. However, these defects were observed as the sintering temperature was increased up to 900 o C. This seems to be due to the generation of oxygen vacancies and zinc interstitials. Furthermore, the blue light intensity was doubled when the synthesized ZnO powders were sintered at 700 o C. This might be very useful for high efficiency photocatalysts and the blue light emitting phosphors of displays such as field emission displays and plasma display panels.

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Info:

Periodical:

Materials Science Forum (Volumes 486-487)

Pages:

221-224

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.486-487.221

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Cite this paper

Online since:

June 2005

Authors:

Sung Park, Jae Chun Lee, Jung Uk Seo, Ju Hyeon Lee

Keywords:

Deep Level Defect, Oxygen Vacancy, Photoluminescence (PL), Solution Combustion Method, Zn Interstitial, ZnO Nanopowder

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