NDLI: Abnormal site occupancy and high performance in warm WLEDs of a novel red phosphor, NaHF2:Mn4+, synthesized at room temperature.

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Abnormal site occupancy and high performance in warm WLEDs of a novel red phosphor, NaHF2:Mn4+, synthesized at room temperature.

Content Provider	Semantic Scholar
Author	Xi, Luqing Pan, Yuexiao Zhu, Mengmeng Lian, Hongzhou
Copyright Year	2017
Abstract	A novel red phosphor, NaHF2:Mn4+ (NHF:Mn), was obtained via substituting Na+ located at the center of the octahedron coordinated with six F- ions with Mn4+ in the host lattice of NHF. The phase purity and the exact composition of the obtained NHF:Mn were confirmed by X-ray powder diffraction (XRD), Rietveld refinement, energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), and infrared (IR) spectroscopy, respectively. The luminescence intensity of NHF:Mn was enhanced by optimizing the synthetic conditions. A series of warm white light-emitting diodes (WLEDs) with a color rendering index (CRI) higher than 88.0 and correlated color temperatures (CCT) between 3146 and 5172 K were obtained by encapsulating the as-prepared red phosphor NHF:Mn with the yellow one Y3Al5O12:Ce3+ (YAG:Ce) on blue chips. The advantage of the synthetic strategy to obtain NHF:Mn can be extended to develop novel Mn4+ doped red phosphors via substituting for central ions with unequal electric charge in the centers of octahedra.
Starting Page	13835
Ending Page	13844
Page Count	10
File Format	PDF HTM / HTML
DOI	10.1039/c7dt03107f
PubMed reference number	28967033
Journal	Medline
Volume Number	46
Issue Number	40
Alternate Webpage(s)	http://www.rsc.org/suppdata/c7/dt/c7dt03107f/c7dt03107f1.pdf
Alternate Webpage(s)	https://doi.org/10.1039/c7dt03107f
Journal	Dalton transactions
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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