(Lu_(0.5)In_(0.5))_(2)O_(3):Tm^(3+),Yb^(3+)超细粉末的合成和上转换发光  

Synthesis and Upconversion Luminescence of Ultrafine(Lu_(0.5)In_(0.5))_(2)O_(3):Tm^(3+),Yb^(3+)Powders

作　　者：冯凯 吕光哲[3] 吕滨[1,2] FENG Kai;Lü Guangzhe;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,China;School of Metallurgy Engineering,Liaoning Institute of Science and Technology,Benxi 117004,China)

机构地区：[1]宁波大学材料科学与化学工程学院,宁波315211 [2]浙江省光电探测材料及器件重点实验室,宁波315211 [3]辽宁科技学院冶金工程学院,本溪117004

出　　处：《材料研究学报》2021年第8期591-596,共6页Chinese Journal of Materials Research

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)。

摘　　要：先用液相沉淀技术合成Lu/In/Tm/Yb四元体系水合碱式碳酸盐类沉淀前驱体,然后将其在1100℃煅烧制备出一系列类球状平均粒度约为110 nm的[(Lu_(0.5)In_(0.5))_(0.999-x)Tm_(0.001)Yb_(x)]_(2)O_(3)(x=0~0.05)氧化物固溶体。在980 nm泵浦激光激励下这种氧化物粉体在可见光区发射出强烈的蓝青光(450~510 nm,源于Tm^(3+)离子4f^(12)电子组态内^(1)D_(2)→^(3)H_(6),^(3)F_(4)电子跃迁)和较弱的红光(650~670 nm,源于Tm^(3+)离子的^(1)G_(4)→^(3)F_(4)电子跃迁),二者的上转换过程均为双光子吸收。随着Yb^(3+)离子浓度的提高1931CIE色坐标上的发射光颜色逐渐由绿光(0.31,0.54)移向蓝光(0.01,0.19)。Yb^(3+)离子共掺提高了Tm^(3+)离子的上转换发光强度,其最佳含量为2.5%。发射474 nm蓝光和654 nm红光的粉体,其荧光寿命分别约为0.84和0.97 ms。The quaternary-system Lu/In/Tm/Yb carbonat-recursors were synthesized by chemical precipitation route,and then were calcinated at 1100℃ to acquire a series of sphere-like[(Lu_(0.5)In_(0.5))_(0.999-x)-Tm_(0.001)Yb_(x)]_(2)O_(3)(x=0~0.05)solid solution-oxides with average particle size of about 110 nm.Under 980 nm laser excitation the oxide powder exhibits strong bluish emission at about 450∼510 nm and weak red emission at about 650~670 nm arising from ^(1)D_(2)→^(3)H_(6),^(3)F_(4) and ^(1)G_(4)→^(3)F_(4) transitions of Tm^(3+),respectively.Their upconversion mechanisms may be ascribed to the above two-phonon processes.The color of the emitted light on the 1931CIE color coordinates gradually move from green(0.31,0.54)to blue(0.01,0.19)colors with the increasing Yb^(3+)concentration.Yb^(3+)co-doping effectively enhances the luminescence intensity of Tm^(3+)and its optimum content is 2.5%.The fluorescence lifetimes of the oxide powder were measured to be about 0.84 for the 474 nm blue emission and 0.97 ms for the 654 nm red emission.

关 键 词：无机非金属材料 上转换 液相法 倍半氧化物 荧光粉 能量传递 

分 类 号：O482.31[理学—固体物理]