Spectroscopic and temperature sensing properties of Sm^(3+) in self-activated CsLu(WO_(4))_(2) phosphors  

作　　者：Mingjun Song Jing Wang Zhi Xie Li Liu Wang Zhao Weiwei Zhou 

机构地区：[1]School of Chemistry,Chemical and Environmental Engineering,Weifang University,Weifang,261061,China [2]College of Mechanical and Electrical Engineering,Fujian Agriculture and Forestry University,Fuzhou,350002,China [3]School of Chemistry and Materials Engineering,Huainan Normal University,Huainan,232038,China

出　　处：《Journal of Rare Earths》2024年第11期2033-2042,I0002,共11页稀土学报（英文版）

基　　金：Project supported by the Natural Science Foundation (NSF)of Anhui Province (2108085MB53);the NSF for Distinguished Young Scholars of Anhui University (2022AH020087);University NSF of Anhui Province(KJ2020A0647)。

摘　　要：In this research,a series of Sm^(3+) doped CsLu(WO_(4))_(2) phosphors was prepared via high temperature solid phase technique to design new red phosphors and optical thermometric materials.Their structures,morphology,band gap and luminescence properties were characterized by X-ray diffraction,scanning electron microscopy,diffuse reflection and luminescence spectra,respectively.Under UV excitation,CsLu(WO_(4))_(2) gives rise to a blue broad emission band between 350 and 700 nm,which stems from the ^(3)T_(1u)→^(1)A_(1g) transition of WO_(6)^(6-) groups.When Sm^(3+) is introduced into CsLu(WO_(4))_(2),energy transfer between WO_(6)^(6-) groups and Sm^(3+) ions takes place in CsLu(WO_(4))_(2):Sm^(3+)phosphors,and color-tunable luminescence from blue to red is realized by controlling the Sm^(3+) doping concentration.The energy transfer efficiency between WO_(6)^(6-) groups and Sm^(3+) ons was analyzed,and the energy transfer mechanism was determined to be dipole-dipole interactions.According to the temperature-dependent luminescence spectra,WO_(6)^(6-)groups and Sm^(3+)ions exhibit large discrepancy in thermal quenching rates,and thus the temperature sensing properties of CsLu(WO_(4))_(2):Sm^(3+) in the temperature range of 283-403 K were analyzed.Based on the framework of fluorescence intensity ratio theory,the basic optical thermometry parameters including absolute and relative sensitivity of CsLu(WO_(4))_(2):Sm^(3+) we re calculated and the results show that it has great potential for application in optical thermometry.

关 键 词：PHOSPHORS Energy transfer Fluorescence intensity ratio Optical thermometry Rare earths 

分 类 号：TQ422[化学工程]