Fabrication and luminescent properties of the core-shell structured YNbO{sub 4}:Eu{sup 3+}/Tb{sup 3+}SiO{sub 2} spherical particles

Journal Article · Fri Aug 15 04:00:00 EDT 2008 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2008.04.025· OSTI ID:21128396

Piaoping, Yang ^[1]; Zewei, Quan; Chunxia, Li; Jun, Yang; Huang, Wang; Xiaoming, Liu ^[1]

---

1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022 (China)

The core-shell structured YNbO{sub 4}:Eu{sup 3+}/Tb{sup 3+}SiO{sub 2} particles were realized by coating the YNbO{sub 4}:Eu{sup 3+}/Tb{sup 3+} phosphors onto the surface of spherical silica via a sol-gel process. The obtained materials were characterized by means of X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), Fourier transform IR spectroscopy (FT-IR), photoluminescence (PL) spectra, and cathodoluminescence (CL) spectra. The results indicate that 600 deg. C annealed samples consist of amorphous silica core and crystalline YNbO{sub 4}:Re shell, having perfect spherical morphology with uniform size distribution. Upon excitation by UV or electron beam, these phosphors show the characteristic {sup 5}D{sub 0}-{sup 7}F{sub 1-4} emission lines of Eu{sup 3+} and the characteristic {sup 5}D{sub 4}-{sup 7}F{sub 3-6} emission lines of Tb{sup 3+}. The PL intensities of Eu{sup 3+} can be tuned by altering the annealing temperature and the coating number of YNbO{sub 4}:Eu{sup 3+} layers. - Graphical abstract: YNbO{sub 4}:Eu{sup 3+}/Tb{sup 3+} layers were deposited on spherical SiO{sub 2} particles via a sol-gel process, resulting in the formation of core-shell structured YNbO{sub 4}:Eu{sup 3+}/Tb{sup 3+}SiO{sub 2} phosphors. The luminescence properties of phosphors in the core-shell particles can be tuned by altering the annealing temperature and the coating layers of the phosphors.

• OSTI ID: 21128396
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 8 Vol. 181; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ANNEALING
CATHODOLUMINESCENCE
ELECTRON BEAMS
EUROPIUM IONS
FABRICATION
FIELD EMISSION
INFRARED SPECTRA
LAYERS
MORPHOLOGY
NIOBIUM OXIDES
PHOSPHORS
PHOTOLUMINESCENCE
SCANNING ELECTRON MICROSCOPY
SHELLS
SILICON OXIDES
SOL-GEL PROCESS
SPHERICAL CONFIGURATION
TEMPERATURE RANGE 0400-1000 K
TERBIUM IONS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
YTTERBIUM OXIDES