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Issue 8, 2019
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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

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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, [Mg1.25Si1.25Al2.5]O3N3 through solid-state reaction. The sample presents a broad excitation band covering (n-)UV region from 240 to 420 nm and a sharp green Tb3+ characteristic emission with negligible 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 demonstrated better performances than the 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 an outstanding unsaturated peak intensity and anti-degradation as well. The results indicate that [Mg1.25Si1.25Al2.5]O3N3:Ce3+,Tb3+ could be considered as a promising green-emitting material for white LEDs and FEDs application.

Graphical abstract: Mechanism analysis of a narrow-band ultra-bright green phosphor with its prospect in white light-emitting diodes and field emission displays

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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, 2019,7, 2257-2266

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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, 2019, 7, 2257
    DOI: 10.1039/C8TC05330H

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