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HomeKey Engineering MaterialsKey Engineering Materials Vols. 512-515Effects of Sm3+ Doping on the Photoluminescence...

Effects of Sm³⁺ Doping on the Photoluminescence Properties of Ca₉Eu_1-xSm_x(VO₄)₇ Red-Emitting Phosphors

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Abstract:

This paper reports the photoluminescence properties of Ca9Eu1-xSmx(VO4)7 (x=0.2-0.4) synthesized at 1250 oC in air for 12 h using traditional solid-state reaction method. With the increase of Sm3+ substitution amount, purity Ca9Eu1-xSmx(VO4)7 phase was obtained even when the Eu3+ ions were totally substituted by Sm3+. The experimental results showed that when Sm3+ was codoped with Eu3+ into Ca9Eu1-xSmx(VO4)7 crystal structure, Sm3+ would act as a sensitizer and transfer the excitation energy to Eu3+ ions and finally enhance the emission intensity of Ca9Eu1-xSmx(VO4)7 under 405 nm excitation, which leads to more favorite of this kind of phosphor used in UV LED based white LEDs.

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High-Performance Ceramics VII

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Periodical:

Key Engineering Materials (Volumes 512-515)

Pages:

1488-1493

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.512-515.1488

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Online since:

June 2012

Authors:

Li Hong Liu, Rong Jun Xie, Xu Dong Sun, Qing Huang, Naoto Hirosaki

Keywords:

Phosphor, Red-Emitting, Sensitizer, Vanadate

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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