Hydrothermal synthesis and luminescent properties of LuBO{sub 3}:Tb{sup 3+} microflowers
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022 (China)
Hexagonal vaterite-type LuBO{sub 3}:Tb{sup 3+} microflower-like phosphors have been successfully prepared by an efficient surfactant- and template-free hydrothermal process directly without further sintering treatment. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) spectrometry, transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), photoluminescence (PL) and cathodoluminescence (CL) spectra as well as kinetic decays were used to characterize the samples. The as-obtained phosphor samples present flowerlike agglomerates composed of nanoflakes with thickness of 40 nm and high crystallinity in spite of the moderate reaction temperature of 200 deg. C. The reaction mechanism has been considered as a dissolution/precipitation mechanism; the self-assembly evolution process has been proposed on homocentric layer-by-layer growth style. Under ultraviolet excitation into the 4f{sup 8}{yields}4f{sup 7}5d transition of Tb{sup 3+} at 248 nm (or 288 nm) and low-voltage electron beam excitation, LuBO{sub 3}:Tb{sup 3+} samples show the characteristic green emission of Tb{sup 3+} corresponding to {sup 5}D{sub 4}{yields}{sup 7}F{sub 6,5,4,3} transitions with the {sup 5}D{sub 4}{yields}{sup 7}F{sub 5} transition (542 nm) being the most prominent group, which have potential applications in fluorescent lamps and field emission displays. - Graphical abstract: Hexagonal vaterite-type LuBO{sub 3}:Tb{sup 3+} microflower-like phosphors have been successfully prepared by a simple and mild hydrothermal process directly. The reaction mechanism has been considered as the dissolution/precipitation mechanism; the self-assembly evolution process has been proposed on homocentric layer-by-layer growth style. The luminescent properties of the as-obtained LuBO{sub 3}:Tb{sup 3+} samples have been investigated in detail, which shows it is a good green-emitting phosphor in fluorescent lamps and field emission displays potentially.
- OSTI ID:
- 21212048
- Journal Information:
- Journal of Solid State Chemistry, Vol. 181, Issue 10; Other Information: DOI: 10.1016/j.jssc.2008.06.045; PII: S0022-4596(08)00345-9; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BORATES
CATHODOLUMINESCENCE
DISSOLUTION
ELECTRON BEAMS
ELECTRON DIFFRACTION
FLUORESCENT LAMPS
FOURIER TRANSFORM SPECTROMETERS
HYDROTHERMAL SYNTHESIS
INFRARED SPECTRA
LAYERS
LUTETIUM COMPOUNDS
PHOTOLUMINESCENCE
PRECIPITATION
REACTION KINETICS
SCANNING ELECTRON MICROSCOPY
SINTERING
TEMPERATURE RANGE 0400-1000 K
TERBIUM IONS
THERMAL GRAVIMETRIC ANALYSIS
TRANSMISSION ELECTRON MICROSCOPY
ULTRAVIOLET RADIATION
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY