Optical and Electrophysical Properties of 95% In2O3 + 5% SnO2/ns-Si Heterostructure
Keywords:current-voltage characteristics, absorption spectrum, thin films, transparent oxides
Optical and electrical properties of 95% In2O3 + 5% SnO2/ns-Si heterostructures with films 6 and 12 nm in thickness deposited on a nanostructured silicon surface by the magnetron sputtering have been considered. It is shown that the 6-nm film is characterized by several peaks in the optical absorption spectrum, while the 12-nm film has no absorption peaks in the same spectral interval. The influence of the environment and the optical irradiation on the electrical properties of 95% In2O3 + 5% SnO2/ns-Si structures is determined. Their response to the gas environment is shown to be governed by the dielectric permittivity of an adsorbate. The results obtained can be used in the development of resistive gas sensors based on 95% In2O3 + 5% SnO2/ns-Si films.
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