• Title/Summary/Keyword: Yb

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Synthesis and Optical Properties of M-Si(Al)-O-N (M: Sr, Ca) Phosphors for white Light Emitting Diodes (백색 발광다이오드용 M-Si(Al)-O-N (M: Sr, Ca) 형광체의 합성 및 발광 특성)

  • Lee, Seung-Jae;Lee, Jun-Seong;Kim, Young-Jin
    • Journal of the Microelectronics and Packaging Society
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    • v.19 no.2
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    • pp.41-45
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    • 2012

  • Oxynitride green phosphors for white light emitting diodes (LEDs) were synthesized and their optical properties were evaluated. The N/O ratio ($\delta$) of $SrSi_2O_{2-{\delta}}N_{2+2/3{\delta}}:Eu^{2+}$ closely depended on the synthesizing conditions. The most excellent green emission (545 nm), which was assigned to the $5d{\rightarrow}4f$ transition of $Eu^{2+}$ ions, was achieved at the conditions of $1700^{\circ}C$, 5 mol% $Eu^{2+}$, and $H_2$ atmosphere. The well-developed $Ca-{\alpha}-SiAlON:Yb^{2+}$ particles with homogeneous size were obtained at m = 3 (n = 0.15) for the compound of $Ca_{0.5m-0.005}Yb_{0.005}Si_{12-(m+n)}Al_{m+n}O_nN_{16-n}$, resulting in the strong green emission at around 550 nm.

  • https://doi.org/10.6117/kmeps.2012.19.2.041 인용 PDF KSCI

Zeeman Slowing of Yb Atoms

  • Park, Chang-Yong;Kim, Eok-Bong;Park, Sung-Jong;Yoon, Tai-Hyun;Yu, Sung-Kyu
    • Proceedings of the Optical Society of Korea Conference
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    • 2005.07a
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    • pp.276-277
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    • 2005

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