Luminescence tuning of Ce^3+,Pr^3+activated(Y,Gd)AGG system by band gap engineering and energy transfer  

作　　者：Yiyi Ou Weijie Zhou Fengkai Ma Chunmeng Liu Rongfu Zhou Fang Su Yan Huang Pieter Dorenbos Hongbin Liang 

机构地区：[1]MOE Key Laboratory of Bioinorganic and Synthetic Chemistry,KLGHEI of Environment and Energy Chemistry,School of Chemistry,Sun Yat-sen University,Guangzhou 510275,China [2]Beijing Synchrotron Radiation Facility,Institute of High Energy Physics,Chinese Academy of Sciences.Beijing 100039,China [3]Faculty of Applied Sciences,Delft University of Technology,Mekelweg 15,2629 JB,Delft,the Netherlands

出　　处：《Journal of Rare Earths》2020年第5期514-522,共9页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(21671201,U1632101,61905289,11904425);Postdoctoral Science Foundation of China(2017M622846,2019M663202)。

摘　　要：Tuning of phosphor luminescence properties,including the emission energy/intensity and thermal stability,is an important way to develop superior luminescent materials for diverse applications.In this work,we discuss the effect of band gap engineering and energy transfer on the luminescence properties of Ce^3+or Pr^3+doped(Y,Gd)AGG systems,and analyze the underlying reasons for their different phenomena.By using VUV-UV excitation spectra and constructing VRBE schemes,the changes of host band structure,5 d excited level energies and emission thermal stability of Ce^3+and Pr^3+with the incorporation of Gd^3+ions were studied.In addition,the energy transfer dynamics was also investigated in terms of the luminescence decay curves.This work demonstrates a way to tune phosphor luminescence properties by combining band gap engineering and energy transfer tailoring and provides an inspiring discussion on the different results of Ce^3+doping on the Ce^3+and Pr^3+emissions.

关 键 词：GARNET Scintillation Band gap engineering Energy transfer Rare earths 

分 类 号：TQ422[化学工程]