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Novel red phosphor of Eu 3+ , Bi 3+ coactivated double tungstates
Author(s) -
Wang Zhengliang,
Liang Hongbin,
Wang Qin,
Chen Minghong,
Gong Menglian,
Su Qiang
Publication year - 2009
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200824351
Subject(s) - phosphor , chromaticity , tungstate , excitation , photoluminescence , luminescence , quenching (fluorescence) , analytical chemistry (journal) , molybdate , ion , light emitting diode , materials science , europium , chemistry , optoelectronics , fluorescence , physics , optics , inorganic chemistry , organic chemistry , chromatography , quantum mechanics
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)