Bi와 Eu이 도핑된 yttrium oxide의 white LED용 적색 형광체 발광 특성

Luminescence characteristics of bismuth and europium co-doped yttrium oxide red phosphor for white light emitting diodes

  • 박우정 (성균관대학교 신소재공학과) ;
  • 정몽권 (성균관대학교 신소재공학과) ;
  • 윤석규 (성균관대학교 신소재공학과) ;
  • 윤대호 (성균관대학교 신소재공학과, 성균 나노과학 기술원)
  • Park, W.J. (Department of Advanced Materials Engineering, Sungkyunkwan University) ;
  • Jung, M.K. (Department of Advanced Materials Engineering, Sungkyunkwan University) ;
  • Yoon, S.G. (Department of Advanced Materials Engineering, Sungkyunkwan University) ;
  • Yoon, D.H. (Department of Advanced Materials Engineering, Sungkyunkwan University, Department of Advanced Materials Engineering & Sungkyunkwan Advanced Institute of Nanotechnology, Sungkyunkwan University)
  • 발행 : 2006.06.30

초록

본 연구에서는 장파장 UV 영역하에서 비교적 우수한 발광강도를 가지는 적색 형광체를 얻기 위하여 고상법으로 합성하여 발광특성을 관찰하였다. 발광 피크는 581, 587, 593nm의 약한 발광 peak과 611 nm의 최대 peak을 관찰 할 수 있는데 이들 중 581, 587, 593nm의 peak들은 $^5D_0{\rightarrow}^7F_1$로의 전자천이에 기인하는 발광 peak들이며, 611 nm의 최대 발광 peak과 630nm의 약한 peak은 $^5D_0{\rightarrow}^7F_2$로의 전자 천이에 기인하는 발광 peak들이다. 또한 합성된 적색 형광체는 $310{\sim}390nm$의 broad한 흡수피크를 나타낸다. 또한 융제를 0.43mo1% $H_3BO_3$와 2.08mo1% $BaCl_2{\cdot}2H_2O$를 첨가한 입자 크기는 $700{\sim}800nm$로 매우 균일하게 성장되었다.

The red emission properties of $Bi^{3+}$ co-doped $Y_2O_3:Eu^{3+}$ prepared by the solid-state reaction was investigated, in order to verify its potential to act as the red emitting phosphor of white LEDs. The emission spectrum consisted of a weak band at 581, 587, 5931 and 599 nm, with maximum sharp peaks occurring at about 611 nm due to the $^5D_0{\rightarrow}^7F_2$ transition of $Eu^{3+}$, while the excitation spectrum exhibited a broad band between 290 and 430 mm with peaks occurring in the range of $310{\sim}390nm$. Also, SEM image of the sample containing 0.43 mol% $H_3BO_3$ and 2.08 mol% $BaCl_2{\cdot}2H_2O$ phosphor particles grew to achieve diameters of $700{\sim}800nm$.

키워드

참고문헌

  1. C.H. Hong, 'The latest research trend of white - emitting LEDs for semiconductor illumination', KlEEME 14(11) (2001) 25
  2. S.J. Hong, 'White-light development technology trend', Bull. of the KIEEME 14(11) (2001) 20
  3. M. Schoichi, 'Light emitting diode display', Electronic Display (1998) 199
  4. J.M. Lee, J.G Yoo, D.H. Park and K.S. Sohn, 'A search for red phosphors using genetic algorithm and combinatorial chemistry', J. Korean Ceram. Soc. 40(12) (2003) 1170 https://doi.org/10.4191/KCERS.2003.40.12.1170
  5. S. Qiang, C. Barthou, J.P. DENIS, F. Pelle and B. Blanzat, 'Luminescence and energy transfer in $Y_{2}O_{2}$ codoped with $Bi^{3+}\;and\'Eu^{3+}$' , J. Lumin. 28 (1983) 1 https://doi.org/10.1016/0022-2313(83)90021-2
  6. S.M. Kim, S.H. Gee, J.I. Goo and T.O. Kim, 'The luminescence properties of YAG ; $Tb^{3+}$ phosphor prepared by hydrothermal synthesis', J. Korean Ceram. Soc. 37(8) (2000) 745
  7. S. Shinoya, et aI., Phosphor Handbook, CRC Press, New York (1999)
  8. H.W. Leverenz, 'An introduction to luminescent of solids', Dover, New York (1968) 333
  9. M. Kottaisamy, R. Jagannathan, R.P. Rao, M. Avudaithai, L.K. Srinivasan and Sundaram, 'On the formation of flux grown $Y_{2}O_{3}S$ : $Eu^{3+}$ red phosphor', J. Electrochem. Soc. 142(9) (1995) 3205 https://doi.org/10.1149/1.2048714