Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effect of La3＋ and Ce3＋ Ions on Photoluminescence Behavior of YBO3: Tb Phosphors

YBO3: Tb 형광체의 광특성에 대한 La3＋ 및 Ce3＋ 이온의 영향

  • On, Ji-Won (Department of Chemistry, School of Advanced Sciences, Dankook University) ;
  • Lee, Jeong-Baek (Department of Chemistry, School of Advanced Sciences, Dankook University) ;
  • Kim, You-hyuk (Department of Chemistry, School of Advanced Sciences, Dankook University)
  • 온지원 (단국대학교 첨단과학부) ;
  • 이정백 (단국대학교 첨단과학부) ;
  • 김유혁 (단국대학교 첨단과학부)
  • Published : 2003.08.01
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Abstract

In the present investigation, $La^{3＋}$ and $Ce^{V}$ ions were substituted for $Y^{3＋}$ in the $YBO_3$: Tb in various concentrations. It has been found that these phosphors form solid solutions within limited concentration ranges Excitation and emission spectra under 254 nm and 147 nm were investigated for these phosphors to evaluate influences of $La^{3＋}$ and $Ce^{3＋}$ ions on brightness and CIE color coordinates. It has been observed that brightness of $(Y, La)BO_3$: Tb under 254 nm and 147 nm when $La^{3＋}$ ions are added show an increase of 2.7 times and 1.25 times, respectively. On the other hand, emission intensities of peaks in $Y_{0.8-x}$ $BO_3$: $Tb_{0.2}$ , $Ce_{x}$ show continuos decrease as $Ce^{3＋}$ / content is increased from 0 to 0.4. CIE color coordinates of prepared phosphors show yellowish green which is needed to be improved to be used for display applications.

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