Structural and Optical Properties of Sol-gel Prepared ZnO Thin Film

By Nanda Shakti, P. Gupta. 2010

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In this work we have studied the structural and optical properties of ZnO thin films prepared by sol-gel spin coating process. Zinc acetate dihydrate was used as the precursor material. Thin films of ZnO were prepared on Quartz substrate post annealed at 400oC, 500oC and 600oC. X-ray diffraction (XRD) of the films showed polycrystalline nature. Scherrer’s formula was used to calculate crystallite size. Scanning electron microscopy (SEM) study showed granular surface. The refractive index, extinction coefficient and thickness of the films were measured with spectroscopic Ellipsometry. The band gap and Urbach energy were calculated. The photoluminescence measurement revealed UV emission at ~ 380 nm.

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Polymers and Plastics

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