$Tb^{3+}$ 첨가된 $YAlO_3$에서 Cross-Relaxation의한 발광 색변화

Variation of Emission Colors through Cross-Relaxation In $Tb^{3+}$ Doped $YAlO_3$

  • 김광철 (한국기술교육대학교 교양학부 물리학전공)
  • Kim, Gwang Chul (Physics Department, School of Liberal Arts, Korea University of Technology and Education)
  • 투고 : 2012.02.17
  • 심사 : 2012.03.15
  • 발행 : 2012.03.31

초록

$YAlO_3:Tb{_x}^{3+}$ has been synthesized by a combustion process and the concentration x of Tb was varied from 0.001 and 0.05 mol% per mole of $YAlO_3$. The emission optical properties on the $YAlO_3:Tb{_x}^{3+}$ have been investigated by time-resolved photoluminescence spectra and decay curves of center wavelength. The emission color changes from blue to green with increasing the $Tb^{3+}$ concentration from x= 0.001 to 0.05 mole fraction in $YAlO_3$ host. This emission color change can be explained in terms of cross-relaxation processes. Decay curves of emission intensity indicate that the type of energy transfer is donor-acceptor transition.

키워드

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