Abstract
In this paper, undoped and Pb-doped ZnO thin films have been prepared by sol gel method and deposited on glass substrate using dip-coating technique. The structural, morphological, and optical properties of the films were investigated as a function of Pb doping. The results of the structural tests showed that these films are of a polycrystalline hexagonal structure with a preferred orientation in the (002) direction. The grain size values of Pb-doped films were lower than that of pure ZnO, but the strain and the dislocation density values inecrease with increase Pb doping ratio. The atomic force microscopy (AFM) images showed that the particle size and Root Mean Square (RMS) of ZnO decrease with increasing Pb doping. The optical band gap values were found to increase from (3.19 to 3.30 eV) and the Urbach energy decrease from (322 to 313 meV). PL spectra exhibit an increased amount of defects with increasing Pb, which leads to a red shift in the UV region.
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A.R. Khantoul, M. Sebais, B. Rahal, B. Boudine, O. Halimi, Structural and optical properties of ZnO and Co doped ZnO thin films preparedby Sol-Gel. Acta Phys. Pol. A 133, 114–117 (2018)
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Boumaiza, A., Boudine, B. & Sebais, M. Fabrication and Characterization of Pure and Pb-doped ZnO Thin Films Prepared by Sol–Gel and Dip-coeting Method. J Inorg Organomet Polym 31, 3350–3355 (2021). https://doi.org/10.1007/s10904-021-01990-7
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DOI: https://doi.org/10.1007/s10904-021-01990-7