Author : Mohammed Sh. Essa and Bahaa T. Chiad

This study presents the effect of the heated platform speed during spray process on the structural and optical properties of copper oxide thin films deposited by spray pyrolysis technique. Copper oxide (CuO) thin films were sprayed on heated microscopic slide substrates by using home-made Fully Computerized Spray Pyrolysis Deposition (FCSPD). Fixed substrate temperature of 450 ℃, nozzle to substrate distance (NSD) was kept at 30 cm, and fixed molar concentration of copper (II) chloride as a precursor was used. In addition to that Sprayed this film were carried out at different deposition speed 3, 4, 5, and 6 mm/s. The structural, optical properties, were determined by using X-ray diffraction method, and UV-Vis spectrophotometer. The XRD spectra showed that all sample polycrystalline structure with different quality structure depending on deposition speed, the better crystallinity was found at 6mm/s, and all sample have two preferred orientations along the (111), (-111). The grain size and lattice parameter were investigated as a function of deposition speed. Transmittance spectra exhibit small divergence in transmittance value along the sample at different examined position and deposition speed was measured the transmittance on it. A lower value to this variance in the divergence detected at 3, 6 mm/s. The CuO films were optical direct band gap calculated from optical transmittance measurements within the range of 1.422 to 2.395 eV, which are quite compatible with the solar absorber values. The results show that the compact design is better than the conventional SPD, also, that exhibit the obvious effect of deposition platform speed on the CuO properties. The advantages of (FCSPD) design are the advance performance of precise 3D motion, spraying, with specific location and high homogeneity in deposition layer.

Keywords: Fully computerized spray pyrolysis deposition, CuO, Deposition speed, structural properties, optical properties

Article published in International Journal of Current Engineering and Technology, Vol.7, No.1 (Feb-2017)