✦ LIBER ✦

Novel red phosphor of Eu3+, Bi3+coactivated double tungstates

✍ Scribed by Wang, Zhengliang ;Liang, Hongbin ;Wang, Qin ;Chen, Minghong ;Gong, Menglian ;Su, Qiang

Publisher: John Wiley and Sons
Year: 2009
Tongue: English
Weight: 339 KB
Volume: 206
Category: Article
ISSN: 0031-8965
DOI: 10.1002/pssa.200824351

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✦ Synopsis

Abstract

Eu^3+^, Bi^3+^ coactivated double‐tungstate phosphors were prepared by the solid‐state reaction technique, and their photoluminescent properties were investigated. No concentration quenching of Eu^3+^ was observed in the series samples of NaLa~1–x~ (WO~4~)~2~:x Eu^3+^. With the introducing of Bi^3+^ions, the intensities of the excitation and emission of these phosphors were increased. The phosphor NaEu~0.70~(WO~4~)~2~:0.30Bi^3+^ showed a broadened excitation band around 400 nm and intensely red emissions under ∼400 nm light excitation, with the CIE chromaticity coordinates (x = 0.66, y = 0.34). Hence, the novel phosphor NaEu~0.70~(WO~4~)~2~:0.30Bi^3+^ may find application in the fabrication of near‐UV InGaN‐based LEDs. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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