Ca3MgSi2O8:Eu2+(x = 0.003, 0.005, 0.007, 0.01, 0.03 mol) white phosphors for Light Emitting Diodes(LED) are synthesized with different concentrations of Eu2+ ions using a solid state reaction method. The crystal structures, surface and optical properties of the phosphors are investigated using X-Ray Diffraction(XRD), Scanning Electron Microscope(SEM) and photoluminescence(PL). The X-Ray Diffraction results reveals that the crystal structure of the Ca3MgSi2O8:Eu2+ is a monoclinic system. The particle size of Ca3MgSi2O8:Eu2+ white phosphors is about 1~5 μm, as confirmed by SEM images. The maximum emission spectra of the phosphors are observed at 0.01 mol Eu2+ concentration. The decrease in PL intensity in the Ca3MgSi2O8:Eu2+ white phosphors with Eu2+ concentration is interpreted by concentration quenching. The International Commission on Illumination(CIE) coordinate of 0.01 mol Eu doped Ca3MgSi2O8 is X = 0.2136, Y = 0.3771.

Abstract
 1. 서 론
 2. 실험 방법
 3. 실험 결과
  3.1 XRD
  3.2 SEM
  3.3 PL
  3.4 CIE diagram
 4. 결 론
 References

• 유 일(동의대학교 교양대학) | Il Yu (College of Liberal Studies, Dong-Eui University) Corresponding author