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Luminescence and spectroscopic studies of halosulfate phosphors: a review
Author(s) -
Gedam S. C.,
Thakre P. 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.2712
Subject(s) - phosphor , photoluminescence , doping , analytical chemistry (journal) , ion , energy transfer , luminescence , materials science , chemistry , nuclear chemistry , optoelectronics , organic chemistry , chromatography , molecular physics
This review discusses the photoluminescence (PL) characteristics of halosulfate phosphors developed by us. Halosulfate phosphors KCaSO 4 Cl:X,Y (X = Eu or Ce; Y = Dy or Mn) and Na 6 (SO 4 ) 2 FCl (doped with Dy, Ce or Eu) were prepared using a solid‐state diffusion method. The mechanism of energy transfer from Eu 2+ →Dy 3+ , Ce 3+ →Dy 3+ and Ce 3+ →Mn 2+ has also been studied. Dy 3+ emission in the host at 475 and 570 nm is observed due to 4 F 9/2 → 6 H 15/2 and 4 F 9/2 → 6 H 13/2 transition, whereas the PL emission spectra of Na 6 (SO 4 ) 2 FCl:Ce phosphor shows Ce 3+ emission at 322 nm due to 5d→4f transition of the Ce 3+ ion. The main property of KCaSO 4 Cl is its very high sensitivity, particularly when doped by Dy, Mn or Pb activators. This review also discusses the PL characteristics of some new phosphors such as LiMgSO 4 F, Na 6 Pb 4 (SO 4 ) 6 Cl 2 , Na 21 Mg(SO 4 ) 10 Cl 3 and Na 15 (SO 4 ) 5 F 4 Cl. Copyright © 2014 John Wiley & Sons, Ltd.