Investigation of structural,optical and luminescent properties of sprayed N-doped zinc oxide thin films |
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| Institution: | 1. Materials Science and Engineering Department, University of Texas at Arlington, Arlington, TX 76019, United States;2. Department of Biomedical Sciences, Texas A&M Health Science Center, Baylor College of Dentistry, Dallas TX 75246, United States;3. School of Medicine and Public Health, Univ. Wisconsin, Madison, WI 53715, United States |
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| Abstract: | N-doped ZnO (NZO) thin films are synthesized via spray pyrolysis technique in aqueous medium treating zinc acetate and N,N-dimethylformamide as precursors. Influence of N doping on structural, optical and luminescence properties have been investigated. Films are nanocrystalline having hexagonal crystal structure. Raman analysis depicts an existence of N ZnO structure in NZO thin film. XPS spectrum of N 1s shows the 400 eV peak terminally bonded, well screened molecular nitrogen (γ-N2). Lowest direct band gap of 3.17 eV has been observed for 10 at% NZO thin film. The UV, blue, and green deep-level emissions in photoluminescence of NZO films are due to Zn interstitials and O vacancies. |
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