Investigation of the effect of aluminum doped zinc oxide (ZnOAl) thin films by spray pyrolysis
Abstract
In this study, aluminum doped zinc oxide thin films were deposited on ordinary glass substrates at the temperature of 425°C by spray pyrolysis technique for various doping concentrations of aluminum ranging from 1 to 5 at.%. The effect of dopant concentration on structural, morphological and optical properties of ZnOAl thin films was studied. Optical band gap of the films increased with doping percentage and started to decrease from 2 at.% of dopant. The average transmittance for 2at.% ZnOAl film is significantly increased over 90% in the visible region at 450 nm which is crucial for optoelectronic applications. © 2016 Taylor and Francis Group, LLC.
Keywords
Energy gap
Optoelectronic applications
Glass substrates
ZnOAl thin films
Aluminum
Doping (additives)
Optical properties
Aluminum coatings
Optical films
Spray-pyrolysis techniques
Aluminum doped zinc oxides (ZnOAl)
Zinc oxide
Aluminum-doped zinc oxide thin films
Effect of dopants
Doping concentration
Pyrolysis
Oxide films
Zinc
Substrates
Thin films
Spray pyrolysis
Semiconductor doping