کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1797357 1023780 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and characterization of spherical Sr2CeO4 phosphors by spray pyrolysis for field emission displays
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Synthesis and characterization of spherical Sr2CeO4 phosphors by spray pyrolysis for field emission displays
چکیده انگلیسی

A blue emitting Sr2CeO4 phosphor with a one-dimensional structure has been prepared by a two-step spray pyrolysis (SP) method, starting from the aqueous solutions of metal nitrates with citric acid and polyethylene glycol (PEG) as additives. The material is ultimately designed for field emission displays (FEDs). X-ray diffraction (XRD), thermogravimetric and differential thermal analysis (TG-DTA), field emission scanning electron microscope pictures (FE-SEM) as well as photoluminescence (PL) and cathodoluminescence (CL) spectroscopy and lifetime measurements have been employed to characterize the samples. The morphology, PL and low voltage CL properties of Sr2CeO4 phosphors as-prepared using the SP method have been investigated by changing the concentration of the precursor solution, concentration of PEG, annealing temperature, acceleration voltage and filament current. The obtained Sr2CeO4 phosphor particles are spherical and of submicron size, 0.5–2 μm. The emission spectrum of the phosphors shows a broad band with maximum at 467 nm (lifetime=37.4 μs; CIE chromaticity coordinates: x=0.15x=0.15 and y=0.21y=0.21), presumably due to a ligand-to-metal charge-transfer transition.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 290, Issue 1, 15 April 2006, Pages 266–271
نویسندگان
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