Enhancement of ultraviolet upconversion photoluminescence of Y_(7)O_(6)F_(9):Pr,Gd induced by Li^(+)codoping  

作　　者：Huaiyong Li Yang Sun Jinfeng Zhang Ziyi Zhang Yangbo Wang Chengchao Hu Xufeng Zhou Shanshan Du Jigong Hao Wei Li 

机构地区：[1]School of Materials Science and Engineering,Liaocheng University,Liaocheng,252059,China [2]Laboratory of Sensitive Materials and Devices Shandong Department of Education,School of Materials Science and Engineering,Liaocheng University,Liaocheng,252059,China

出　　处：《Journal of Rare Earths》2025年第4期684-690,I0002,共8页稀土学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(51701091,12004148,12104199,12204216);the Natural Science Foundation of Shandong Province(ZR2021QA057);the Shandong Province Science and Technology Small and Medium Sized Enterprise Innovation Ability Enhancement Project(2023TSGC0352);the Innovation Team of Higher Educational Science and Technology Program of Shandong Province(2019KJA025)。

摘　　要：Ultraviolet upconversion photoluminescence materials have great potential in various fields,but the improvement of the upconversion efficiency is challenging.Codoping of Li^(+)is considered as an effective strategy and widely used to improve the photoluminescence properties of phosphors.In this paper,Li^(+)is introduced into a Y_(7)O_(6)F_(9):Pr^(3+),Gd^(3+)system.The effect of Li^(+)codoping on the phase purity,crystal structure,micro structure,downshifting and upconversion photo luminescence as well as the decay dynamic of the phosphors was studied.It is revealed that the overall photoluminescence efficiency and the energy transfer efficiency from pr^(3+)to Gd^(3+)are greatly promoted.The downshifting and upconversion photoluminescence increase by 2.58 and 10 times as 6 mol%of Li^(+)is codoped.The photo luminescence decay dynamic study shows that the~3P_(0)state decays slower in the Li^(+)-containing phosphor than the Li^(+)-free one.The improvement of the photoluminescence properties is due to the increase of the crystallinity and the reduce of the quenching center.

关 键 词：UPCONVERSION PHOTOLUMINESCENCE Li^(+)-codoping OXYFLUORIDE Gadolinium PRASEODYMIUM Rare earths 

分 类 号：O482.31[理学—固体物理]