Journal
JOURNAL OF LUMINESCENCE
Volume 244, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2021.118665
Keywords
Luminescence; Niobate; Phosphor; Sm3+ ; KCa2Nb3O10
Categories
Funding
- Chinese Universities Scientific Fund [2452019076, 2452020017]
- Doctoral Scientific Research Foundation of Northwest AF University [Z109021814, Z1090219099]
- Con-struction Program of the key discipline in Hunan Province
- Projects of the Education Department of Hunan Province [18A465]
- Science and Technology Plan Project of Chenzhou city [jsyf2017014]
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Novel layered niobate KCa2Nb3O10:Sm3+ orange red phosphors with potential application in white light-emitting diodes (w-LEDs) have been prepared successfully.
In this study, novel layered niobate KCa2Nb3O10:Sm3+ orange red phosphors have been successfully prepared by adopting the molten-salt method. The phase purity, surface morphology, photoluminescence properties, thermal stability, and fluorescence lifetime are systematically demonstrated. The X-ray diffraction (XRD) analysis revealed that these powders were pure phase and crystallized in an orthorhombic with a space group of Cmcm (No.63). Under 407 nm excitation, the KCa2Nb3O10:Sm3++ phosphors have the strongest emission peak at 603 nm which can be put down to the H-6(5/2) ->(4)F7/2 transition of Sm3+. The optimum concentration of KCa2Nb3O10:xSm(3+) is 5 mol%. The KCa2Nb3O10:Sm3+ phosphors display excellent thermostability because of their high T-0.5 (over 480 K). Meanwhile, these samples show a high color purity from 96.6 to 98.2%. The white light-emitting diodes (w-LEDs) have been prepared with flying colors. All the results indicated that the potential application of the new kind of KCa2Nb3O10:Sm3+ luminescent powder in w-LEDs.& nbsp;& nbsp;
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