Er 첨가에 따른 백색 LED용 ZnS:Mn 황색 형광체의 발광특성 = Luminescent characteristic of Er co-doped ZnS:Mn yellow phosphors for Light Emitting Diodes

다국어 초록 (Multilingual Abstract)

Er co-doped ZnS:Mn phosphors were prepared by solid state reaction method in air at 1000 ℃ for 4h. The optical properties and structures of ZnS:Mn,Er phosphors were investigated by X-ray diffraction, Photoluminescence and Scanning Electro Microscopy. ZnS:Mn phosphors showed XRD patterns of hexagonal structure, and Er(2)O(3) structure in ZnS:Mn Er with increasing concentration of Er were observed from XRD. The particle size of Er non-doped ZnS:Mn phosphors was about 15 μm and particle size of the phosphors decreased with doping Er. The luminescence of 580 nm in ZnS:Mn,Er phosphors was associated with (4)T(1)→(6)A(1) transition of Mn(2+) ions. Photoluminescence intensity of ZnS:Mn doped with Er 0.5 mol% was definitely higher than that of Er non-doped sample. The enhanced photoluminescent intensity in the ZnS:Mn,Er phosphors was interpreted by energy transfer from Er(3+) to Mn(2+).

참고문헌 (Reference)

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