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Luminescence characteristics of Na 3 Ca 2 (SO 4 ) 3 F: Ce 3+ fluoride material
Author(s) -
Nikhare G. N.,
Gedam S. C.,
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.2790
Subject(s) - thermoluminescence , phosphor , analytical chemistry (journal) , photoluminescence , dopant , luminescence , excited state , trapping , materials science , wavelength , doping , chemistry , atomic physics , optoelectronics , physics , ecology , chromatography , biology
A new Na 3 Ca 2 (SO 4 ) 3 F: Ce 3+ phosphor synthesized by a solid state diffusion method is reported. The photoluminescence study showed a single high intensity emission peak at 307 nm wavelength when excited by UV light of wavelength 278 nm. An unresolved peak of comparatively less intensity was also observed at 357 nm along with the main peak. The characteristic emission of dopant Ce in Na 3 Ca 2 (SO 4 ) 3 F phosphor clearly indicated that it resides in the host lattice in trivalent form. The emission peak can be attributed to 5d → 4f transition of rare earth Ce 3+ . The prepared sample is also characterized for its thermoluminescence properties. The TL glow curve of prepared sample showed a single broad peak at 147°C. The trapping parameters are also evaluated by Chen's method. The values of trap depth (E) and frequency factor (s) were found to be 0.64 ± 0.002 eV and 1.43 × 10 7 s –1 respectively. The study of PL and TL along with evaluation of trapping parameters has been undertaken and discussed for the first time. Copyright © 2014 John Wiley & Sons, Ltd.