Xi Luqing, Pan Yuexiao, Zhu Mengmeng, Lian Hongzhou, Lin Jun
Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, P.R. China.
Dalton Trans. 2017 Oct 17;46(40):13835-13844. doi: 10.1039/c7dt03107f.
A novel red phosphor, NaHF:Mn (NHF:Mn), was obtained via substituting Na located at the center of the octahedron coordinated with six F ions with Mn 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 YAlO:Ce (YAG:Ce) on blue chips. The advantage of the synthetic strategy to obtain NHF:Mn can be extended to develop novel Mn doped red phosphors via substituting for central ions with unequal electric charge in the centers of octahedra.
通过用锰取代位于与六个氟离子配位的八面体中心的钠，在NHF主体晶格中获得了一种新型红色荧光粉NaHF:Mn（NHF:Mn）。分别通过X射线粉末衍射（XRD）、Rietveld精修、能量色散光谱（EDS）、透射电子显微镜（TEM）和红外（IR）光谱确认了所得NHF:Mn的相纯度和确切组成。通过优化合成条件提高了NHF:Mn的发光强度。通过将制备的红色荧光粉NHF:Mn与黄色荧光粉YAlO:Ce（YAG:Ce）封装在蓝色芯片上，获得了一系列显色指数（CRI）高于88.0且相关色温（CCT）在3146至5172 K之间的暖白色发光二极管（WLED）。获得NHF:Mn的合成策略的优势可以扩展到通过用八面体中心带不等电荷的中心离子进行取代来开发新型锰掺杂红色荧光粉。
