A ratiometric optical thermometer with dual-color emission based on Eu^(2+)-doped CsCu_(2)I_(3) microcrystals  

作　　者：Xiaorong Li Ge Gao Kaiyu Wang Zhaoqiong Chen Zejiang Gao Qingyong Qin Li Chen Bingsuo Zou 

机构地区：[1]State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures,School of Physical Science and Technology,Guangxi University,Nanning,530004,China [2]School of Resources,Environments and Materials,Guangxi University,Nanning,530004,China

出　　处：《Journal of Rare Earths》2024年第8期1429-1436,I0001,共9页稀土学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (62205072);Natural Science Foundation of Guangxi(2022GXNSFBA035656);Science and Technology Agency of Guangxi (GuikeAD20159054);Education Department of Guangxi (2019KY0004)。

摘　　要：With the increasing demand for non-co ntact fluorescence intensity ratio-based optical thermometry,novel phosphor materials with high-efficiency,dual-emitting centers,and differentiable temperature sensitivity are highly desired,In this wo rk,rare earth Eu^(2+) ions were incorporated Wnto CsCu_(2)I_(3) microcrystals by solidstate reaction,Under a single UV excitation,the as-synthesized samples exhibit two emissions:452 nm blue emission from the 5d→4f transition of Eu^(2+)and 582 nm yellow emission from self-trapped exciton e mission of CsCu_(2)I_(3).The photoluminescence quantum yield reaches to 50%,The dual-band emission of Eu^(2+)-doped CsCu_(2)I_(3) shows different temperature responses in the range of 260-360 K.Based on fluorescence intensity ratio technology,the maximum absolute sensitivity and re Iative sensitivity are 0.091 K^(-1)(at 360 K) and 2.60%/K(at 260 K),respectively.These results suggest that Eu^(2+)-doped GsCu_(2)I_(3) could be a good candidate for highly sensitive optical thermometer.

关 键 词：CsCu_(2)I_(3) Eu^(2+)-doping Fluorescence intensity ratio Optical thermometer Rare earths 

分 类 号：TH811[机械工程—仪器科学与技术]