Structural and Optical Properties of Sol-gel Prepared ZnO Thin Film
Author(s) -
Nanda Shakti,
Partha Sarathi Gupta
Publication year - 2010
Publication title -
applied physics research
Language(s) - English
Resource type - Journals
eISSN - 1916-9647
pISSN - 1916-9639
DOI - 10.5539/apr.v2n1p19
Subject(s) - materials science , crystallite , thin film , sol gel , scanning electron microscope , refractive index , band gap , scherrer equation , analytical chemistry (journal) , substrate (aquarium) , molar absorptivity , ellipsometry , diffraction , optics , composite material , nanotechnology , optoelectronics , chemistry , chromatography , oceanography , physics , geology , metallurgy
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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