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Eu 3+ Photoluminescence in CaYTiNbO 7 Pyrochlore: A Promising Orange‐Red Phosphor for White‐Light‐Emitting Diodes
Author(s) -
Tiwari Hansnath,
Varadaraju Upadhyayula Venkata,
Naidu Salla Asiri
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201701794
Subject(s) - photoluminescence , phosphor , pyrochlore , magnetic dipole transition , materials science , orange (colour) , light emitting diode , analytical chemistry (journal) , electric dipole transition , white light , diode , luminescence , mineralogy , crystallography , dipole , optoelectronics , chemistry , optics , phase (matter) , physics , magnetic dipole , organic chemistry , chromatography
CaY 1‐x Eu x TiNbO 7 compositions with pyrochlore structure were synthesized by solid state reaction technique and photoluminescence was studied. Photoluminescence emission results reveal that the 5 D 0 → 7 F 1 magnetic dipole transition has higher intensity indicating that Eu 3+ occupies a centrosymmetric site in the host lattice. The critical concentration of Eu 3+ was found to be x =0.5. The CaY 0.5 Eu 0.5 TiNbO 7 phase shows higher orange‐red emission when compared to that of commercial red phosphor, Y 2 O 3 :Eu 3+ .