Abstract:
In this research work the role of
annealing temperature on optical properties of
ZnO thin films prepared by spray pyrolysis
method at a substrate temperature of 573K has
been studied. The optical properties of asdeposited
samples and samples annealed at 573K
and 673K were investigated in the wavelength
range of 380-750nm using a double beam UV-VISNIR
spectrophotometer. The results showed that
all the films have direct optical transition and
showed the larger values of optical transparency
(greater than 80%) with increase in annealing
temperatures. The optical band gap energy was
found to be in the range of 3.2-3.85 eV with
increasing annealing temperature. Similarly other
optical parameters were found to improve
appreciably with increase in annealing
temperature.
