近紫外激发Sm^(3+)与Sr^(2+),Ba^(2+),Bi^(3+)共掺杂的La_(1/3)NbO^3的发光性质  

Photoluminescence Properties of La_(1/3)NbO_3∶ Sm^(3+) Codoped with Sr^(2+),Ba^(2+) and Bi^(3+) Under Near-UV Excitation

作　　者：杜燕燕[1] 黄科科[1] 张佳旗[1] 王楚楚[2] 初学峰[1] 侯长民[1] 冯守华[1] 

机构地区：[1]吉林大学无机合成与制备化学国家重点实验室,长春130012 [2]吉林大学生命科学学院,长春130012

出　　处：《高等学校化学学报》2013年第3期509-513,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:90922034;21131002);高等学校博士学科点专项科研基金(批准号:20110061130005)资助

摘　　要：通过高温固相反应合成了La1/3NbO3∶Sm3+荧光粉.样品的荧光光谱表明,La1/3NbO3∶Sm3+荧光粉最强的激发带在406 nm,对应于Sm3+的6H5/2→4K11/2跃迁,属于近紫外区(365～410 nm).当激发波长为406nm时,样品的最强发射峰位于596 nm,是由Sm3+的4G5/2→6H7/2跃迁而产生的.因此,La1/3NbO3∶Sm3+可以作为基于近紫外激发的白光发光二极管(LED)的红光材料.而且,La位共掺杂Sr2+,Ba2+和Bi3+使样品的荧光强度大大增加,在最佳掺杂浓度时的量子产率分别为5.4%,7.5%和5.3%.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 3NbO3 

分 类 号：O611[理学—无机化学]