Using liquid phase precursor method to create a high-efficiency Ca2SiO4:Eu2+ green-emitting phosphor

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 Ca₂SiO₄ 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 4f⁶5d¹→4f⁷(⁸S_7/2) 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, Ca₂SiO₄:Eu²⁺ has an indisputable possibility in white light-emitting diodes WLEDs and fluorescent lighting.