Monodisperse spherical core-shell structured SiO2-CaTiO3 : Pr3+ phosphors for field emission displays
Data(s) |
2006
|
---|---|
Resumo |
Nanocrystalline CaTiO3:Pr3+ phosphor layers were coated on nonaggregated, monodisperse, and spherical SiO2 particles by the sol-gel method, resulting in the formation of core-shell structured SiO2-CaTiO3:Pr3+ particles. X-ray diffraction, Fourier transform infrared spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, photoluminescence, cathodoluminescence spectra, as well as lifetimes were utilized to characterize the core-shell structured SiO2-CaTiO3:Pr3+ phosphor particles. The obtained core-shell structured phosphors consist of well dispersed submicron spherical particles with a narrow size distribution. The thickness of the CaTiO3:Pr3+ shell could be easily controlled by changing the number of deposition cycles (about 70 nm for four deposition cycles). The core-shell SiO2-CaTiO3:Pr3+ particles show a strong red emission corresponding to D-1(2)-H-3(4) (612 nm) of Pr3+ under the excitation of ultraviolet (326 nm) and low voltage electron beams (1-5 kV). These particles may be used in field emission displays. |
Identificador | |
Idioma(s) |
英语 |
Fonte |
Liu XM;Jia PY;Lin J;Li GZ.Monodisperse spherical core-shell structured SiO2-CaTiO3 : Pr3+ phosphors for field emission displays,JOURNAL OF APPLIED PHYSICS,2006,99(12):文献编号:124902 |
Palavras-Chave | #SOL-GEL PROCESS #LUMINESCENT PROPERTIES #RED LUMINESCENCE #SOFT LITHOGRAPHY #SILICA SPHERES #THIN-FILMS #CATIO3 #FABRICATION #PARTICLES #Y2O3EU |
Tipo |
期刊论文 |