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Sol–gel preparation and luminescent properties of red‐emitting phosphor Sr‐Ba‐Mo‐W‐O‐(Eu 3+ ,Sm 3+ )
Author(s) -
Li Fei,
Xie Huidong,
Xi Haihong,
Wang Xiaochang
Publication year - 2016
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.2948
Subject(s) - phosphor , luminescence , analytical chemistry (journal) , raman spectroscopy , materials science , doping , sol gel , mineralogy , chemistry , optics , nanotechnology , optoelectronics , physics , chromatography
Two series of red‐emitting phosphors Sr‐Ba‐Mo‐W‐O:Eu,Sm and Sr‐Ba‐Mo‐W‐O:Eu have been synthesized by a sol–gel method. The effects of the chemical composition, concentrations of Sm 3+ and Eu 3+ , the Sr 2+ /Ba 2+ ratio, and the W 6+ /Mo 6+ ratio on the luminescent properties were investigated. The as‐prepared phosphors were characterized by X‐ray diffraction and Raman spectra. Results showed that single phases of the two series were prepared. The compositions of Sr 0.6 Ba 0.13 Mo 0.8 W 0.2 O 4 :Eu 0.10 Sm 0.08 and Sr 0.75 Ba 0.1 Mo 0.8 W 0.2 O 4 :Eu 0.10 had the strongest luminescent intensity. The excitation spectra of Sm 3+ , Eu 3+ co‐doped phosphors were broader and the strongest peak moved to 404 nm when compared with that of Eu 3+ single‐doped phosphors. The luminescent intensity of the Sr 0.6 Ba 0.13 Mo 0.8 W 0.2 O 4 :Eu 0.10 Sm 0.08 at 618 nm were 2.8 times greater than that of Sr 0.75 Ba 0.1 Mo 0.8 W 0.2 O 4 :Eu 0.10 . The luminescent intensity of Sr 0.6 Ba 0.13 Mo 0.8 W 0.2 O 4 :Eu 0.10 Sm 0.08 and Sr 0.75 Ba 0.1 Mo 0.8 W 0.2 O 4 :Eu 0.10 at 150 °C decreased to 56.8% and 50.3% of the initial value at room temperature, respectively. Copyright © 2015 John Wiley & Sons, Ltd.