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Retracted: Studies on the luminescence properties of cerium co‐doping on Ca 2 MgSi 2 O 7 :Eu 2+ phosphor by solid‐state reaction method
Author(s) -
Sahu Ishwar Prasad,
Bisen D. P.,
Murthy K. V. R.,
Tamrakar R. K.
Publication year - 2017
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.3320
Subject(s) - phosphor , mechanoluminescence , photoluminescence , thermoluminescence , afterglow , analytical chemistry (journal) , luminescence , tetragonal crystal system , doping , emission spectrum , ion , materials science , spectroscopy , mineralogy , chemistry , crystal structure , spectral line , crystallography , optoelectronics , physics , gamma ray burst , chromatography , quantum mechanics , astronomy , organic chemistry
Ca 2 MgSi 2 O 7 :Ce 3+ , Ca 2 MgSi 2 O 7 :Eu 2+ and Ca 2 MgSi 2 O 7 :Eu 2+ ,Ce 3+ phosphors were prepared using the solid‐state reaction method. The crystal structures of the sintered phosphors were of melilite type, which has a tetragonal crystallography. The chemical compositions of the sintered phosphors was confirmed by energy dispersive X‐ray spectroscopy. The different thermoluminescence kinetic parameters [activation energy ( E ), frequency factor ( s ) and order of the kinetics ( b )] of these phosphors were evaluated and compared using the peak shape method. Under ultraviolet excitation, the emission spectra of both Ca 2 MgSi 2 O 7 :Eu 2+ and Ca 2 MgSi 2 O 7 :Eu 2+ ,Ce 3+ phosphors were composed of a broad emission band peaking at 530 nm. When the Ca 2 MgSi 2 O 7 :Eu 2+ phosphor is co‐doped with Ce 3+ ions, photoluminescence, afterglow and mechanoluminescence intensity was strongly enhanced. Ca 2 MgSi 2 O 7 :Eu 2+ showed some afterglow with a short persist time. On incorporation of Ce 3+ , efficient energy transfer from Ce 3+ to Eu 2+ was found and the emission intensity of Eu 2+ was enhanced. The mechanoluminescence intensities of Ca 2 MgSi 2 O 7 :Ce 3+ , Ca 2 MgSi 2 O 7 :Eu 2+ and Ca 2 MgSi 2 O 7 :Eu 2+ ,Ce 3+ phosphors increased proportionally increased with the increase in impact velocity, which suggests that these phosphors can be used as sensors to detect stress in an object.