白光LED用高亮度橙色高温相Ca_3SiO_4Cl_2:Eu^(2+)荧光粉  

An Intense Orange High-temperature Phase Ca_3SiO_4Cl_2:Eu^(2+) Phosphor for White LEDs

作　　者：丁唯嘉[1,2] 林委青[1] 张梅[3] 王静[2] 苏锵[2] 

机构地区：[1]华南农业大学理学院生物材料研究所,广东广州510642 [2]中山大学化学与化学工程学院,广东广州510275 [3]五邑大学功能材料研究所,广东江门529020

出　　处：《中山大学学报（自然科学版）》2011年第2期62-65,69,共5页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金面上资助项目(20501023);广东高校优秀青年创新人才培养计划(育苗工程)资助项目(LYM09031);华南农业大学211工程重点学科建设资助项目(2009B010100001);华南农业大学校长科学基金资助项目(2007K031)

摘　　要：采用高温固相法合成了高亮度橙色高温相Ca2.99Eu0.01SiO4Cl2荧光粉,进行了发光特性表征并探索了其在LED上的应用。Eu2+离子在Ca3SiO4Cl2基质中可被300～450 nm光有效激发发出橙黄光,发射光谱是Eu2+离子的特征4f65d1→4f7跃迁发射带。测量得到的Eu2+离子的荧光寿命为微秒量级,分别是τ1=1.53μs和τ2=7.29μs。用该荧光粉制备了395nm近紫外芯片基和460 nm蓝光芯片基发光二极管,并测试了它们的发光性能,表明高温相Ca2.99Eu0.01SiO4Cl2荧光粉适合于用作白光LED的红黄色组分。An intense orange high-temperature phase Ca3SiO4Cl2：Eu2＋ phosphor was synthesized by high-temperature solid-state reactions and investigated by photoluminescence excitation,emission spectroscopies and lifetime.The excitation and emission spectra showed that the phosphor could be efficiently excited by the incident light of 300~450 nm,well matched with the emission band of 395 nm-emitting InGaN chip,and emitted an intense orange light.The fluorescence lifetimes values of Eu2＋ ion were determined to be 1.53 μs and 7.29 μs,respectively.By combining the phosphor with a 395 nm-emitting InGaN chip,an intense orange LED was fabricated.Under 20 mA forward-bias current,its CIE chromaticity coordinates were（0.533,0.446）.The result showed that high-temperature phase Ca3SiO4Cl2：Eu2＋ was a promising orange phosphor for n-UV InGaN-based white LED.

关 键 词：白光LED 碱土卤硅酸盐 稀土 

分 类 号：O482.31[理学—固体物理]