A structural and optical properties of Cu‑doped ZnO films prepared by spray pyrolysis
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2020-01-09
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Abstract
Pure and Cu doped ZnO films were grown by ultrasonic spray pyrolysis onto glass substrates at 450 °C for 30 min. This
study aims to investigate the influence of Cu doping content [0.02–0.20] on structural, microstructural and optical properties. X-ray diffraction analysis reveals a structural disorder depending on Cu loading besides the appearance of CuO phase.
The doping effectiveness is revealed by EDX analysis of the chemical composition of the films. The transmittance shows
a decreasing tendency with increasing Cu concentration. The refractive indices increase, whereas the values of forbidden
energy gap decrease with the increase in Cu dopant concentration.