Blue Shift of Optical Band Gap in ZnO Thin Film Grown by Spin Coating Process

Santhosh Prabhu, Dr. Dhananjaya Kekuda
Volume 1: Issue 2, April 2014, pp 88-89


Author's Information
Santhosh Prabhu1 
Corresponding Author
1Department of Physics, Manipal University, Manipal, Karnataka, India

Dr. Dhananjaya Kekuda2
2Department of Physics, Manipal University, Manipal, Karnataka, India

Research Article -- Peer Reviewed
Published online – 30 April 2014

Open Access article under Creative Commons License

Cite this article – Santhosh Prabhu, Dr. Dhananjaya Kekuda “Blue Shift of Optical Band Gap in ZnO Thin Film Grown by Spin Coating Process”, International Journal of Analytical, Experimental and Finite Element Analysis, RAME Publishers, vol. 1, issue 2, pp. 88-89, April 2014.
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Abstract:-
Optical band gap of ZnO thin films deposited on glass substrate by spin coating process was studied. The optical band gap of as-grown ZnO blue shifted from 3.11eV to 3.69 eV as the annealing temperature decreased from 300 to 100 °C. Also observed that there is a variation in the transmittance of ZnO thin film. X-ray diffraction measurements showed that samples deposited at 1000C, 2000C and 3000C consisted of amorphous phases without any prominent diffraction peaks. The AFM images showed that there is a decrease in the grain size, which is the evidence for the decrease in the transmittance..
Index Terms:-
Spin coating, UV-visible, XRD, AFM, Optical properties
REFERENCES
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  2. J. Tauc, Amorphous and Liquid Semiconductors Plenum, London, 1974.

  3. J. G. Lu, Z. Z. Ye, L. Wang, J. Y. Huang, and B. H. Zhao, “Mater. Sci. Semiconductor Process” 2003.

  4. Somnath C. Roy, G.L. Sharma and M.C. Bhatnagar “ Large blue shift in the optical band-gap of sol–gel derived Ba0.5Sr0.5TiO3 thin films” Volume 141, Issue 5, February 2007.


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