Mn^(2+)掺杂Gd_(2)O_(3)∶Yb^(3+),Er^(3+)花状微晶的制备及上转换发光性能  

Preparation and Up-Conversion Luminescent Properties of Mn^(2+)Doped Gd_(2)O_(3)∶Yb^(3+),Er^(3+)Flower-Like Microcrystals

作　　者：王超 陈杰 尹玉 刘蓉 王珊珊 刘治刚 WANG Chao;CHEN Jie;YIN Yu;LIU Rong;WANG Shanshan;LIU Zhigang(School of Chemistry and Pharmaceutical Engineering,Jilin Institute of Chemical Technology,Jilin 132022,China;Center of Characterization and Analysis,Jilin Institute of Chemical Technology,Jilin 132022,China)

机构地区：[1]吉林化工学院化学与制药工程学院,吉林132022 [2]吉林化工学院分析测试中心,吉林132022

出　　处：《人工晶体学报》2023年第4期604-612,共9页Journal of Synthetic Crystals

基　　金：吉林省科技发展计划(YDZJ202101ZYTS029)。

摘　　要：为了获得具有明亮红光发射的上转换发光材料,采用简单的化学沉淀法制备了一系列Yb^(3+)、Er^(3+)、Mn^(2+)掺杂的Gd_(2)O_(3)微晶,并对其形貌、结构和发光性能进行了表征。结果表明,Gd_(2)O_(3)∶10%Yb^(3+),1%Er^(3+)微晶呈花状,平均粒径为2.28μm,经高温煅烧后呈现结晶性良好的立方相Gd_(2)O_(3)结构,且少量Mn^(2+)掺杂并不会影响微晶的形貌和晶相。在980 nm近红外光激发下,Gd_(2)O_(3)∶10%Yb^(3+),1%Er^(3+)微晶表现为橙红色发光,归属于Er^(3+)的^(4)F_(9/2)→^(4)I_(15/2)跃迁。同时,随着Mn^(2+)掺杂浓度x(原子数分数)的增大,Gd_(2)O_(3)∶10%Yb^(3+),1%Er^(3+),x%Mn^(2+)微晶的上转换发光强度呈现先增强后减弱的趋势,发光颜色也逐渐向红光移动,与CIE色坐标颜色区域相一致。同时,根据发光强度与激发功率关系分析了Gd_(2)O_(3)∶10%Yb^(3+),1%Er^(3+),x%Mn^(2+)微晶的上转换发光机制及可能存在的能量传递过程。In order to obtain up-conversion luminescent materials with bright red emission,a series of Yb^(3+),Er^(3+),Mn^(2+)-doped Gd_(2)O_(3) microcrystals were prepared by simple chemical precipitation method,and their morphology,structure and luminescent properties were characterized.The results show that Gd_(2)O_(3)∶10%Yb^(3+),1%Er^(3+)microcrystals exhibit a flower-like morphology,and the average diameter is 2.28μm.After calcination at high temperature,the sample presents a cubic Gd_(2)O_(3) structure with good crystallinity,and Mn^(2+)doping does not affect the morphology and crystal phase of the product.Under 980 nm near-infrared light excitation,Gd_(2)O_(3)∶10%Yb^(3+),1%Er^(3+)microcrystals show orange-red luminescence,which corresponds to the ^(4)F_(9/2)→^(4)I_(15/2) transition of Er^(3+).With the increase of Mn^(2+)doping concentration(molar fraction),the luminescence intensity of Gd_(2)O_(3)∶10%Yb^(3+),1%Er^(3+),x%Mn^(2+)microcrystals first increases and then decreases,and the luminescence color gradually turns to red,which is consistent with the CIE color coordinate.At the same time,the upconversion luminescence mechanism and the possible energy transfer process of Gd_(2)O_(3)∶10%Yb^(3+),1%Er^(3+),x%Mn^(2+)microcrystals were analyzed according to the relationship between luminescence intensity and excitation power.

关 键 词：上转换发光 掺杂Gd_(2)O_(3) 红光发射 能量传递 花状微晶 化学沉淀法 

分 类 号：O482.31[理学—固体物理]