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

Nanda Shakti, P.S. Gupta


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.

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Applied Physics Research   ISSN 1916-9639 (Print)   ISSN 1916-9647 (Online)   Email:

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