Abstract
Highly textured fluorine-doped tin oxide thin films have been deposited using cost-effective spray pyrolysis technique. Precursor solution for spraying is prepared with solvents viz. methanol, ethanol, propane-2-ol and distilled water. The optical, structural, morphological and electrical properties of thin films have been studied. X-ray diffraction studies revealed polycrystalline tin-oxide (SnO 2) phase with tetragonal crystal structure and predominantly (2 0 0) oriented films, irrespective of solvents. The novel mat-like morphology is observed by scanning electron microscope (SEM). Hall-effect measurements revealed that the films are heavily doped degenerate semiconductor with n-type conductivity. The variations in electrical resistivity, carrier concentration and mobility with respect to spray solvents have been discussed. The typical P FTO sample has maximum value of figure of merit ( φ=6.18×10 −2 Ω −1) with lowest ever-reported sheet resistance of 3.71 Ω.
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