Structural and optical characterization of cobalt-doped zinc oxide thin films deposited by chemical spray pyrolysis

Abstract

In our experimental pure and cobalt (Co) doped Zinc oxide (ZnO) thin film were prepared onto glass substrate chemical spray pyrolysis technique at 400 oC, X-ray diffraction, Atomic force microscope and optical properties were all investigated for each prepared films. Nanocrystalline films with hexagonal structure and strong (100) and (002) preferred orientation were obtained. The maximum value of average grain size is (15.7) nm with 6% Co-doping concentration. The optical transmission spectra have shown that both pure and doped ZnO films were transparent in UV-Vis wavelength region. The energy band gap of 0% Co is about 3.28 eV and decrease to 3.2 eV after 4% doping. The excellent-estimated structure, the optical results are accomplished in doped ZnO film with (4 and 6) % Co.

Influence of Copper and Zinc Doping on Optical Properties of Nano Nickel Oxide Films Deposited by Sol-Gel Method

“…In the second region, which is greater than 360 nm, we notice that the membrane's permeability is high (up to 94%) throughout the visible region and extends into the near infrared region (that is, in the range of low energies Vis-NIR). This finding qualifies it for using as permeable layers in solar cells, which outperforms the results of a number of researchers who analyzed the NiO compound in the form of a film of nano and nonnano thickness generated using a method similar to the one used in our work, as well as other approaches [20,21]. After doping the nano-membrane with zinc with mass fraction of 1%, 3%, 5%, the transmittance values started decreasing to reach (91%) for 5% doping at wavelengths greater than 360 nm, i.e., in the low energies Vis-NIR range.…”