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Received July 9, 2006
Accepted August 11, 2006
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분무열분해 공정에 의해 제조된 Ba2-xSrxSiO4:Eu2+ 형광체의 발광특성
The Photoluminescence Characteristic of Ba2-xSrxSiO4:Eu2+ Phosphor Particles Prepared by Spray Pyrolysis
한국과학기술원 생명화학공학과, 305-701 대전시 유성구 구성동 373-1 1건국대학교 화학공학과, 143-701 서울시 광진구 화양동 1
Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, 373-1, Guseong-dong, Yuseong-gu, Daejeon 305-701, Korea 1Department of Chemical Engineering, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, Korea
Korean Chemical Engineering Research, December 2006, 44(6), 609-613(5), NONE Epub 2 January 2007
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Abstract
분무열분해법에 의해 장파장 UV 여기원 하에서 높은 발광세기를 가지는 Ba2-x.Srx.SiO4:Eu2+ 형광체를 제조하였다. 분무열분해공정 의해 제조된 Ba2-x.Srx.SiO4:Eu2+ 형광체의 발광특성, 분말 형태 및 결정성에 대해 조사하였다. 분무열분해 공정에 의해 제조된 Ba2-x.Srx.SiO4:Eu2+ 형광체는 모체를 구성하는 바륨과 스트론튬의 비에 따라 청녹색에서 황색에 이르기까지 다양한 파장대의 색을 구현할 수 있었다. x = 0인 Ba2SiO4:Eu2+ 형광체의 경우 발광 중심파장이 500 nm 였으며, x = 2인 Sr2SiO4:Eu2+ 형광체의 경우 발광중심 파장이 554 nm였다. 분무열분해 공정에 의해 제조된 Ba2-x.Srx.SiO4:Eu2+ 형광체는 구형의 형상을 띄지만 중공성의 입자 특성을 가졌다. 반면에 후열처리 과정을 거친 Ba2-x.Srx.SiO4:Eu2+ 형광체는 큰 입자 크기와 불규칙한 형태를 가졌다. Ba1.488Sr0.5SiO4:Eu0.012 2+ 형광체가 환원분위기 하에서 후열처리 온도 1,200 ℃에서 3시간 동안 후열처리 과정을 거쳤을 때 최적의 발광 세기를 가졌다.
Ba2-xSrxSiO4:Eu2+ phosphor particles with the high photoluminescence (PL) intensity under long wavelength ultraviolet (UV) were prepared by spray pyrolysis. The photoluminescence, morphological and crystalline characteristics of Ba2-x.Srx.SiO4:Eu2+ phosphor particles prepared by spray pyrolysis were investigated. Ba2-x.Srx.SiO4:Eu2+ phosphor particles prepared by spray pyrolysis had various colors from bluish green to yellow by changing the ratio of barium and strontium of the host material. In case of x=0, the main emission peak of Ba2SiO4:Eu2+ phosphor was 500 nm. In case of x=2, the main emission peak of Sr2SiO4:Eu2+ phosphor was 554nm. Ba2-x.Srx.SiO4:Eu2+ phosphor particles obtained by spray pyrolysis had spherical shape and hollow structure. On the other hand, the post-treated Ba2-x.Srx.SiO4:Eu2+ phosphor particles had large size and irregular shape. The Ba1.488Sr0.5SiO4:Eu0.012 2+ phosphor particles had the maximum PL intensity after post-treatment at temperature of 1300℃ for 3h under reduction atmosphere.
Keywords
References
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