Journal of the Semiconductor & Display Technology (반도체디스플레이기술학회지)

The Korean Society Of Semiconductor & Display Technology (한국반도체디스플레이기술학회)
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Synthesis of Lu3Al5O12:Ce3+ Nano Phosphor by Coprecipitation Method, and Their Optical Properties

공침법을 이용한 Lu3Al5O12:Ce3+ 나노 형광체 합성과 광학적 특성 분석

  • Kang, Taewook (Interdisciplinary Program of LED and Solid State Lighting Engineering, Pukyong National University) ;
  • Kang, Hyeonwoo (Department of Display Engineering, Pukyong National University) ;
  • Kim, Jongsu (Department of Display Engineering, Pukyong National University) ;
  • Kim, Gwangchul (Physic Department, School of Liberal Arts, KOREA TECH)
  • 강태욱 (부경대학교 LED공학협동과정) ;
  • 강현우 (부경대학교 융합디스플레이공학과) ;
  • 김종수 (부경대학교 융합디스플레이공학과) ;
  • 김광철 (한국기술교육대학교 교양학부 물리학전공)
  • Received : 2019.11.22
  • Accepted : 2019.12.12
  • Published : 2019.12.31
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Abstract

LuAG:Ce(Lu3Al5O12:Ce3+) nano phosphor were synthesized by applying the coprecipitation method. It is used to increase the color rendering of phosphor ceramic plate for high power LEDs and laser lighting. Internal quantum efficiency and absorption of LuAG:Ce nano phosphor are 51.5 % and 64.4 %, respectively, which is higher than the previously studied nano phosphors. The maximum absorption wavelength of this phosphor is 450 nm blue light, and the emission wavelength is 510 nm. The emission wavelength shifted to longer wavelength when the concentration of Ce increased in the heat treatment of the reducing atmosphere. Thermal quenching of LuAG nano phosphor was 70 % at 200 ℃, it was explained by their significant quenching of all raman scattering modes, implying the restriction of electron-phonon couplings caused by their defects.

Keywords

References

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