摘要
通过高温固相法制备出一系列新型上转换材料Sc_(2)(WO_(4))_(3)∶Er^(3+)/Yb^(3+)。在980 nm激光激发下,Sc_(2)(WO_(4))_(3)∶Er^(3+)/Yb^(3+)样品发出肉眼可见的强绿光。利用荧光光度计测得样品的发光光谱,在500~600 nm之间有强绿光发射,分别归因于Er^(3+)的^(2)H_(11/2)→^(4)I_(15/2)和^(4)S_(3/2)→^(4)I_(15/2)跃迁发射。在650~700 nm位置处,有对应于Er^(3+)离子^(4)F_(9/2)→^(4)I_(15/2)跃迁的较弱的红光发射。随着掺杂浓度的变化,样品的红绿分支比发生变化。当样品掺杂Er^(3+)浓度为0.05%、Yb^(3+)浓度等于0.1%时,样品发射的绿光强度是红光强度的27倍。另外,利用荧光强度比方法研究了Er^(3+)的两个热耦合能级在303~573 K范围内的发光温度特性。393 K时,样品的灵敏度达到最大为0.0068 K^(-1)。对比于其他荧光粉材料,Sc_(2)(WO_(4))_(3)∶Er^(3+)/Yb^(3+)的灵敏度处于较高水平,在实际测温中具有更好的应用前景。
A series of upconversion materials Er^(3+)/Yb^(3+)co-doped Sc_(2)(WO_(4))_(3)have been prepared by a high-temperature solid-phase method.Under the 980 nm near-infrared laser,the green emission intensity of the up-conversion luminescence is greater than that of the red,and the green light is visible to the naked eyes.When 0.05%Er^(3+)and 0.1%Yb^(3+)are doped,the green emission is 27 times more than the red emission.Furthermore,the fluorescence intensity ratio method was used to describe the optical temperature sensor with two thermal coupling energy levels of Er^(3+)in the range of 303~573 K.At 393 K,the sensitivity of the sample reached the maximum 0.0068 K^(-1).Compared with some reported materials,the sensitivity of Sc2(WO)3∶Er^(3+)/Yb^(3+)is higher and it has a better prospect in temperature measurement.
作者
金叶
李坤
罗旭
马力
王笑军
JIN Ye;LI Kun;LUO Xu;MA Li;WANG Xiao-jun(School of Science, Chongqing University of Technology, Chongqing 400054, China;Department of Physics, Georgia Southern University, Statesboro GA 30460, USA)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2021年第1期91-97,共7页
Chinese Journal of Luminescence
基金
国家自然科学基金(11704054)
国家留基委项目(201908500037)
重庆市科委项目(cstc2017jcyjA0925,cstc2017jcyjAX0046)
重庆市教委项目(KJQN201901134,KJ1704071)资助。
关键词
掺杂
上转换材料
发光
温度传感
doping
upconversion materials
luminescence
temperature sensing
