The Photoluminescent Properties of ZnAl$_2$O$_4$ Phosphors

ZnAl$_2$O$_4$ 형광체의 광발광 특성

  • 강병모 (전남대학교 공대 전자공학과) ;
  • 정운조 (한려산업대학교 정보통신학과) ;
  • 조재절 (초당산업대학교 전자공학과) ;
  • 송호준 (기초과학 지원연구소) ;
  • 박계춘 (목포대학교 공대 전기공학과) ;
  • 유용택 (전남대학교 공대 전자공학과)
  • Published : 1997.11.01

Abstract

ZnO and A1$_2$O$_3$ powders were mixed in 1 : 1 mole ratio and ball-milled with ethanol for 3 h. After the pressing process, the mixtures were sintered at $700^{\circ}C$~130$0^{\circ}C$ for 5 h in air to form ZnA1$_2$O$_4$. Structural properties were analyzed by X-ray diffraction patterns ; optical properties by absorption spectra with UV-VIS-H[R Spectrophotometer ; microstructural properties by SEM ; photoluminescent properties by using PL Measuring System. In result, ZnAl$_2$O$_4$ phosphor is crystallized at 110$0^{\circ}C$ and optical bandgap is calculated at 4.65 eV. PL spectrums were shifted to longer wavelengths with increasing temperature and was appeared around 780nm at 130$0^{\circ}C$ . Additionally, the peak intensity was veil strong at 80$0^{\circ}C$ and was declined with increasing temperature.

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