On the optical properties of Ag+15 ion beam irradiated TiO2 and SnO2 thin films

Details On the optical properties of Ag+15 ion beam irradiated TiO2 and SnO2 thin films On the optical properties of Ag+15 ion beam irradiated TiO2 and SnO2 thin films

2011-12-11

arxiv.org/abs/1112.2320v1

Physics

Condensed Matter

Materials Science

Scientific paper

In this study, the effects of 200 MeV Ag+15 ion irradiation on the optical properties of TiO2 and SnO2 thin films prepared by RF magnetron sputtering technique were investigated. These films were characterized by the UV-vis spectroscopy and it was observed that with increase in irradiation fluence the transmittance for the TiO2 films systematically increases while that for SnO2 decreases. Absorption spectra of the irradiated samples showed a minor changes in indirect bandgap from 3.44 to 3.59 eV for TiO2 while that for SnO2 significant modifications in the direct bandgap from 3.92 to 3.6 eV were observed on increasing irradiation fluence. The observed modifications in the optical properties of both TiO2 and SnO2 systems with irradiation can be attributed to controlled structural disorder/defects in the system.

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