Journal
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
Volume 26, Issue 1, Pages 23-27Publisher
WUHAN UNIV TECHNOLOGY
DOI: 10.1007/s11595-011-0160-1
Keywords
Na-doped ZnO thin films; sol-gel method; microstructure; optical properties
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Funding
- National Natural Science Foundation of China [50872001]
- Research Fund for the Doctoral Program of Higher Education of China [20060357003]
- Talent Foundation of Anhui Province [2004Z029]
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Na-doped ZnO thin films were deposited on the glass substrates using sol-gel method. The effect of Na concentrations on the structural and optical properties of ZnO films was studied. As Na concentration increases from 0.0 at% to 16.0 at%, preferential c-axis orientation becomes more and more obvious, and the intensity of the diffraction peaks from (103) increases. The optical band gap E-g value increases from 3.261 to 3.286 eV first and then decreases as Na concentration increases from 0.0 to 2.0 at% and then beyond 2.0 at%. The intensity of all the emissions increases with increasing Na concentration and the origins of the violet emission (wavelength in the 400-407 nm) and the blue emission (wavelength at 473 nm) were discussed in detail.
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