A strategy for enhancing luminescence thermometry via Ta^(5+)-triggered K_(0.5)Na_(0.5)NbO_(3):Er^(3+)transparent ceramics  

作　　者：Quan Zhang Zetian Yang Mingyuan Wang Yang Liu Shuangying Lei Laihui Luo Dirk Poelman 

机构地区：[1]Key Laboratory of MEMS of Ministry of Education,School of Electrical Science and Engineering,Southeast University,Nanjing,210096,China [2]LumiLab,Department of Solid State,Sciences,Ghent University,Krijgslaan 281-S1,Ghent,B-9000,Belgium [3]School of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing,210094,China [4]Department of Microelectronic Science and Engineering,Ningbo University,Ningbo,315211,China

出　　处：《Journal of Materiomics》2024年第5期984-994,共11页无机材料学学报（英文）

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.11774052);the Postgraduate Research&Practice Innovation Program of Jiangsu Province(SJCX22_0048).

摘　　要：Luminescence thermometry is a reliable approach for remote thermal sensing,and extensive studies have been devoted to designing a luminescence thermometer with heightened thermal sensitivity.Herein,we report a promising luminescence thermometric material,Ta^(5+)-substituted K_(0.5)Na_(0.5)NbO_(3):0.003Er^(3+)transparent ferroelectric ceramics.The temperature sensing sensitivity is significantly improved by adjusting the concentration of Ta^(5+)in the material.Specifically,utilizing the fluorescence intensity ratio from the 2H_(11/2) and 4S_(3/2) thermally coupled states of Er^(3+)as a detecting signal within the temperature range of 273–543 K,an optimal maximum absolute sensitivity of 0.0058 K–1 and relative sensitivity of 0.0158 K–1 are achieved for K_(0.5)Na_(0.5)NbO_(3):0.65Ta^(5+)/0.003Er^(3+).Simultaneously,as the concentration of Ta5+increase,a unique evolution of structural phase transitions is observed from orthorhombic to tetragonal and then to cubic.This is accompanied by an improvement in luminescence temperature sensing properties,and the best sensitivity is demonstrated in the cubic-phase region.Intriguingly,a huge change in infrared luminescence properties as a function of temperature is found around the structure transition temperature of the samples.These results indicate a promising potential for achieving highly sensitive thermometry or monitoring phase structure transitions through luminescence thermometry behavior in the K_(0.5)Na_(0.5)NbO_(3) host.

关 键 词：Transparent ceramics Temperature sensing Phase transition Upconversion emission 

分 类 号：O61[理学—无机化学]