Abstract
Al-doped tin oxide (SnO<sub>2</sub>) nanostructured thin films are prepared by homemade spray pyrolysis route on glass substrates prepared at 400 ⁰C, and annealed at 500 °C and 600 °C. Using a solution consisting of SnCl<sub>4</sub>.5H<sub>2</sub>O starting material and doping source was AlCl<sub>3</sub> with various Al doping ratio. Sn<sub>1-x</sub>Al<sub>x</sub>O<sub>2</sub> (x₌0.08 to 0.10) were dissolved in ethanol and stirred four hours at 50 °C. The effect of changes in doping content and annealing effect of Al:SnO<sub>2 </sub>nanostructured thin films was investigated. The result of X-ray diffraction have shown that the doped films are polycrystalline without any second phase with preferential orientations along the (110) and (200) planes and the grain size varied within range (3 nm-28 nm). The UV-Visible transmittance exceeds 85%, the optical band gap was estimated to be around 2.6 ev to 3.6 ev. The scanning electron microscopic (SEM) analysis showed the nanostructures consisting of small grains Nano flowers, Nano balls and Nano grains. EDAX to confirm the presence of dopant elements in the nanostructured thin films.<div><br></div>
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