Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 4, Issue 30, Pages 7332-7338Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6tc02093c
Keywords
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Funding
- National Natural Science Foundation of China [51272027, 51472028]
- Science and Technology Project of Guangdong Province [2013B090500114]
- Fundamental Research Funds for the Central Universities [FRF-TP-15-012A1]
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In this paper, narrow-band red-emitting SrLiAl3N4:Eu2+ phosphor has been successfully prepared using a solid-state reaction method. The effects of sintering temperatures, times and fluxes on phase formation and luminescence properties are investigated, respectively. The addition of BaF2 flux not only enhances room-temperature emission intensity, but also improves the luminescence thermal stability, which is ascribed to the increase of crystallinity. Under blue light excitation, the as-prepared SrLiAl3N4: Eu2+ phosphor has a narrow emission band with a peak wavelength at similar to 648 nm and a full-width at half-maximum of similar to 1177 cm(-1) (similar to 50 nm). The critical quenching concentration of Eu2+ is about 1 mol%. White light-emitting-diode (w-LED) devices have been fabricated which are obtained by combining a 455 nm chip with the commercial yellow phosphor and the present red phosphor. The results exhibit a potential application for phosphor-converted LEDs (pc-LEDs).
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