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Luminescent properties of MAl(SO 4 ) 2 Br:Eu 3+ (M = Sr or Mg) red phosphors for near‐UV light‐emitting diodes
Author(s) -
Deshmukh Priti B.,
Puppalwar S. P.,
Dhoble N. S.,
Dhoble S. J.
Publication year - 2015
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.2686
Subject(s) - phosphor , photoluminescence , luminescence , magnetic dipole transition , electric dipole transition , microcrystalline , materials science , analytical chemistry (journal) , doping , excited state , light emitting diode , powder diffraction , chemistry , optoelectronics , dipole , crystallography , magnetic dipole , physics , organic chemistry , chromatography , nuclear physics
Abstract Eu 3+ ‐activated MAl(SO 4 ) 2 Br phosphors (where M = Mg or Sr) are successfully prepared using a wet chemical reaction technique. The samples are characterized by X‐ray diffraction (XRD) and photoluminescence (PL) spectroscopies. The XRD pattern revealed that both the samples are microcrystalline in nature. PL of Eu 3+ ‐doped SrAl(SO 4 ) 2 Br and MgAl(SO 4 ) 2 Br phosphors exhibited characteristic red emission coming from the 5 D 0 → 7 F 2 (616 nm) electron transition, when excited by 396 nm wavelength of light. The maximum intensity of luminescence was observed at a concentration of 1 mol% Eu 3+ . The intensity of the electric dipole transition at 616 nm is greater than that of the magnetic dipole transition at 594 nm. The results showed that MAl(SO 4 ) 2 Br:Eu 3+ , (M = Mg, Sr) phosphors have potential application in near‐UV light‐emitting diodes as efficient red‐emitting phosphor. Copyright © 2014 John Wiley & Sons, Ltd.