Lu_(2)O_(3):Dy和Lu_(2)O_(2)S:Dy荧光粉体的合成与发光特性  

Synthesis and Photoluminescence Properties of Lu_(2)O_(3):Dy and Lu_(2)O_(2)S:Dy Phosphors

作　　者：许鑫鑫 陈红兵[1,2] 任桂平 吕滨 Xu Xinxin;Chen Hongbing;Ren Guiping;Lü Bin(School of Materials Science and Chemical Engineering,Ningbo University,Ningbo 315211,China;Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province,Ningbo 315211,Chirm;Faculty of Maritime and Transportation,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学材料科学与化学工程学院,浙江宁波315211 [2]浙江省光电探测材料及器件重点实验室,浙江宁波315211 [3]宁波大学海运学院,浙江宁波315211

出　　处：《中国稀土学报》2021年第5期734-741,共8页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金(51702171);浙江省钱江人才计划(QJD1702017);宁波市自然科学基金(2019A610052)资助。

摘　　要：以NH4HCO3为沉淀剂,采用简易的化学共沉淀法合成了非晶态前驱沉淀物,前驱体在空气中煅烧获得了立方Lu_(2)O_(3):Dy氧化物荧光粉,再在还原性气氛下对该氧化物进行硫化处理获得了六方Lu_(2)O_(2)S:Dy硫氧化物荧光粉。Lu_(2)O_(3):Dy和Lu_(2)O_(2)S:Dy荧光粉分别为纳米级类球状和无规则二维板片状。光谱分析结果表明,Lu_(2)O_(3):Dy荧光粉呈黄绿光的发射,这源自Dy^(3+)离子4f^(9)电子组态内^(4)F_(9/2)→^(6)H_(15/2),^(6)H_(13/2)的电子跃迁,其CIE颜色坐标为(0.34,0.46);Lu_(2)O_(2)S:Dy荧光粉则呈现出强烈的蓝、绿、黄及红光发射,分别来源于Dy^(3+)离子的^(4)F_(9/2)→^(6)H_(15/2),^(6)H_(13/2),^(6)H_(11/2)及^(4)G_(11/2)→^(6)H^(13/2)电子跃迁,其1931CIE颜色坐标为(0.40,0.43)。在Lu_(2)O_(3)和Lu_(2)O_(2)S晶格中Dy^(3+)离子的最佳掺杂浓度分别为0.05%和1.0%(原子分数),这两个体系的荧光猝灭均是由于Dy^(3+)→Dy^(3+)之间能量互递作用导致的。相比于Lu_(2)O_(3):Dy氧化物荧光粉,Lu_(2)O_(2)S:Dy硫氧化物荧光粉有更高的发射及激发强度、更大的外量子效率和更短的荧光寿命。An amorphous precipitation precursor was synthesized by a facile co-precipitation method using ammonium hydrogen carbonate as the precipitant and then thermally decomposed into a cubic Lu_(2)O_(3):Dy phosphor powder with sphere-like morphology in air.Further sulfuration under hydrogen atmosphere resulted in a hexagonal Lu_(2)O_(2)S:Dy phosphor powder with plate-like shape.The Lu_(2)O_(3):Dy phosphor exhibits yellowish green emissions derived from ^(4)F_(9/2)→^(6)H_(15/2),^(6)H_(13/2) transitions of Dy^(3+) and the 1931CIE chromaticity coordinate is(0.34,0.46),while the Lu_(2)O_(2) S:Dy phosphor shows strong blue,green and yellow emissions,respectively,originated from ^(4)F_(9/2)→^(6)H_(15/2),^(6)H_(13/2),^(6)H_(11/2),and ^(4)G_(11/2)→^(6)H_(13/2) transitions and the 1931 CIE chromaticity coordinate is(0.40,0.43).The optimum contents of Dy^(3+) in Lu_(2)O_(3) and Lu_(2)O_(2)S are 0.05% and 1.0%,respectively.The Lu_(2)O_(2)S:Dy phosphor has a much higher emission and excitation intensity,a bigger external quantum efficiency,and a shorter lifetime than the Lu_(2)O_(3):Dy counterpart.

关 键 词：荧光粉 Dy^(3+)掺杂 Lu_(2)O_(3) Lu_(2)O_(2)S 光致发光 

分 类 号：O482.31[理学—固体物理]