Abstract
Green-phosphor spherical microparticles (2–4 μm in diameter) of CaWO 4:Tb 3+ (CWO:Tb) exhibiting excellent emission at 545 nm have been synthesized by a conventional hydrothermal process directly without further sintering treatment. X-ray diffraction (XRD), scanning electron microscope (SEM), photoluminescence excitation and emission spectra and decay curve were used to characterize the CWO:Tb phosphors. Because 12 at.% CWO:Tb phosphor shows broad and strong absorption in UV region, exhibits intensive green emission under 254 nm excitation in comparison with the commercial green fluorescent lamp phosphor (LaPO 4:Ce,Tb), it is considered to be a new promising phosphor for fluorescent lamps application.
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