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J. Korean Ceram. Soc. > Volume 38(9); 2001 > Article
Journal of the Korean Ceramic Society 2001;38(9): 806.
$Al^{3+}$, $Pr^{3+}$가 첨가된 Perovskite $La_{2/3}TiO_{3}와 Pyrochlore $La_{2}Ti_{2}O_{7}$의 발광 특성
박상미, 박정규1, 김창해1, 박희동1, 장호겸
고려대학교 화학과
1한국화학연구원 화학소재부
Photoluminescence Behavior of $Al^{3+}$, $Pr^{3+}$ Doped Perovskite-type $La_{2/3}TiO_{3}and Pyrochlore-type $La_{2}Ti_{2}O_{7}$
Sang-Mi Park, Joung-Kyu Park1, Chang-Hae Kim1, Hee-Dong Park1, Ho-Gyeom Jang
Chemistry, Korea University
1Advanced Materials Division, Korea Research Institute of Chemical Technology
ABSTRACT
$La_{2/3}TiO_3$, $La_2Ti_2O_7$ are used in various parts by dielectric properties. The purpose of the present study is to understand the photoluminescence properties of $Al^{3+};and;Pr^{3+}$ doped perovskite-type $La_{2/3}TiO_3$ and pyrochlore-type $La_2Ti_2O_7$ phosphor, which characterized by the red emission $(^1D_2{rightarrow}^3H_4);of;Pr^{3+}$ of $Pr^{3+}$ ion. The explanation for the energy transfer and the corresponding critical distance were proposed on the role of Al^3+ ions as energy transfer mediates in perovskite-type $La_{2/3}TiO_3$:Pr phosphor. In order to clarify the distinction of photoluminescence propoerties between the perovskite-type $La_{2/3}TiO_3$ and the pyrochlore $La_2Ti_2O_7$, the trap-involved process and the charge transfer band have been investigated.
Key words: $La_{2/3}TiO_{3}, $La_{2}Ti_{2}O_{7}$, Charge transfer, Trap-Involved process, Sensitizer
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