Photoluminescence and energy transfer in transparent glass-ceramics based on GdF3:RE3+（RE=Tb,Eu）nanocrystals

作     者：Natalia Pawlik Barbara Szpikowska-Sroka Ewa Pietrasik Tomasz Goryczka Wojciech A.Pisarski 

作者机构：Institute of ChemistryUniversity of Silesia9 Szkolna StreetKatowice 40-007Poland Institute of Materials ScienceUniversity of Silesia75 Putku Piechoty 1A StreetChorzow 41-500Poland 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2019年第37卷第11期

页      面：1137-1144页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 070205[理学-凝聚态物理] 08[工学] 0708[理学-地球物理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0702[理学-物理学] 

基　　金：Project supported by the National Science Centre(Poland)(2016/23/B/ST8/01965) 

主　　题：Sol-gel method GdF3 nanocrystals Terbium Europium Rare earths 

摘      要：In the present work,the transparent oxyfluoride glass-ceramic samples containing GdF3:RE^3+(RE=Tb,Eu)nanocrystals(nGCs)were fabricated via controlled heat-treatment of precursor xerogels prepared using a sol-gel *** formation of GdF3 nanocrystalline phase from gadolinium(III)trifluoroacetate was verified based on XRD *** average crystal sizes calculated from Scherrer formula were estimated to^10 nm as well as^6 nm for Tb^3+-and Eu^3+-doped samples,*** optical behavior of prepared sol-gel samples was evaluated based on photoluminescence excitation(PLE)and emission spectra(PL)as well as luminescence decay *** samples exhibit the 5D4→7FJ(J=6-3,Tb3+)and the 5D0→7FJ(J=0-4,Eu3+)emission bands recorded within the visible spectral area under excitation at near-UV(393 nm(Eu^3+),351,369,378 nm(Tb^3+))as well as middle-UV illumination(273 nm(Gd3+)).Additionally,based on recorded decay curves,the luminescence lifetimes(τm)for the 5D4(Tb^3+)and the 5D0(Eu3+)excited states were also *** general,recorded luminescence spectra and double-exponential character of decay curves for nGCs indicate a successful migration of Tb^3+and Eu^3+dopant ions from amorphous silicate framework to lowphonon energy GdF3 nanocrystal phase.