Abstract
Gallium doped zinc oxide (GZO) films have been prepared on glass substrates by the spray pyrolysis (SP) technique. The effects of thickness and annealing in air and oxygen on structural, electrical and optical properties of GZO thin films were investigated. As-deposited films were found polycrystalline with hexagonal structure that showed compressive stress along the c-axis. The compressive stress was found to decrease by thickness and by annealing in air or oxygen. The best characteristics have been obtained after heat treatment in oxygen, where the highest carrier concentrations have been achieved and with visible transmittance of 85–70% and resistivity of 4.21–2.25×10−3Ωcm with increasing thickness. The band gaps of oxygen annealed samples are found to have low values in comparison to air annealed and as deposited samples. The band gap dependence on the film thickness and annealing atmosphere is correlated to the shrinkage effect. Photoluminescence (PL) study was confirmed that broad visible emission in GZO films due to both the intrinsic traps and deep level vacancies.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
