한국전기전자재료학회논문지 (Journal of the Korean Institute of Electrical and Electronic Material Engineers)

  • 제26권4호
  • /
  • Pages.264-270
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  • 2013
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  • 1226-7945(pISSN)
  • /
  • 2288-3258(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
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CaMoO4:Tb3+ 녹색 형광체 분말과 박막의 제조와 발광 특성

Synthesis and Emission Properties of CaMoO4:Tb3+ Green Phosphor Powders and Thin Films

  • 전용일 (신라대학교 신소재공학과) ;
  • 조신호 (신라대학교 신소재공학과)
  • Jeon, Yongil (Department of Materials Science and Engineering, Silla University) ;
  • Cho, Shinho (Department of Materials Science and Engineering, Silla University)
  • 투고 : 2013.01.22
  • 심사 : 2013.03.01
  • 발행 : 2013.04.01
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초록

$CaMoO_4:Tb^{3+}$ green phosphor powders and thin films were successfully prepared by using the solid-state reaction method and the radio-frequency magnetron sputtering technique, respectively. The crystalline structure of all phosphor powders with different $Tb^{3+}$ ion concentrations was found to be a tetragonal system with the maximum diffraction intensity at $28.58^{\circ}$, while that of the phosphor thin films, irrespective of the type of substrate, was amorphous. As for the phosphor powders, the grain particles showed the chain-like patterns with inhomogeneous size distribution, the excitation spectra were composed of a broad band peaked at 307 nm and two small narrow bands centered at 381 and 492 nm, and the highest green emission spectrum was observed at 0.01 mol of $Tb^{3+}$ ions. As for the phosphor thin films, the average transmittance exceeding 85% was measured in the 400~1,100 nm range and the optical band gap showed a significant dependence on the type of substrate.

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