Abstract
In this study, CaY2Al4SiO12:xCe3+ (0.01 ≤ x ≤ 0.11) phosphors were prepared by using the sol–gel method. The crystal structure, morphology, and luminescence properties were well studied by means of X-ray diffraction (XRD), UV–vis, scanning electron microscope (SEM), and photoluminescence spectroscopy. The XRD patterns revealed that the CaY2Al4SiO12:xCe3+ (0.01 ≤ x ≤ 0.11) phosphors formed a cubic crystal structure with Ia3d space group, and a = b = c = 12.0089 lattice parameters. The band gap and the particle size of the prepared phosphors, estimated from the UV–vis spectrum and SEM micrograph, were found to be 3.35 eV and (30–100) nm, respectively. The phosphors showed an intense green emission band upon 449 nm excitation with the average color purity value of around 79 %. It is expected that the CaY2Al4SiO12:xCe3+ (0.01 ≤ x ≤ 0.11) phosphors can be used as a green component in the WLEDs application.
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