Keywords
Thin films
Co and F cooping
TCO
spray pneumatic method
How to Cite
Abstract
In this work, Co- and F-codoped NiO thin films were successfully deposited on glass substrates using a pneumatic spray deposition method at 420 °C. The influence of temperature and dopant concentrations on the electrical and optical properties of the films was systematically investigated. Electrical measurements were performed in two stages, based on the evaluation of voltage and current over the temperature range of 30–180 °C. It was observed that temperature significantly affected the voltage and current, with optimum values obtained at higher temperatures. The lowest electrical resistivity was achieved for the film doped with 2% Co and 12% F. Optical analysis indicated that the Co- and F-codoped NiO films exhibited high transparency in the visible region. Furthermore, the optical band gap increased with higher Co and F concentrations in all deposited samples. The minimum Urbach energy, 0.342 eV, was observed for the film containing 2% Co and 8% F, indicating reduced localized states in the band tails and improved optical quality.
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