高等学校化学学报2013，Vol.34Issue(3)：509-513,5.DOI:10.7503/cjcu20120844
近紫外激发Sm3+与Sr2+,Ba2+,Bi3+共掺杂的La1/3NbO3的发光性质
Photoluminescence Properties of La1/3NbO3 : Sm3+ Codoped with Sr2+, Ba2+ and Bi3+ Under Near-UV Excitation
摘要
Abstract
La1/3NbO3: Sm3+ phosphor was synthesized by solid state reaction at high temperature and its photoluminescence properties were investigated. Its strongest excitation band is at 406 nm, ascribed to 6H5/2→ 4K11/2 transition of Sm3+ in the range of near-ultraviolet region (NUV, 365-410 nm). And its strongest emission peak is at 596 nm, attributed to 4G5/2→ 6H7/2 transition of Sm3+. As a result, La1/3NbO3: Sm3+ phosphor shows great potential for future application as alternative red-emitting NUV-based white LEDs. The luminescence intensity can be strongly enhanced by codoping cation in the La-site, namely Sr2+, Ba2+and Bi3+. And the quantum yield is 5. 4% , 7. 5% and 5. 3% for Sr2+, Ba2+ and Bi3+ codoped samples respectively with the optimum doping concentration.关键词
荧光光谱/白光发光二极管(LED)/固态照明/电荷补偿剂/La1/3NbO3Key words
Photoluminescence spectrum/ White light emitting diode ( LED ) / Solid-state lighting/ Charge compensation agent/ La1/3NbO3分类
化学化工引用本文复制引用
杜燕燕,黄科科,张佳旗,王楚楚,初学峰,侯长民,冯守华..近紫外激发Sm3+与Sr2+,Ba2+,Bi3+共掺杂的La1/3NbO3的发光性质[J].高等学校化学学报,2013,34(3):509-513,5.基金项目
国家自然科学基金(批准号:90922034,21131002)和高等学校博士学科点专项科研基金(批准号:20110061130005)资助. （批准号:90922034,21131002）
