Synthesis of K2XF6:Mn4+ (X = Ti, Si and Ge) red phosphors for white LED applications with low-concentration of HF
Synthesis of K2XF6:Mn4+ (X = Ti, Si and Ge) red phosphors for white LED applications with low-concentration of HF
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DOI：
10.1016/j.optmat.2015.09.023
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发表时间：
2015-11-01
影响因子：
3.9
通讯作者：
Zhou, Qiang
中科院分区：
文献类型：
--
作者：
Wang, Zhengliang;Zhou, Yayun;Zhou, Qiang
Red phosphors K2XF6:Mn4+ (X = Ti, Si and Ge) have been successfully synthesized by one-pot chemical co-precipitation method in low HF concentration with the addition of acetic acid glacial. The crystal structure and morphology of these phosphors were characterized by powder X-ray diffraction (XRD), scanning-electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS) in detail. Their optical properties were investigated by excitation and emission spectra, diffuse reflectance spectra, and decay curves. These phosphors exhibit intense red emission with high color-purity under blue light excitation. Finally, the applications on the white-light-emitting diodes (WLEDs) of the as-prepared sample were investigated. The WLEDs fabricated with K2XF6:Mn4+ display warm white light with lower color temperature (T-c < 4000 K) and higher color rendering index (Ra > 80). (C) 2015 Elsevier B.V. All rights reserved.
