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Novel tunable green-red-emitting oxynitride phosphor co-activated with Ce3+, Tb3+, and Eu3+: photoluminescence and energy transfer

Abstract

A series of novel Ce3+, Tb3+ and Eu3+ ions doped Y4SiAlO8N-based oxynitride phosphors were synthesized by the solid-state method and characterized by X-ray powder diffraction, scanning electron microscopy, photoluminescence, lifetimes and thermo-luminescence. The excitation of the Ce3+/Tb3+ co-doped and Ce3+/Tb3+/Eu3+ tri-doped phosphor with the near-UV radiation results in strong linear Tb3+ green and Eu3+ red emission. The occurrence of Ce3+-Tb3+ and Ce3+-Tb3+-Eu3+ energy transfer process are responsible for the bright green or red luminescence. The Tb3+ ion acted as an energy transfer bridge can alleviate MMCT quenching between Ce3+-Eu3+ ion pairs. The lifetime measurements demonstrated the energy-transfer mechanism of Ce3+→Tb3+ and Tb3+→Eu3+ is dipole−quadrupole and quadrupole−quadrupole interactions, respectively. Temperature dependent luminescence measurements showed that as-prepared green/red phosphors have a good thermal stability against temperature quenching. The obtained results indicated that these phosphors might serve as promising candidates for n-UV LEDs

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Publication details

The article was received on 18 Apr 2017, accepted on 12 Jun 2017 and first published on 12 Jun 2017


Article type: Paper
DOI: 10.1039/C7CP02507F
Citation: Phys. Chem. Chem. Phys., 2017, Accepted Manuscript
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    Novel tunable green-red-emitting oxynitride phosphor co-activated with Ce3+, Tb3+, and Eu3+: photoluminescence and energy transfer

    J. huo, L. Dong, W. Lv, B. Shao and H. You, Phys. Chem. Chem. Phys., 2017, Accepted Manuscript , DOI: 10.1039/C7CP02507F

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