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Hydrothermal Synthesis and Luminescence Properties of Novel Red Y 1− x Eu x W 2 O 6 (OH) 3 Phosphors
Author(s) -
Pu XiPeng,
Shao Xin,
Zhang DaFeng,
Yi XiuJie,
Jia LiPing
Publication year - 2010
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.1551-2916.2010.03828.x
Subject(s) - phosphor , monoclinic crystal system , hydrothermal circulation , luminescence , analytical chemistry (journal) , impurity , hydrothermal synthesis , materials science , doping , emission intensity , emission spectrum , powder diffraction , crystallography , mineralogy , crystal structure , chemistry , spectral line , physics , optoelectronics , organic chemistry , chromatography , astronomy , seismology , geology
Novel red Y 1− x Eu x W 2 O 6 (OH) 3 phosphors ( x =0, 0.2, 0.4, 0.6, 0.8, 1) were synthesized via a facile hydrothermal method at 180°C for 24 h. The results of X‐ray powder diffraction patterns indicate that as‐synthesized phosphors have a monoclinic structure without any impurity phase. The microstructure characterization shows that the Eu 3+ content has a remarkable influence on the morphologies of as‐obtained samples. With the increasing Eu 3+ content, the sample morphology tends to be spherical. The emission spectra under 394 nm excitation exhibit dominant peaks centered at 617 nm, corresponding to the 5 D 0 → 7 F 2 transition of Eu 3+ . The high ratio of the red emission at 617 nm to the orange emission at 593 nm makes Y 1− x Eu x W 2 O 6 (OH) 3 phosphors a potential candidate for red‐emitting light‐emitting diode phosphors. The emission intensity of the phosphors increases with Eu 3+ doping concentration. The 5 D 0 → 7 F 2 emission intensity of EuW 2 O 6 (OH) 3 is about 3.5 times stronger than that of Y 0.8 Eu 0.2 W 2 O 6 (OH) 3 . Furthermore, the life time were discussed.