Ca_(10)(Si_2O_7)_3Cl_2∶Eu^(3+)荧光粉的发光特性研究  

Luminescence properties of Ca_(10)(Si_2O_7)_3Cl_2∶Eu^(3+) phosphor

作　　者：宁青菊[1] 王邦卿[1] 王秀峰[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,陕西西安710021

出　　处：《电子元件与材料》2012年第2期55-58,共4页Electronic Components And Materials

基　　金：国家自然科学基金资助项目(No.50372038);陕西省教育厅专项科研计划资助项目(No.11JK0837);陕西科技大学研究生创新基金资助项目

摘　　要：采用溶胶-凝胶法合成了Ca10(Si2O7)3Cl2∶Eu3+荧光粉,并研究了该荧光粉的微观结构及发光性能。结果显示:Eu3+掺杂Ca10(Si2O7)3Cl2荧光粉属于单斜晶系,颗粒呈现近球体和长方体形状,粒径介于400～500 nm。在395 nm近紫外光激发下,该荧光粉呈红色发射,并有5个分别位于582,594,615,654和705 nm的主发射峰,分别对应于Eu3+的5D0→7F0、7F1、7F2、7F3和7F4特征跃迁。该荧光粉的激发光谱覆盖了320～480 nm这段波长范围,主激发峰位于395 nm。另外,该荧光粉的发光强度随Eu3+掺杂量的提高而增强。Ca10（Si2O7）3Cl2 ： Eu3＋ phosphor was synthesized by sol-gel method, and the microstructure and luminescence properties of the prepared phosphor were investigated. The results show that： the prepared Eu3＋ doped Ca10（Si2O7）3C12 phosphor has a monoclinic structure. The particles of the phosphor are spherical or cuboidal in shape and have a size of 400-500 nm. Under near-UV （395 nm） excitation, the phosphor shows red emission with five major emission peaks respectively at 582, 594, 615,654 and 705 nm, as a result of the radioactive transitions of Eu3＋ from the 5D0 state to 7Fj （J=4, 3, 2, 1, 0, respectively） state. The excitation band of the phosphor covers the range of 320 nm to 480 nm, with the main excitation peak at about 395 nm. The luminescence intensity of the phosphor increases with increasing Eu3＋ content.

关 键 词：白光LED Ca10(Si2O7)3Cl2:Eu3+掺杂 光致发光 

分 类 号：TM923[电气工程—电力电子与电力传动]