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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 50, Number 3
JKCSEZ 50(3)
June 20, 2006

Title	Li-doped Y₂SiO₅:Ce, Blue-emitting Phosphor Li-이온이 도핑된 Y₂SiO₅:Ce 청색 형광체
Author	Kiwan Jeon, Jung-Chul Park* 전기완, 박중철*
Keywords	Y₂SiO₅:Ce, Li 이온 도핑, 고상반응, 청색 형광체 , Y₂SiO₅:Ce, Li-ion doping, Solid-state reaction, Blue-emitting phosphor
Abstract	청색 형광체의 특성을 향상시키기 위하여 Y_1.99-xM_xCe_0.01SiO₅(M=Li, La, Nd, and Gd)를 환원분위기에서 1350 ^oC, 10시간동안 고상반응법으로 합성하였다. 상용품인 청색 형광체와 비교를 했을 때, 다양한 원소를 치환한 Y₂SiO₅:Ce 청색 형광체의 발광 특성이 우수 하다는 것을 관찰 할 수 있었다. 특히, 1 mol%의 Li 이온이 도핑된 Y₂SiO₅:Ce 청색 형광체의 광 발광 특성이 가장 높았다. Y₂SiO₅:(Ce,Li) 청색 형광체의 입도형상을 주사전자현미경으로 분석한 결과, 입자의 크기가 약 3 μm인 유사구형임을 확인하였다. The Y_1.99-xMxCe_0.01SiO₅(M=Li, La, Nd, and Gd) phosphors were synthesized by solid-state reaction at 1350^oC for 10h under reducing atmosphere in order to improve properties of blue emitting phosphors. Compared with commercial blue phosphors, the Y₂SiO₅:Ce blue phosphors substituted with various elements showed significant enhancement of the emission intensity. Particularly, 1 mol% Li doped Y₂SiO₅:Ce phosphors indicated the maximum emission intensity in the photoluminescence spectra. Thanks to SEM analyses revealed that the morphology of Y₂SiO₅:(Ce,Li) blue phosphors was a pseudo-spherical with particle size of 3 μm.
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