Blue luminescence from electron-doped SrTiO3
Daisuke KanKyoto University Institute for Chemical Research, , Uji, Kyoto 611-0011, JapanRyoko KandaKyoto University Institute for Chemical Research, , Uji, Kyoto 611-0011, JapanYoshihiko KanemitsuKyoto University Institute for Chemical Research, , Uji, Kyoto 611-0011, JapanYuichi ShimakawaKyoto University Institute for Chemical Research, , Uji, Kyoto 611-0011, JapanM. TakanoKyoto University Institute for Chemical Research, , Uji, Kyoto 611-0011, JapanTaichi TerashimaKyoto University Research Center for Low Temperature and Materials Sciences, , Uji, Kyoto 611-0011, JapanAtsushi IshizumiNara Institute of Science and Technology Graduate School of Materials Science, , Ikoma, Nara 630-0912, Japan
2006en
ABI
Аннотация
Blue-light emissions from electron-doped SrTiO3 single crystals at room temperature were observed. Substituting La3+ for Sr2+ and Nb5+ for Ti4+ in SrTiO3 provides electron carriers in Ti 3d conduction bands; these carriers are responsible for the room-temperature blue-light emission. This blue-light emission is essentially the same as that observed in Ar+-irradiated oxygen-deficient SrTiO3. This blue luminescence is independent of the defect type. The chemical substitution of La3+ for Sr2+ changes the temperature of the structural phase transition from cubic to tetragonal symmetry. The relation between the photoluminescence properties and the structural phase transition is also discussed.
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