Sol-gel growth of Gd2MoO6 : Eu3+ nanocrystalline layers on SiO2 spheres (SiO2@Gd2MoO6 : Eu3+) and their luminescent properties


Autoria(s): Li GZ; Wang ZL; Quan ZW; Liu XM; Yu M; Wang RS; Lin J
Data(s)

2006

Resumo

SiO2@Gd2MoO6:EU3+ core-shell phosphors were prepared by the sol-gel process. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectra (EDS), transmission electron microscopy ITEM), photoluminescence (PL) spectra as well as kinetic decays were used to characterize the resulting SiO2@Gd2MoO6:Eu3+ core-shell phosphors. The XRD results demonstrate that the Gd2MoO6:Eu3+ layers on the SiO2 spheres begin to crystallize after annealing at 600 degrees C and the crystallinity increases with raising the annealing temperature. The obtained core-shell phosphors have a near perfect spherical shape with narrow size distribution (average size ca. 600 nm), are not agglomerated, and have a smooth surface. The thickness of the Gd2MoO6:Eu3+ shells on the SiO2 cores could be easily tailored by varying the number of deposition cycles (50 nm for four deposition cycles). The Eu3+ shows a strong PL luminescence (dominated by D-5(0)-F-7(2) red emission at 613 nm) under the excitation of 307 nm UV light.

Identificador

http://ir.ciac.jl.cn/handle/322003/16443

http://www.irgrid.ac.cn/handle/1471x/152159

Idioma(s)

英语

Fonte

Li GZ;Wang ZL;Quan ZW;Liu XM;Yu M;Wang RS;Lin J.Sol-gel growth of Gd2MoO6 : Eu3+ nanocrystalline layers on SiO2 spheres (SiO2@Gd2MoO6 : Eu3+) and their luminescent properties,SURFACE SCIENCE,2006,600(16):3321-3326

Palavras-Chave #CORE-SHELL PARTICLES #SILICA SPHERES #OPTICAL-PROPERTIES #THIN-FILMS #PHOSPHORS #OXIDE #NANOPARTICLES #DISPERSIONS #HEMATITE
Tipo

期刊论文