Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of Heat-treatment Atmosphere on Photoluminescence of Eu-doped Li-Al-O System

열처리 분위기가 Eu 이온이 첨가된 Li-Al-O계 형광체 특성에 미치는 영향

  • Kim, Jeong Seog (Department of Display Engineering, Hoseo University) ;
  • Cheon, Chae Il (Department of Materials Science and Engineering, Hoseo University) ;
  • Chae, Ki-Woong (Department of Materials Science and Engineering, Hoseo University)
  • 김정석 (호서대학교 디스플레이공학과) ;
  • 천채일 (호서대학교 신소재공학과) ;
  • 채기웅 (호서대학교 신소재공학과)
  • Received : 2013.09.11
  • Accepted : 2013.12.20
  • Published : 2014.01.31
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Abstract

New green phosphor is synthesized by reducing $LiAlO_2:xEu^{3+}$ phosphors in a low pressure $H_2$ atmosphere. The $LiAlO_2:xEu^{3+}$ prepared by a solid state reaction method is reported as red phosphor. The effect of the reduction treatment on the $LiAlO_2:xEu^{3+}$ on the crystalline phase change and photoluminescence (PL) property are characterized. The reduced phosphor had a broad green light spectrum centered at 524 nm. The PL intensity of the reduced phosphor increased to a maximum at the reduction temperature of $1100^{\circ}C$. The PL intensity decreased with a further increase in the reduction temperature. The crystalline phase constituting the reduced phosphor varied with the temperature. A new crystalline phase $Li_2Al_4O_7$ was observed at $1100^{\circ}C$. The origin of the green-light emission is discussed in relation to the crystalline phase change.

Keywords

References

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