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Synthesis and Characterization of Nickel oxide thin films by spray Pyrolysis method: Effect of Nickel source nature
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Nickel oxide (NiO) material had been reported as one interesting candidate for transparent conductive oxides (TCO) applications, given their specific properties. In this work, we have synthesized un-doped nickel oxide (NiO) thin films by using the spray pyrolysis method deposited on heated glass substrates at 500°C. The effect of the Nickel source on the optical and electrical properties of the prepared films had been reported. We have used two sources of nickel: nickel nitrate (Ni (NO3)2.6H2O) and nickel Chloride (NiCl2.6H2O). The characterization techniques such as UV–visible spectroscopy and the two-point probe technique were used to investigate the prepared NiO thin films. The optical analyses show that all the samples exhibit averaged optical transparency between 52% and 61% in the visible region. The evalueted optical gap- the energy of the NiO thin films between 3.59 and 3.84eV with the change of nickel source. Refractive index and extinction coefficient values were decreased with a variation of nickel source. From Electrical measurement, it was observed that the minimum resistivity of the NiO films are 0.106 Ω from films prepared with nickel nitrate source
Keywords
TCO, Thin film, NiO, Spray pyrolysis, Glass substrates.
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