Luminescent properties of novel red-emitting phosphor Na3TaF8 with non-equivalent doping of Mn4+ for LED backlighting

Luminescent properties of novel red-emitting phosphor Na3TaF8 with non-equivalent doping of Mn4+ for LED backlighting
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LED背光源非等量掺杂Mn4新型红光荧光粉Na3TaF8的发光性能

DOI:
10.1016/j.jlumin.2017.07.064
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发表时间:
2017-12
影响因子:
3.6
通讯作者:
Hongbin Liang
Hongbin Liang
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Zhengliang Wang;Nan Wang;Zhiyu Yang;Zhaofeng Yang;Qianwen Wei;Qiang Zhou;Hongbin Liang

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本文采用Mn 4+非等掺杂的方法,在温和条件下合成了一种新型的红色荧光粉Na 3 TaF 8:Mn 4+。采用X射线粉末衍射(XRD)、扫描电镜(SEM)对产物的晶体结构和形貌进行了表征。该样品为单相单斜晶体结构。Mn ~(4+)可能占据了Na_3 TaF_8中Ta ~(5+)的位置,位于由8个F ~-配位的独特的四方反棱柱的中心。所制备的Na 3 TaF 8:Mn 4+在蓝光激发下具有较强的红光发射,且色纯度较高。Mn ~(4+)在这种基质中的发光行为与某些八面体无序结构的六氟化合物中的发光行为相似。基于Na 3 TaF 8:Mn 4+的单个红色LED可以观察到强烈的红光。这些结果表明该磷光体是用于LED背光的潜在红色组分。
Herein, a new red-emitting phosphor, Na3TaF8:Mn4+, was synthesized by non-equivalent doping of Mn4+under mild condition. Its crystal structure and morphology were characterized by the powder X-ray diffraction (XRD), scanning electron microscopy (SEM). This sample is of single phase with monoclinic crystal structure. Mn4+might occupy the site of Ta5+in Na3TaF8, being located at the center of uniquely tetragonal anti-prism coordinated by eight F-. The as-prepared Na3TaF8:Mn4+has sharp red emissions with higher color purity under the blue light excitation. The luminescent behavior of Mn4+in such host is similar with that in some hexafluorides with disordered octahedral structure. Intense red light can be observed from the single red LED based on Na3TaF8:Mn4+. These results show this phosphor to be a potentially red component for LED backlighting.
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