Photoluminescence and Ce^(3+)→Tb^(3+)→Eu^(3+) Energy Transfer Processes of the Ce^(3+)/Tb^(3+)/Eu^(3+)-doped β-NaYF_(4) Phosphors with Broadened Excitation Spectrum  

作　　者：HUANG Jianhua CHEN Nan WANG Xiaojing DU Guoping ZHANG Aisheng 黄建华;陈楠;WANG Xiaojing;杜国平;章爱生(School of Materials Science and Engineering,Nanchang University,Nanchang 330031,China;Hunan Engineering Laboratory for Control and Optimization of PV Systems,Hunan Vocational Institute of Technology,Xiangtan 411104,China)

机构地区：[1]School of Materials Science and Engineering,Nanchang University,Nanchang 330031,China [2]Hunan Engineering Laboratory for Control and Optimization of PV Systems,Hunan Vocational Institute of Technology,Xiangtan 411104,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2021年第1期33-43,共11页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(Nos.21571095,51362020);the Jiangxi Provincial Department of Education(No.KJLD13008);the Scientific Research Projects of Hunan Education Department(No.18C1442)。

摘　　要：Ce^(3+)/Tb^(3+) co-doped and Ce^(3+)/Tb^(3+)/Eu^(3+) tri-doped β-NaYF_(4) photoluminescent microcrystals using oleic acid as surfactant were synthesized using the solvothermal method.Their microstructural characteristics and photoluminescence properties were investigated in detail.They have the shape of hexagonal prism bipyramids with uniform particle size,which decreases with the concentrations of Tb^(3+) and Eu^(3+).The energy transfer processes of both the Ce^(3+)→Tb^(3+) and the Ce^(3+)→Tb^(3+)→Eu^(3+) were systematically studied.Compared with Eu^(3+) or Tb^(3+) single-doped β-NaYF_(4) microcrystals,the sensitization by Ce^(3+) for the photoluminescence of Tb^(3+) and Eu^(3+) leads to a broad excitation spectral bandwidth in the ultraviolet (UV) range.Meanwhile,the corresponding optical absorption efficiency is greatly enhanced.High energy transfer efficiencies have been observed from Ce^(3+) to Tb^(3+) and from Tb^(3+) to Eu^(3+).

关 键 词：lanthanide dopedβ-NaYF_(4) PHOTOLUMINESCENCE energy transfer broad excitation spectrum solvothermal method 

分 类 号：TQ422[化学工程]