Dy^(3+)掺杂的硅酸盐荧光粉发光光谱的研究  

Investigation on Luminescence Spectra of M_2SiO_4:Dy^(3+)(M=Ca,Sr,Ba) Phosphor

作　　者：周鑫荣[1] 何大伟[1] 王永生[1] 

机构地区：[1]北京交通大学光电子技术研究所发光与光信息技术教育部重点实验室,北京100044

出　　处：《人工晶体学报》2009年第S1期28-31,共4页Journal of Synthetic Crystals

基　　金：国家自然科学基金(No.60877025);北京市科学技术委员会(Z08000303220803);国家杰出青年科学基金(No.60825407);北京市自然科学基金(No.2092024)

摘　　要：本文研究了M2SiO4∶Dy3+(M=Ca,Sr,Ba)样品的结构和发光特性。结果表明:Ca2SiO4属单斜晶系,Sr2SiO4和Ba2SiO4属正交晶系,且晶体结构随着Dy3+的掺入并不发生改变。M2SiO4∶Dy3+在325 nm、350 nm、365 nm和386nm附近有比较强烈的吸收峰,分别对应Dy3+的6H15/2→6P3/2,6H15/2→6P7/2,6H15/2→6P5/2,6H15/2→4M21/2的跃迁。在386 nm光激发下,样品在480 nm、492 nm及574 nm处有较强的发射峰。改变样品中碱土金属阳离子的种类和含量,M2SiO4∶Dy3+黄光发射带和蓝光发射带的相对强度发生了较大的变化。The structure and emission spectrum of M2SiO4∶Dy3+(M=Ca,Sr,Ba) were investigated.The results indicated that Ca2SiO4 is monoclinic and Sr2SiO4、Ba2SiO4 are orthorhombic.The crystal structure does not change after Dy3+ are doped into the crystal lattice.The excitation spectra of M2SiO4∶Dy3+ show strong absorption near 325 nm、350 nm、365 nm and 386 nm due to 6H15/2 → 6P3/2,6H15/2 → 6P7/2,6H15/2 → 6P5/2,6H15/2 → 4M21/2 transition of Dy3+.The emission spectra of samples have revealed three intense emissions(480 nm,492 nm and 574 nm) under 386 nm excitation.By changing the sort and content of the alkaline-earth metal cation in the sample,the intensity ratio of the yellow band to the blue band has changed greatly.

关 键 词：荧光粉 Dy3+掺杂 发光特性 发射光谱 

分 类 号：O482.31[理学—固体物理]