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Effect of precursor solutions on the structural and optical properties of sprayed NiO thin films
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering. National Research Centre, Egypt.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
National Research Centre, Egypt.
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2017 (English)In: Materials Science in Semiconductor Processing, ISSN 1369-8001, E-ISSN 1873-4081, Vol. 64, 32-38 p.Article in journal (Refereed) Published
Abstract [en]

Nickel oxide thin films were deposited by a simple and low-cost spray pyrolysis technique using three different precursors: nickel nitrate, nickel chloride, and nickel acetate on corning glass substrates. X-ray diffraction show that the NiO films are polycrystalline and have a cubic crystal structure, although predominantly with a preferred 111-orientation in the growth direction and a random in-plane orientation. The deconvolution of the Ni 2p and O 1s core level X-ray photoelectron-spectra of nickel oxides produced by using different precursors indicates a shift of the binding energies. The sprayed NiO deposited from nickel nitrate has an optical transmittance in the range of 60-65% in the visible region. The optical band gap energies of the sprayed NiO films deposited from nickel nitrate, nickel chloride and nickel acetate are 3.5, 3.2 and 3.43 eV respectively. Also, the extinction coefficient and refractive index of NiO films have been calculated from transmittance and reflectance measurements. The average value of refractive index for sprayed films by nickel nitrate, nickel chloride and nickel acetate are 2.1, 1.6 and 1.85 respectively. It is revealed that the band gap and refractive index of NiO films by using nickel nitrate corresponds to the commonly reported values. We attribute the observed behavior in the optical band gap and optical constants as due to the change of the Ni/O ratio.

Place, publisher, year, edition, pages
2017. Vol. 64, 32-38 p.
Keyword [en]
Nickel oxide; Spray pyrolysis; Pole figure; Optical properties
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-137995DOI: 10.1016/j.mssp.2017.03.009ISI: 000401092800007OAI: oai:DiVA.org:liu-137995DiVA: diva2:1105152
Note

Funding Agencies|Swedish Research Council [VR 348-2013-6782]; Egyptian Ministry for Higher Education and Scientific Research; Angpanneforeningens Forskningsstiftelse [14-517]; Swedish Research Council (VR) Marie Sklodowska Curie International Career "GREEN 2D FOX" [2015-00679]

Available from: 2017-06-02 Created: 2017-06-02 Last updated: 2017-06-20

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The full text will be freely available from 2019-03-16 17:22
Available from 2019-03-16 17:22

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Ahmad, Mohammed Metwally GomaaYazdi, GholamrezaSchmidt, SusannKhranovskyy, VolodymyrEriksson, FredrikYakimova, Rositsa
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