NDLI: Highly efficient red phosphor Cs2GeF6:Mn4+ for warm white light-emitting diodes

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Highly efficient red phosphor Cs2GeF6:Mn4+ for warm white light-emitting diodes

Content Provider	Semantic Scholar
Author	Wang, Zhengliang Zhou, Yayun Liu, Yong Zhou, Qiang Luo, Lijun Tan, Huiying Zhang, Qiuhan Chen, Guo Peng, Jin-Hui
Copyright Year	2015
Abstract	Red phosphor Cs2GeF6:Mn4+ has been synthesized by the cation exchange method. The as-prepared phosphor was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectrometer (EDS), atomic absorption spectrophotometer (AAS), thermogravimetry (TG) and differential scanning calorimetry (DSC). Its optical properties were investigated by photo-luminescence spectra (PL), diffuse reflectance spectra (DRS), the low-temperature emission spectrum and the luminescence decay curve. The sample doped with 8.78 mol% Mn4+ exhibits an intense red emission with a high thermal stability and appropriate CIE coordinates (x = 0.69, y = 0.31), and its emission intensity is higher than that of commercial K2TiF6:Mn4+. The white light-emitting diodes (WLEDs) fabricated with this sample exhibit intense warm white-light with a low color temperature (Tc = 3673 K), high color rendering index (Ra = 84.9) and high luminous efficacy (LE = 141.5 lm W−1). So Cs2GeF6:Mn4+ may be a promising red component for warm WLEDs.
Starting Page	82409
Ending Page	82414
Page Count	6
File Format	PDF HTM / HTML
DOI	10.1039/C5RA18070H
Volume Number	5
Alternate Webpage(s)	http://www.rsc.org/suppdata/c5/ra/c5ra18070h/c5ra18070h1.pdf
Alternate Webpage(s)	https://doi.org/10.1039/C5RA18070H
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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