We prepared Y3Al5O12;Ce3+,Pr3+ transparent ceramic phosphor using a solid state reaction method. By XRD pattern analysis and SEM measurement, our phosphors reveal an Ia-3d(230) space group of cubic structure, and the transparent ceramic phosphor has a polycrystal state with some internal cracks and pores. In the Raman scattering measurement with an increasing temperature, lattice vibrations of the transparent ceramic phosphor decrease due to its more perfect crystal structure and symmetry. Thus, low phonon generation is possible at high temperature. Optical properties of the transparent ceramic phosphor have broader excitation spectra due to a large internal reflection. There is a wide emission band from the green to yellow region, and the red color emission between 610 nm and 640 nm is also observed. The red-yellow phosphor optical characteristics enable a high Color Rendering Index (CRI) in combination with blue emitting LED or LD. Due to its good thermal properties of low phonon generation at high temperature and a wide emission range for high CRI characteristics, the transparent ceramic phosphor is shown to be a good candidate for high power solid state white lighting.

Abstracts
 1. 서 론
 2. 실험 방법
  2.1 YAG:Ce,Pr 투명 세라믹 형광체 제작
  2.2 측정방법 및 사용기기
 3. 결과 및 고찰
  3.1 구조적 특성
  3.2 광학적 특성
 4. 결 론
 References

• 강태욱(부경대학교 LED 공학협동과정) | Taewook Kang (Interdisciplinary Program of LED and Solid State Light Engineering, Pukyong National University)
• 임석규(부경대학교 융합디스플레이공학과) | Seokgyu Lim (Dept. of Display Science and Engineering, Pukyong National University)
• 김종수(부경대학교 융합디스플레이공학과, 부경대학교 LED 공학협동과정) | Jongsu Kim (Dept. of Display Science and Engineering, Pukyong National University, Interdisciplinary Program of LED and Solid State Light Engineering, Pukyong National University)
• 정용석(부경대학교 융합디스플레이공학과) | Yongseok Jeong (Dept. of Display Science and Engineering, Pukyong National University) Corresponding author