Optical properties of SnO₂ thin-films under an operating condition of gas sensors

Abstract

Optical properties of SnO₂ films were investigated under an operating condition of gas sensors. The films were prepared by a liquid phase deposition method. The films were highly transparent over the visible range. When the films were treated in 0.5 %H₂/N₂, the absorption was enhanced at shorter-wavelength-region from 350 to 500 nm. Such absorption was considered to relate to the defect formation which concerned to the response to the gas.