Optical and Electronic Properties of SnO2 Thin Film Fabricated by Using SILAR method
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Tin oxide thin films were fabricated on glass substrates by the successive ionic layer adsorption and reaction (SILAR) method at room temperature and ambient pressure. Before measuring their properties, all samples were annealed at 500oC for 2 h in air. Film thickness increased with the number of cycles; X-ray diffraction patterns for the annealed SnO2 thin films indicated a SnO2 single phase. Thickness of the SnO2 films increased from 12 to 50 nm as the number of cycles increased from 20 to 60. Although the optical transmittance decreased with thickness, 50 nm SnO2 thin films exhibited a high value of more than 85%. Regarding electronic properties, sheet resistance of the films decreased as thickness increased; however, the measured resistivity of the thin film was nearly constant with thickness (3×10-4 ohm/cm). From Hall measurements, the 50 nm thickness SnO2 thin film had the highest mobility of the samples (8.6 cm2/(V·s)). In conclusion, optical and electronic properties of SnO2 thin films could be controlled by adjusting the number of SILAR cycles.
Abstract
Tin oxide thin films were fabricated on glass substrates by the successive ionic layer adsorption and reaction (SILAR) method at room temperature and ambient pressure. Before measuring their properties, all samples were annealed at 500oC for 2 h in air. Film thickness increased with the number of cycles; X-ray diffraction patterns for the annealed SnO2 thin films indicated a SnO2 single phase. Thickness of the SnO2 films increased from 12 to 50 nm as the number of cycles increased from 20 to 60. Although the optical transmittance decreased with thickness, 50 nm SnO2 thin films exhibited a high value of more than 85%. Regarding electronic properties, sheet resistance of the films decreased as thickness increased; however, the measured resistivity of the thin film was nearly constant with thickness (3×10-4 ohm/cm). From Hall measurements, the 50 nm thickness SnO2 thin film had the highest mobility of the samples (8.6 cm2/(V·s)). In conclusion, optical and electronic properties of SnO2 thin films could be controlled by adjusting the number of SILAR cycles.
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