Ce^(3+)和Mn^(2+)掺杂的Ba_9(Y_(2-x)Sc_x)(SiO_4)_6光谱特性和温度特性研究  

Luminescence and Thermal Properties of Ce^(3+),Mn^(2+) Codoped Ba_9(Y_(2-x)Sc_x)(SiO_4)_6 Phosphors

作　　者：刘箐哲[1] 刘永福[2] 张德恺[1,3] 张家骅[2] 胡晓云[1,3] 于金影[1] 

机构地区：[1]西北大学物理学系,陕西西安710069 [2]发光学及应用国家重点实验室中国科学院长春光学精密机械与物理研究所,吉林长春130033 [3]西北大学国家级光电技术与功能材料国际合作基地,陕西西安710069

出　　处：《发光学报》2013年第11期1440-1445,共6页Chinese Journal of Luminescence

基　　金：陕西省自然科学基础研究基金(2012JM1020);陕西省教育厅自然科学研究(12JK0977)资助项目

摘　　要：采用高温固相法制备了Ba9(Y2-x Sc x)(SiO4)6∶Ce3+,Mn2+(x=0,0.5,1.0,1.5,2.0)样品。在该体系中,当Sc3+含量从x=0逐渐增加至x=2时,Ce3+的蓝光发射强度提高了1.7倍;同时,Mn2+的红光发射强度提高了1.9倍,显示了优良的红光特性。样品的发射光谱和漫反射光谱表明,Ce3+、Mn2+发射强度的增加与Ce3+吸收能力和Ce3+向Mn2+能量传递的提升有直接关系。研究了样品Ba9Sc2(SiO4)6∶Ce3+,Mn2+的热稳定性。随着温度的升高,Mn2+的红光发射呈现先升后降的态势。当温度从室温升至488 K时,Mn2+发射强度仅下降至室温时的84%,表现出优良的热稳定性。高亮的红光发射和优良的热稳定性表明该荧光材料可为紫外基白光LED提供良好的红色光源。Ba9( Y2-x Sc x)( SiO4)6∶ Ce3 +,Mn2 +( x =0,0. 5,1. 0,1. 5,2. 0) samples are prepared by solid-state reaction. For this phosphor,with the gradually increased Sc3 +contents from x = 0 to x =2,the blue emission intensity of Ce3 +for x = 2 sample increases to 1. 7 times and the red emission intensity of Mn2 +increases to 1. 9 times. By monitoring the photoluminescence and diffuse reflection spectra,it reveals that the increases of the Ce3 +and Mn2 +emissions are directly related with the enhancement of the absorbance of Ce3 +and the energy transfer efficiency from Ce3 +to Mn2 +. The x = 2 sample,Ba9Sc2( SiO4)6∶ Ce3 +,Mn2 +,was chosen for further thermal properties investigation.With temperature increasing,the red emission of Mn2 +increases originally and then decreases. As the temperature reaches to 488 K,the intensity is as high as 84% of that at room temperature. The enhanced red luminescence and superior temperature stability indicate BSS ∶ Ce3 +,Mn2 +could be used for UV-based white LEDs as the red light source.

关 键 词：Ba9(Y2-xScx)(SiO4)6∶Ce3+ Mn2+荧光粉 光谱特性 热稳定性 白光LED 

分 类 号：O482.31[理学—固体物理]