Abstract
Abstract We report the structural and photoluminescence characteristics of a high energy Ar + -irradiated SrTiO 3 single crystal. High resolution X-ray reciprocal space mapping, cross-section scanning electron microscopy and photoluminescence measurements suggest that thick amorphous and oxygen-deficient SrTiO 3 layers are formed after irradiation. Due to the highly accelerated Ar + (∼100 keV), electrical conductivity of the oxygen-deficient SrTiO 3 layer seems to be highly reduced, which results in the absence of 440 nm (blue-light) emission at 300 K, and broad and weak 380 nm emission at 20 K.
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