Journal
APPLIED SURFACE SCIENCE
Volume 252, Issue 5, Pages 1561-1567Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2005.02.137
Keywords
AZO films; substrate temperature; post-deposition annealing; pulsed laser deposition
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Highly transparent conductive Al2O3 doped zinc oxide (AZO) thin films have been deposited on the glass substrate by pulsed laser deposition technique. The effects of substrate temperature and post-deposition annealing treatment on structural, electrical and optical properties of AZO thin films were investigated. The experimental results show that the electrical resistivity of films deposited at 240 degrees C is 6.1 X 10(-4) Omega CM, which can be further reduced to as low as 4.7 x 10(-4) Omega cm by post-deposition annealing at 400 degrees C for 2 h in argon. The average transmission of AZO films in the visible range is 90%. The optical direct band gap of films was dependent on the substrate temperature and the annealing treatment in argon. The optical direct band gap value of AZO films increased with increasing annealing temperature. (c) 2005 Elsevier B.V. All fights reserved.
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