STRONTIUM SILICATE-BASED PHOSPHOR SHOWING A BROAD SPECTRUM OF WAVELENGTHS OF BETWEEN 500 AND 700 NM, PREPARATION METHOD THEREOF AND LIGHT-EMITTING DIODE USING THE SAME

摘要

PURPOSE: Provided is a strontium silicate-based phosphor, which shows a broad spectrum of wavelengths of between 500 and 700 nm, has improved color purity and gives stable light-emitting characteristics for a long time even under high temperature. CONSTITUTION: The strontium silicate-based phosphor is represented by the formula of Sr3-xSiO5:Eu2+, wherein x ranges from 0 to 1 (excluding 0). The strontium silicate-based phosphor is prepared by the method comprising the steps of: forming a mixture containing strontium carbonate(SrCO3), silica(SiO2) and europium oxide(Eu2O3); drying the mixture; and heat-treating the dried mixture under reductive atmosphere. A light-emitting diode includes a light-emitting chip(104), and the strontium silicate-based phosphor(108) excited by the light emitted from the light-emitting diode chip(104).