CALCIUM SILICOPHOSPHATE-BASED GREEN ELECTROLUMINESCENT PHOSPHOR CAPABLE OF LIGHT-EMITTING WITH HIGH EFFICIENCY BY USING UV LED OF SHORT WAVELENGTH AS AN EXCITATION LIGHT SOURCE

摘要

PURPOSE: A calcium silicophosphate-based green electroluminescent phosphor is provided to be excited by an excitation light source of 250-450 nm, thereby imparting excellent luminescent brightness, and color purity.;CONSTITUTION: A manufacturing method of calcium silicophosphate-based green electroluminescent phosphor comprises: a step of manufacturing a precursor mixture by weighing calcium precursor, silicon precursor, phosphorous precursor, and europium precursor within the content range of chemical formula 1: Ca_(7-x)(SiO_4)_2(PO_4)_2:xEu (0 x 0.35); a step of drying the precursor mixture at 100-150 C; and a step of reductive heat treating the mixture at 1100-1200 C under hydrogen reductive atmosphere.;COPYRIGHT KIPO 2012