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Citation: Wu Hong-Ying, Wang Xi-Gui, Xie Da-Tao, Weng Shi-Fu, Wu Jin-Guang. Structure and Luminescence Properties of Tb-doped Sibased Light-emitting[J]. Acta Physico-Chimica Sinica, ;2001, 17(01): 53-58. doi: 10.3866/PKU.WHXB20010111 shu

Structure and Luminescence Properties of Tb-doped Sibased Light-emitting

1.
Department of Chemistry,Inner Mon lia Normal University,Huhehot　010022;College of Chemistry and Molecular Engineering,Peking University,State Key Laboratory of Rare Earth Materials Chemistry and Application,Beijing　100871

Received Date: 7 June 2000
Available Online: 15 January 2001

Tb3＋ ions were incorporated in SiO2 glasses using a solgel process with appropriate heat treatment.Glasses incorporated with Tb3＋ showed emission peaks at 488,544,585,and 620 nm,respectively,exhibiting,respectively,5D4—7FJ(J=3,4,5,6) transition of the Tb3＋ ions.The structural evolution during the transition from gel to glass of Tb3＋ doped SiO2 glasses and the effect on luminescence properties were studied by excitation spectra,emission spectra,IR,farIR and DTATG at differential heat treatment conditions.The results show that most of absorbed water molecules in gel were removed during heat treatment at 50～100 ℃,conversion from gel to glasses was the main structural changes when gel was heattreated in the range 150～500 ℃,and the luminescence intensity increased remarkably also,becoming stable structure at 800 ℃.This observation leads to a conclusion that the radiation electronic transitions of Tb3＋ were quenched strongly by O－H group and were enhanced by temperature elevation.
- Sol-gel method;Tb-doped silica glasses;Luminescence properties
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