Synthesis, luminescence properties of a novel oxyfluoride red phosphor BaTiOF4::Mn4+ for LED backlighting
Synthesis, luminescence properties of a novel oxyfluoride red phosphor BaTiOF4::Mn4+ for LED backlighting
复制标题
LED背光用新型氟氧化物红色荧光粉BaTiOF4:Mn4的合成及发光性能
DOI：
10.1016/j.optmat.2019.01.075
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发表时间：
2019-04-01
影响因子：
3.9
通讯作者：
Wang, Zhengliang
中科院分区：
文献类型：
--
作者：
Liang, Zibo;Yang, Zhaofeng;Wang, Zhengliang
本工作采用两步湿法在常温下合成了一种新型的掺杂Mn4+的BaTiOF4红色荧光粉。用粉末X射线衍射(XRD)、扫描电子显微镜(SEM)、能量色散X射线能谱(EDS)和能量色散X射线荧光光谱仪(EDS)对样品的晶体结构、形貌和元素组成进行了表征。从发射光谱、激发光谱和紫外-可见漫反射光谱(DRS)等方面对其发光性能进行了研究。所制备的BaTiO4：Mn4+产物在470 nm蓝光照射下，结晶良好，为单一的颗粒状正交相，在631 nm附近有锐利的红色发射线。基于新型BaTiO4：Mn4+荧光粉的单色红色发光二极管具有鲜艳的红色，CIE色度坐标值分别为x=0.692和y=0.308，这表明它可能在发光二极管背光源中得到应用。
In this work, a novel Mn4+ doped BaTiOF4 oxyfluoride red-emitting phosphor was fabricated through a two-step wet chemical synthesis on a large scale at an ambient temperature. The crystal structure, morphology, and elemental composition were confirmed by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and energy dispersive X-ray fluorescence spectrometer respectively. The luminescence properties were investigated from emission, excitation and ultraviolet-visible diffuse reflectance (DRS). The as-prepared BaTiOF4:Mn4+ product is well crystallized into single orthorhombic phase with particulate morphology and presents sharp red emission lines locating around 631 nm under illumination at 470 nm blue light. The single red LED, based on the novel BaTiOF4:Mn4+ phosphor exhibits bright red color with CIE chromaticity coordinate values of x = 0.692 and y = 0.308, revealing it may find application in LED backlighting.