Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Influence of Fluxing Agents in Sr3SiO5:Eu2+ Phosphors for Fabrication of Warm White Light Emitting Diodes

따뜻한 백색 LED의 제조를 위한 Sr3SiO5:Eu2+ 형광체에서의 융제 첨가 영향

  • Kim, Hyun-Ho (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Chung, Kang-Sup (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Lee, Seoung-Won (Department of Metallurgical Engineering, Chungnam National University) ;
  • Kim, Byoung-Gyu (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources)
  • 김현호 (한국지질자원연구원 광물자원연구본부) ;
  • 정강섭 (한국지질자원연구원 광물자원연구본부) ;
  • 이승원 (충남대학교 응용소재학과) ;
  • 김병규 (한국지질자원연구원 광물자원연구본부)
  • Received : 2011.09.29
  • Accepted : 2012.01.05
  • Published : 2012.01.31
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Abstract

In this paper, a yellow phosphor $Sr_3SiO_5:Eu^{2+}$ that emits efficiently at the 450 nm excitation for warm white LED is studied. In addition, the effects of various flux $BaF_2$, $NH_4Cl$ on the emission spectra were investigated. The samples were synthesized through conventional solid state reaction under reducing atmosphere of 95% $N_2$-5% $H_2$ mixture at the high temperature. All phosphors showed a excitation band from 450 nm and broad band emission peaking at region of 580 nm. The optimal concentration of $BaF_2$ flux is 3 wt% for $Sr_3SiO_5$ with doping 0.05mol Eu phosphors fired in a reductive atmosphere. The phosphor showed highest emission peaking at 582 nm.

Keywords

References

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