반도체디스플레이기술학회지 (Journal of the Semiconductor & Display Technology)

한국반도체디스플레이기술학회 (The Korean Society Of Semiconductor & Display Technology)
권호 표지

CaYAlO4:Tb3+/Eu3+/Ce3+형광체의 광학적 특성 분석

Optical Properties of CaYAlO4:Tb3+/Eu3+/Ce3+ Phosphors

  • 강태욱 (부경대학교 LED공학협동과정) ;
  • 류종호 (부경대학교 융합디스플레이공학과) ;
  • 김종수 (부경대학교 융합디스플레이공학과) ;
  • 김광철 (한국기술교육대학교 교양학부 물리학전공)
  • Kang, Taewook (Interdisciplinary Program of LED and Solid State Lighting Engineering, Pukyong National University) ;
  • Ryu, Jongho (Department of Display Engineering, Pukyong National University) ;
  • Kim, Jongsu (Department of Display Engineering, Pukyong National University) ;
  • Kim, Gwang Chul (Physic Department, School of Liberal Arts, KOREATECH)
  • 투고 : 2017.12.21
  • 심사 : 2017.12.26
  • 발행 : 2017.12.31
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초록

$Tb^{3+}$ or $Eu^{3+}$ or $Ce^{3+}$-doped $CaYAlO_4$ phosphor were synthesized by solid-state method. $CaYAlO_4:Tb^{3+}$ is shown that the $Tb^{3+}$-doping concentration has a significant effect on the $^5D_4/^5D_3{\rightarrow}7F_J$ (J=6,...,0) emission intensity of $Tb^{3+}$. The $CaYAlO_4:Tb^{3+}$ phosphors show tunable photoluminescence from blue to yellow with the change of doping concentration of $Tb^{3+}$ ions. The $CaYAlO_4:Eu^{3+}$ phosphors exhibit a red-orange emission of $Eu^{3+}$ corresponding to $^5D_0$, $_{1,2}{\rightarrow}^7F_J$ (J=4,...,0) transitions. The $CaYAlO_4:Ce^{3+}$ phosphors show a blue emission due to $Ce^{3+}$ ions transitions from the 5d excited state to the $^2F_{5/2}$ and $^2F_{7/2}$ ground states. The decay time of $CaYAlO_4:Tb^{3+}$ phosphors decrease from 1.33 ms to 0.97 ms as $Tb^{3+}$ concentration increases from 0.1 mol% to 7 mol%. The decay time of $CaYAlO_4:Eu^{3+}$ phosphors increase from 0.94 ms to 1.17 ms as $Eu^{3+}$ concentration increases from 1 mol% to 9 mol%.

키워드

참고문헌

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