光致发光
发光
四方晶系
兴奋剂
材料科学
电子
蓝移
相变
相(物质)
分析化学(期刊)
化学
凝聚态物理
光电子学
结晶学
晶体结构
物理
有机化学
色谱法
量子力学
作者
Daisuke Kan,Ryoko Kanda,Yoshihiko Kanemitsu,Yuichi Shimakawa,Mikio Takano,Taichi Terashima,Atsushi Ishizumi
摘要
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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