An optical thermometer with high sensitivity and superior signal discriminability based on dual-emitting Ce^(3+)/Eu^(2+)co-doped La5Si2BO13 thermochromic phosphor  

作　　者：Fuwen Liu Ying Tian Degang Deng Ming Wu Bowen Chen Liuyan Zhou Shiqing Xu 

机构地区：[1]Institute of Optoelectronic Materials and Devices,China Jiliang University,Hangzhou 310018,China

出　　处：《Journal of Rare Earths》2021年第11期1311-1319,I0001,共10页稀土学报（英文版）

基　　金：Project supported by Natural Science Foundation of Zhejiang Province,China(LY19E020005);Science and Technology Innovation Platform and Talent Plan of Zhejiang(2017R52037)。

摘　　要：A novel non-contact optical thermometer,qualified with high sensitivity and temperature resolution,is urgently needed for temperature measuring of micro devices,moving objects and specific severe environments.Hence,a series of dual-emitting La_(5)Si_(2)BO_(13):Ce^(3+),Eu^(2+)phosphors were synthesized.The two ions show diverse responses with the changing in temperature.The variational emissions of Ce^(3+)and Eu^(2+)can be converted to FIR(fluorescence intensity ratio)signals.The maximal absolute sensitivity Sa and relative sensitivity Sr reach up to 0.07526%/K and 3.2241%/K,respectively.It is worthy noting that the Sa and Sr possess the same variation tendency and both have high values in the low temperature region(293-373 K),showing the great temperature measuring property especially in low temperature region.The temperature sensing characteristics are superior to the results of most previous reports.The energy transfer(ET)process is certified to occur from Ce^(3+)to Eu^(2+)ions.These studies indicate that La_(5)Si_(2)BO_(13):Ce^(3+),Eu^(2+)phosphor could have a good prospect for optical thermometry.

关 键 词：La_(5)Si_(2)BO_(13) FIR Optical thermometry Energy transfer Rare earths 

分 类 号：TQ422[化学工程]