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- W2948164562 abstract "In this work 1% Fe-doped tungsten trioxide WO 3 thin films have been prepared on glass substrates heated to a fixed temperature of 350 °C, using the spray pyrolysis technique, from an aqueous solution based on ammonium tungstate (NH 4 ) 10 .H 2 (W 2 O 7 ) 6 with 0.005M concentration. The films were annealed at 400 °C, 450 °C, 500 °C and 550 °C for 4 hours. We used X-ray diffraction (XRD), thickness measurement by stylus profilometer for structural characterizations and UV-Visible spectra in the wavelength range [190nm to 1100nm] for optical characterizations. The structural characterization of the WO 3 thin films by XRD shows that they crystallize in a monoclinic structure, with a space group P2/n. The lattice parameters of samples annealed at 400 °C for 4hours were: a=7.4017A, b=7.5703A, c=7.7323A, β=91.44 °. The average grain size is of the order of 62 nm and the thickness varies between 271 and 351 nm. The UV-Visible transmission spectra confirm that it is possible to obtain good transparent WO 3 thin films, with a 72% and 81% of transmittance in the visible. From the transmittance spectra, we determined the indirect transition band gap value of 3.68 eV at 450 °C for 4 hours. Key words: WO 3 Thin films, Spray Pyrolysis, XRD, Spectrophotometry." @default.
- W2948164562 created "2019-06-14" @default.
- W2948164562 creator A5033320744 @default.
- W2948164562 date "2018-07-24" @default.
- W2948164562 modified "2023-09-23" @default.
- W2948164562 title "Annealing effect on the structural and optical properties of Fe-doped WO3 thin films" @default.
- W2948164562 hasPublicationYear "2018" @default.
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