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A Potential Red Phosphor Na 0.5 Gd 0.5 MoO 4 :Eu 3+ For Light‐Emitting Diode Application
Author(s) -
Zhou Liya,
Yi Linghong,
Sun Ruifang,
Gong Fuzhong,
Sun Jianhua
Publication year - 2008
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2008.02598.x
Subject(s) - phosphor , chromaticity , photoluminescence , electric dipole transition , tetragonal crystal system , analytical chemistry (journal) , light emitting diode , luminescence , materials science , chemistry , crystal structure , dipole , optoelectronics , crystallography , optics , physics , magnetic dipole , organic chemistry , chromatography
The intense red‐emitting phosphor Na 0.5 Gd 0.5 MoO 4 :Eu 3+ with tetragonal structure was prepared by solid‐state reaction and its photoluminescence properties were investigated. Compared with Y 2 O 2 S:0.05Eu 3+ , the obtained Na 0.5 Gd 0.375 MoO 4 :Eu 0.125 3+ phosphor shows a stronger excitation band near 400 nm as well as enhanced red emissions. The strong red‐emission lines at 616 nm correspond to the forced electric dipole 5 D 0 → 7 F 2 transitions on Eu 3+ . The chromaticity coordinates of Na 0.5 Gd 0.375 MoO 4 :Eu 0.125 3+ ( x =0.652, y =0.348) are closer to the standard of National Television Standard Committee values ( x =0.670, y =0.330) than that of Y 2 O 2 S:0.05Eu 3+ ( x =0.645, y =0.354). The optical properties suggest that Na 0.5 Gd 0.375 MoO 4 :Eu 0.125 3+ is an efficient red‐emitting phosphor for light‐emitting diode applications.