Crystal Structure and Luminescence Properties of Y2O3-Nb2O5-B2O3:Eu3+,Bi3+ Phosphors

Chem. J. Chinese Universities ›› 1994, Vol. 15 ›› Issue (9): 1276.

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Crystal Structure and Luminescence Properties of Y₂O₃-Nb₂O₅-B₂O₃:Eu³⁺,Bi³⁺ Phosphors

ZHANg Jing-Jun¹, ZHOU Shi-Hong¹, SU Qiang¹, FAN Sheng-Chun²

1. Changchun Institute of Applied Chemitry, Academia Sinica, Changchun 130022;
2. Department of Chemistry, Nanchang University

Received:1993-10-27 Revised:1994-04-20 Online:1994-09-24 Published:1994-09-24

Abstract

Abstract: In this paper, Y₂O₃-Nb₂O₅-B₂O₃(2), Y_0.93Eu_0.07)₂O₃-Nb₂O₅·B₂O₃(4) and(Y_0.91Eu_0.07 Bi_0.02)₂O₃-Nb₂O₅-B₂O₃(5)phosphors were prepared by usual solid state reaction at 1200℃. The luminescence properties of these samples with fergusonite structure are reported and discussed. Under 268 nm excitation, Y₂O₃-Nb₂O₅-B₂O₃(2)shows much brighter blueviolet luminescence due to 1T1-1A1 level transition of NbO₄ group with a maximum at 410 nm.The B₂O₃ in the system can reduce the reaction temperature and increase the emission intensity of NbO₄ group and Eu³⁺.The energy transfer from NbO₄ to Eu³⁺and from Bi³⁺to Eu³⁺is observed in(Y_0.91Eu_0.07Bi_0.02)₂O₃-Nb₂O₅-B₂O₃(5)phosphor, so that the red emission of Eu³⁺ is enhanced sensibly.

Key words: Europium, Bismuth, Luminescence, Niobate, Energy transfer

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ZHANg Jing-Jun, ZHOU Shi-Hong, SU Qiang, FAN Sheng-Chun. Crystal Structure and Luminescence Properties of Y₂O₃-Nb₂O₅-B₂O₃:Eu³⁺,Bi³⁺ Phosphors[J]. Chem. J. Chinese Universities, 1994, 15(9): 1276.

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Crystal Structure and Luminescence Properties of Y₂O₃-Nb₂O₅-B₂O₃:Eu³⁺,Bi³⁺ Phosphors

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