白光LED用荧光粉Ba_(1.97)Ca_(1-x)(B_3O_6)_2∶Eu_(0.03)^(2+),Mn_x^(2+)的制备及其发光特性  

Preparation and Luminescence Characteristics of Ba_(1.97)Ca_(1-x)(B_3O_6)_2∶Eu_(0.03)^(2+),Mn_x^(2+) Phosphor for White LED

作　　者：宋恩海[1] 赵韦人[1] 周国雄[1] 豆喜华[1] 俞军[1] 易春雨 

机构地区：[1]广东工业大学物理与光电工程学院,广东广州510006 [2]惠州市纯英半导体照明科技有限公司,广东惠州516006

出　　处：《光谱学与光谱分析》2010年第12期3191-3194,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学青年基金项目(50001010);广东省创新基金项目(09C26214405227);惠州市产学研结合项目(2009B010004008)资助

摘　　要：采用高温固相反应法制备了Ba1.97Ca1-x(B3O6)2∶Eu2+,Mnx2+(x=0,0.03,0.06,0.15)荧光粉,研究了其相组成与荧光特性。结果表明,样品具有单相Ba2Ca(B3O6)2晶体结构。Eu2+同时占据Ba2+格位和Ca2+格位。在317 nm波长的紫外光激发下,Eu2+辐射出峰值在450 nm附近的宽谱蓝光。通过能量传递作用,Mn2+辐射峰值为600 nm左右的宽谱红光。蓝光和红光叠加形成色坐标为(x=0.371,y=0.282)的近白光发射。样品的激发光谱分布在250~400 nm的波长范围,有望在紫外激发的白光LED中获得应用。The Ba1.97Ca1-x（B3O6）2∶Eu2＋,Mnx2＋（x=0,0.03,0.06,0.15） phosphors were synthesized by high temperature solid-state reaction,and their phase composition and luminescence properties were studied.In these phosphors,Eu2＋ locates at the crystal sites of Ba2＋ and Ca2＋ ions.Under 317 nm UV light excitation,the 5d→4f transition of Eu2＋ forms a broad blue emission band with a peak at 450 nm.With the energy transfer from Eu2＋ions,Mn2＋ ions emit a broad red band with the peak at 600 nm.The mixture of the broad blue emission and a broad red emission forms an approximate white light with the CIE chromaticity（x=0.371, y=0.282）.The phosphors can be excited effectively by UV light in the range of 250-400 nm,so they are the potential candidates for single white lightemitting phosphor excited by UV-LED.

关 键 词：光致发光 白光 LED 荧光粉 

分 类 号：O433[机械工程—光学工程]