Effect of La Doping on ZnO Thin Films by Spray Pyrolysis

Abstract:

In this study, Zinc oxide (ZnO) undoped and Lanthanum doped (ZnO: La) thin films were deposited on 400°C heated glass using spray pyrolysis technique with moving nozzle. The components (Zn (CH₃COO)2, 2H₂O) and (LaCl₃, 7H₂O) were used as sources to produce ZnO thin film and doped Lanthanum, respectively. Effects of dopant on the optical and structural properties of undoped and 0, 2 and 4 wt. % Lanthanum doped ZnO thin films were studied. Optical transmittance spectra of the films showed high transparency of about 98% in visible region. The optical gap for ZnO and 0, 2 and 4 wt. % La doped ZnO thin films were found to be in 3.25-3.28 [eV] range. The X-ray diffraction showed that the thin films have hexagonal wurtzite structure with a strong (002) as preferred orientation, whereas the crystalline size was ranged in 15.89-33.45 nm. The ZnO thin films are promising to be used a light emitting diodes, gas sensor and UV detectors applications.

• Periodical: Defect and Diffusion Forum (Volume 397)
• Pages: 206-212
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.397.206
• Online since: September 2019
• Authors: Allag Nassiba*, Boubaker Benhaoua, Saied Chahnez, Barani Djamel, Segueni Leila, Brahim Gasmi, Achour Rahal, Atmane Benhaoua, Abdelkader Hima
• Keywords: Oxide, Pyrolysis, Spray, Thin Films, UV-Visible, X-Ray Diffraction (XRD), Zinc

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