| 따뜻한 백색 LED의 제조를 위한 Sr3SiO5:Eu2+ 형광체에서의 융제 첨가 영향 |
| 김현호, 정강섭, 이승원1, 김병규 |
한국지질자원연구원 광물자원연구본부
1충남대학교 응용소재학과 |
| Influence of Fluxing Agents in Sr3SiO5:Eu2+ Phosphors for Fabrication of Warm White Light Emitting Diodes |
| Hyun-Ho Kim, Kang-Sup Chung, Seoung-Won Lee1, Byoung-Gyu Kim |
Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources
1Department of Metallurgical Engineering, Chungnam National University |
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| ABSTRACT |
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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. |
| Key words:
Warm white LED, Phosphor, Flux, $Sr_3SiO_5:Eu^{2+}$ |
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