摘要
提高发光效率是上转换材料研究中尚需解决的关键问题。通过在BaWO_(4)∶Tm^(3+)/Yb^(3+)荧光粉中掺入Gd^(3+),研究其对上转换发光效率和温度传感特性的影响。结果表明,Gd^(3+)的掺杂使激活离子Tm^(3+)的上转换发光强度显著增强,其中Tm^(3+)的蓝光(~485 nm)辐射增强31倍。利用荧光强度比方法研究了基于Tm^(3+)的^(3)F_(2,3)和^(3)H_(4)两个热耦合能级在313 K~573 K范围内的光学温度传感特性,BaWO_(4)∶Tm^(3+)/Yb^(3+)/Gd^(3+)测温灵敏度最大值为0.0119 K^(-1)。可见,BaWO_(4)∶Tm^(3+)/Yb^(3+)/Gd^(3+)具有高的上转换发光效率和测温灵敏度,可应用于荧光测温传感器的开发。
The enhancement of the upconversion(UC)luminescence efficiency is a key problem for UC emission materials.In this paper,the BaWO_(4)∶Tm^(3+)/Yb^(3+)/Gd^(3+) phosphor was prepared.The UC luminescence and temperature sensing properties were investigated.The results confirmed that the UC emission intensities were enhanced by doping Gd^(3+) ions.The blue light(~483 nm)emission intensity of Tm^(3+) ions was increased 31 times.The temperature sensing characteristics of the two thermally coupled energy levels of ^(3)F_(2,3) and ^(3)H_(4) based on Tm^(3+) were studied with the fluorescence intensity ratio technology in the range of 313 K to 573 K.The maximum sensitivity of the BaWO_(4)∶Tm^(3+)/Yb^(3+)/Gd^(3+)sample was 0.0119 K^(-1).The research results confirmed that the BaWO_(4)∶Tm^(3+)/Yb^(3+)/Gd^(3+)phosphor has high UC emission efficiency and temperature measurement sensitivity,and it can be applied to the development of fluorescence temperature sensor.
作者
张玉红
郑禹豪
刘鸣泰
王凯琳
刘航
ZHANG Yu-hong;ZHENG Yu-hao;LIU Ming-tai;WANG Kai-lin;LIU Hang(School of Electrical and Computer Engineering,Jilin Jianzhu University,Changchun 130118,China)
出处
《稀土》
CAS
CSCD
北大核心
2022年第2期99-107,共9页
Chinese Rare Earths
基金
国家自然科学基金项目(61705077)
吉林省科技厅重点研发项目(20190303064SF,20200403072SF)
吉林省发改委科技创新项目(2019C048-4,2020C021-5)
吉林省教育厅科学研究项目(JJKH20190853KJ)。
关键词
上转换发光
荧光强度比
灵敏度
upconversion
fluorescence intensity ratio
sensitivity
