Journal
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Volume 29, Issue 5, Pages 4122-4127Publisher
SPRINGER
DOI: 10.1007/s10854-017-8356-6
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Funding
- Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)
- National Natural Science Foundation of China [51202111]
- Research and Innovation Program for College Graduates of Jiangsu Province [KYCX17_0970]
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A series of double perovskite Gd2(1-x)MgTiO6:xEu(3+) (x = 0.01, 0.05, 0.1, 0.15, 0.2, 0.3 and 0.5) phosphors were successfully synthesized. Two rare earth ions occupy the A-site in this host, which benefits the doping of Eu3+ ions. The crystal structure, microstructure were examined by X-ray diffraction and scanning electron microscopy. Luminescence properties, such as excitation and emission spectra, CIE coordinates and concentration quenching were systematically investigated. A weak magnetic dipole transition (D-5(0)-F-7(1), 590 nm) and a strong electric dipole transition (D-5(0)-F-7(2), 616 nm) existed in the emission spectra. The quenching concentration for hypersensitive electric dipole transition of Eu3+ reached up to 15.0 mol%. The delayed concentration quenching was observed in Gd2MgTiO6:Eu3+ phosphors. The theoretical quenching concentration was obtained based on Ozawa's theory, and the quenching mechanism on Dexter's theory. All the results indicate that Gd2MgTiO6:Eu3+ has great potential in solid state lighting.
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