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Sm2Ti2O7 and Sm2Ti1.8Ce0.2O7 samples have been synthesized using a modified Pechini method. The evolution of structure and morphology under highly reducing atmosphere was evidenced using X-ray diffraction (XRD), Raman spectroscopy and scanning electron microscopy. Ceria seems to facilitate the reduction of titania, leading to the formation of orthorombic SmTiO3.
The effect of annealing in air and in nitrogen atmosphere on the structure, luminescence emission and electrical properties of ZnO, Li:ZnO and Cu:ZnO doped thin films prepared by sol-gel method was investigated by scanning electron microscopy, X-ray diffraction, photoluminescence and resistivity measurements. The films annealed in nitrogen demonstrate smoother surfaces, improved crystallinity and...
The ZnO thin film was deposited on n-Si (100) by sol-gel and spin coating technique. Pd/ZnO/n-Si/Ti/A1 Schottky contact was fabricated by the thermal evaporation method using shadow mask technique. The ZnO thin film was annealed in Ar (argon) atmosphere at 450°C to enhance the structural and surface morphology. The structural and surface morphology of prepared ZnO thin film were characterized by the...
Fluorine-free sol-gel process is a potential technique in preparing YBa2Cu3O7-δ (YBCO) films due to avoiding the release of HF gas. In this paper, yttrium acetate, barium acetate, and copper acetate are used as the starting materials to synthesize a novel YBCO fluorine-free precursor solution. The phase evolution during the heat-treatment process of YBCO films and YBCO phase formation were studied,...
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