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Mechanism Analysis of a Narrow-band Ultra-bright Green Phosphor with its Prospect in White Light-emitting Diodes and Field Emission Displays

Abstract

In the current study, aiming to get brighter green phosphors for LEDs and FEDs, Ce3+ and Tb3+ were successfully co-doped into the newly discovered matrix, 24 [Mg1.25Si1.25Al2.5]O3N3 through solid-state reaction. The sample presents a broad excitation band covering (n-)UV region from 240 to 420nm and a sharp green Tb3+ characteristic emission with hardly observed Ce3+ emission. The efficient energy transfer mechanism from Ce3+ to Tb3+ has been calculated to be dipole–dipole interaction, which leads to a 13% higher brightness at its optimum excitation than the green phosphor of BaSrSiO4:Eu2+ commodity. The gentle thermal quenching trend and relatively high quantum yield of the sample is also remarkable. A LED lamp fabricated by the sample and the commercial phosphors got better performances than traditional one with a color rendering index of 84.5 and CIE coordinate of (0.3190, 0.3290). Additionally, the cathodoluminescence spectra of the sample display a fantastic unsaturated and anti-degradation as well. All the results come to a conclusion that [Mg1.25Si1.25Al2.5]O3N3: Ce3+, Tb3+ could be considered as a promising green-emitting material for white LEDs and FEDs application.

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Publication details

The article was received on 23 Oct 2018, accepted on 23 Nov 2018 and first published on 25 Nov 2018


Article type: Paper
DOI: 10.1039/C8TC05330H
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Mechanism Analysis of a Narrow-band Ultra-bright Green Phosphor with its Prospect in White Light-emitting Diodes and Field Emission Displays

    J. Li, X. Zhou, J. Ding, X. Zhou and Y. Wang, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC05330H

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