Using liquid phase precursor method to create a high-efficiency Ca2 SiO4 :Eu2+ green-emitting phosphor
Phuc Dang Huu, Dieu An Nguyen Thi
Abstract
A standard solid-state reaction (SSR), a new fluid phase preparatory method utilizing LPP-SiO2 (sol), and a water-based soluble silicone compound were employed to manufacture green Eu2+ -based Ca2 SiO4 phosphors liquid phase precursor (LPP-WSS). The generated phosphors feature large excitation spectra in the range of 225–450 nm and a strong green emission reaches the peak value at 502 nm owing to a 4f6 5d1 →4f7 (8 S7/2 ) transition of Eu2+ . These samples burned at 1100 1C produce the highest luminous intensity. The luminous properties of phosphors, which are manufactured by the liquid phase precursor LPP-WSS technique, were investigated at the range of 0.1-5.0 mol percent of Eu2+ , with the maximum emission density observed at the value of 3.0 mol percent of Eu2+ . The phosphors produced by the LPP-WSS technique exhibited a more uniform phase dispersion and higher luminous strength than those produced using the other procedures, according to a detailed report based on numerous characterizations. As a result, Ca2 SiO4 :Eu2+ has an indisputable possibility in white light-emitting diodes WLEDs and fluorescent lighting.
Keywords
Color homogeneity; Luminous flux; Monte Carlo theory; WLEDs; β-sialon:Eu2+
DOI:
https://doi.org/10.11591/eei.v11i3.3767
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Bulletin of EEI Stats
Bulletin of Electrical Engineering and Informatics (BEEI) ISSN: 2089-3191, e-ISSN: 2302-9285 This journal is published by the Institute of Advanced Engineering and Science (IAES) in collaboration with Intelektual Pustaka Media Utama (IPMU) .