Far-Red-Emitting BiOCl:Eu^sup 3+^ Phosphor with Excellent Broadband NUV-Excitation for White-Light-Emitting Diodes

Rare-earth ion-doped semiconducting phosphor has attracted extensive attention due to the ability to achieve efficient luminescence through the host sensitization. Here, we present a new type red-emitting Eu3+ -doped BiOCl phosphors possessing a broad excitation band in the near-ultraviolet (NUV) re...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2015-07, Vol.98 (7), p.2170
Main Authors: Li, Yongjin, Zhao, Zongyan, Song, Zhiguo, Wan, Ronghua, Qiu, Jianbei, Yang, Zhengwen, Yin, Zhaoyi, Liu, Xuee, Liu, Qun, Zhou, Yuting
Format: Article
Language:English
Subjects:
Band gap
Ceramics
Crystals
Light emitting diodes
Luminescence
Semiconductor doping
Ultraviolet radiation
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Summary:Rare-earth ion-doped semiconducting phosphor has attracted extensive attention due to the ability to achieve efficient luminescence through the host sensitization. Here, we present a new type red-emitting Eu3+ -doped BiOCl phosphors possessing a broad excitation band in the near-ultraviolet (NUV) region. Experimental measurements and theoretical calculations confirm that Eu3+ ion dopants result in forming impurity energy level near valence band, and the excellent broadband NUV-exciting ability of Eu3+ ion is due to the electronic transitions of BiOCl band gap. Moreover, the highest emission intensity of the phosphors is from the 5D0 ... 7F4 transition of Eu3+ around 699 nm (far-red) through whether host excitation or direct Eu3+ ions excitation, which lie in the particular structure of BiOCl crystals. Our results indicate that the Eu3+ -doped BiOCl crystals show great potential as red phosphors for white-light-emitting diodes. (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:0002-7820
1551-2916