Characteristics of SnO 2 :F Thin Films Deposited by Ultrasonic Spray Pyrolysis: Effect of Water Content in Solution and Substrate Temperature
Mario A. Sánchez-García,Arturo Maldonado,Luis Castañeda,Rutilo Silva-González,María de la Luz Olvera +4 more
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In this paper, the physical characteristics of the films as a function of both water content in the starting solution and substrate temperature were studied, showing that the film structure was polycrystalline in all cases, and that the intensity of (200) peak increased with the water content.Abstract:
Fluorine doped tin oxide, SnO2:F, thin films were deposited by ultrasonic chemical spray starting from tin chloride and hydrofluoric acid. The physical characteristics of the films as a function of both water content in the starting solution and substrate temperature were studied. The film structure was polycrystalline in all cases, showing that the intensity of (200) peak increased with the water content in the starting solution. The electrical resistivity decreased with the water content, reaching a minimum value, in the order of 8 × 10-4 Ωcm, for films deposited at 450℃ from a starting solution with a water content of 10 ml per 100 ml of solution; further increase in water content increased the corresponding resistivity. Optical transmittances of SnO2:F films were high, in the order of 75%, and the band gap values oscillated around 3.9 eV. SEM analysis showed uniform surface morphologies with different geometries depending on the deposition conditions. Composition analysis showed a stoichiometric compound with a [Sn/O] ratio around 1:2 in all samples. The presence of F into the SnO2 lattice was detected, within 2 at % respect to Sn.read more
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Effect of fluorine doping on the structural, optical and electrical properties of SnO2 thin films prepared by spray ultrasonic
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Influence of Surface Passivation on optical properties of spray pyrolysis deposited Pd-SnO2
Patrick Mwinzi Mwathe,Robinson Musembi,Mathew Munji,Benjamin Odari,Lawrence Munguti,Alex Alfred Ntilakigwa,John Nguu,Bernard O. Aduda,Boniface Muthoka +8 more
TL;DR: In this article, the effect of varying the fluorine content on the optical properties of Pd-F:SnO2 thin films were studied and the calculated optical band gap of the as prepared thin films has been found to range from 3.8eV to 4.11eV.
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