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

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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The Luminescent Mechnism and Cathodoluminescence of $CaTiO_3$:Pr Synthesized with CaO and $TiO_2$ Powders

CaO와 $TiO_2$분말로 합성된 $CaTiO_3$:Pr형광체의 발광구조 해석과 음극선 발광특성

  • 박용규 (전자부품종합기술연구소) ;
  • 한정인 (전자부품종합기술연구소) ;
  • 곽민기 (전자부품종합기술연구소) ;
  • 이인규 (전자부품종합기술연구소) ;
  • 김대현 (한국한공대학교 재료공학과)
  • Published : 1998.08.01
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Abstract

In this present study, the luminescence characteristics and mechanism of energy $CaTiO_3$:Pr phosphor were studied using disk specimens sintered at various temperatures and envirenment. A single-phase $CaTiO_3$:Pr was synthesized by sintering above 140$0^{\circ}C$ and its crystal structure was found to be perovskite orthorhombic. A dominant peak around 360 nm and a broad peak around 395 nm were observed in the PLE(Photoluminescence Excitation) spectrum of $CaTiO_3$:Pr with fixed emission wavelength at 612 nm, the decay time of 360 nm excitation was found to be longer than that of 395 nm excitation. From this result, it is assumed that the free carrier excited to 360 nm is transferred to 395 nm energy level. Therefore, the decrease in 395 nm intensity observed in CaTiO$_3$:Pr specimens sintered in Ar gas environment induced shorter decay time and improved CL luminescence.

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References

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