Document Detail

Blue luminescence and structural properties of Ce(3+)-activated phosphosilicate apatite Sr(5)(PO(4))(2)(SiO(4)).
MedLine Citation:
PMID:  23187727     Owner:  NLM     Status:  Publisher    
Blue-emitting phosphors of the Ce(3+)-activated phosphosilicate Sr(5)(PO(4))(2)SiO(4) with an apatite structure were prepared via a conventional solid-state reaction method. The X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL) spectra, time-resolved luminescence, thermal quenching and luminescence decay curves (lifetimes) were applied to characterize the phosphors. The effects of the Ce(3+) activator concentration on the phase evolution and luminescence properties were investigated. Sr(5-5x)Ce(5x)(PO(4))(2)SiO(4) (x = 0.03) exhibits the brightest blue emission with CIE coordinates of (x = 0.185, y = 0.165) and a quantum efficiency of 46%. The crystallographic site of the Ce(3+) ions in the Sr(5)(PO(4))(2)SiO(4) lattice was identified and discussed. There is only one distinguishable crystallographic Ce(3+) site occupied on a Sr(ii) site in the Sr(5)(PO(4))(2)SiO(4) lattices, which results in a typical doublet emission band. The wavelengths of the excitation and emission bands show a red shift with increasing Ce(3+) doping concentration. The luminescence features of the Ce(3+) ions were discussed on the base of the crystal structure. The thermal stability of the blue-emitting phosphors was evaluated by the temperature-dependent luminescence and the activation energy of the thermal quenching.
Zhengxu Tao; Yanlin Huang; Hyo Jin Seo
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-28
Journal Detail:
Title:  Dalton transactions (Cambridge, England : 2003)     Volume:  -     ISSN:  1477-9234     ISO Abbreviation:  Dalton Trans     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101176026     Medline TA:  Dalton Trans     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
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