La_(2)ATiO_(6)(A=Mg,Zn)∶Er^(3+)荧光材料的上转换发光特性及温度传感特性调控  

Up-conversion Luminescence and Temperature Sensing Properties of La_(2)ATiO_(6)(A=Mg,Zn)Phosphor

作　　者：温一诺 周柳艳 陈彦伶 林健华 付杰 陈书阳 韩明晓 李杰 邓德刚 陈亮[1] WEN Yi-nuo;ZHOU Liu-yan;CHEN Yan-ling;LIN Jian-hua;FU Jie;CHEN Shu-yang;HAN Ming-xiao;LI Jie;DENG De-gang;CHEN Liang(Institute of Optoelectronic Materials and Devices,China Jiliang University,Hangzhou 310018,China)

机构地区：[1]中国计量大学光电材料与器件研究所,浙江杭州310018

出　　处：《发光学报》2022年第10期1552-1563,共12页Chinese Journal of Luminescence

基　　金：国家自然科学基金(52172164);浙江省高等学校基础研究基金(2020YW21,2020YW23,2019YW03,2020YW31)资助项目。

摘　　要：Er^(3+)的上转换性能强烈依赖局部位置对称畸变。在本研究中,采用高温固相法制备了La_(2)Mg_(1-w)Zn_(w)TiO_(6)∶xEr^(3+)(x=0,0.02,0.04,0.06,0.08,0.10;w=0,0.3,0.5,0.7,1.0)系列荧光粉。基于XRD精修,Zn^(2+)的掺杂改变了La_(2)Mg⁃TiO_(6)晶体的配位环境,晶相由Pbnm转变为P2_(1/n)。在980 nm激光激发下,样品上转换荧光强度随Er^(3+)离子浓度改变,当Er^(3+)离子浓度为x=0.06时样品的上转换荧光强度最强。基于荧光强度比技术研究了样品La_(2)Mg_(1-w)ZnwTiO_(6)∶xEr^(3+)(x=0.06;w=0,0.3,0.5,0.7,1.0)在303~583 K温度范围内的上转换荧光温度传感特性。实验结果表明,灵敏度随着Mg^(2+)和Zn^(2+)掺杂浓度比例的改变而改变,在w=1.0时达到最大绝对灵敏度0.90%·K^(-1),说明Zn^(2+)的掺杂提高了La_(2)MgTiO_(6)的灵敏度。The up-conversion performance of Er^(3+)strongly depends on local position symmetry distor⁃tion.In this study,the series of La_(2(1-x))Zn_(w)Mg_((1-w))TiO_(6)∶xEr^(3+)(x=0.06;w=0,0.3,0.5,0.7,1.0)were prepared by solid state reaction at high temperature.According to XRD refinement,the coordination environment of La_(2)MgTiO_(6)crystal was changed by Zn^(2+)doping,and the crystal phase changed from Pbnm to P21/n.Besides,the up-conversion fluorescence intensity of the sample changed with the change of Er^(3+)ion concentration excited by a 980 nm laser,and the concentration of Er^(3+)was x=0.06 when the up-conversion fluorescence intensity was the highest.Based on the fluorescence intensity ra⁃tio technique,the temperature sensing properties of the samples La_(2(1-x))ZnwMg_((1-w))TiO_(6)∶xEr^(3+)(x=0.06;w=0,0.3,0.5,0.7,1.0)were studied from 303 K to 583 K.The results show that the sensitivity changes with the concentration ratio of Mg^(2+)and Zn^(2+)and reaches the maximum absolute sensitivity of 0.90%·K^(-1)when w=1.0,which indicatesthatthe doping of Zn^(2+) increasesthe sensitivity of La_(2)MgTiO_(6).

关 键 词：Er^(3+)掺杂 荧光粉 荧光性能 温度传感 

分 类 号：O482.31[理学—固体物理]