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The novel Sr3LiSbO6:Mn4+, Ca2+ far-red-emitting phosphors with over 95% internal quantum efficiency for indoor plant growth LEDs
Journal of Luminescence ( IF 3.6 ) Pub Date : 2021-04-29 , DOI: 10.1016/j.jlumin.2021.118165
Linyan Fu , Yunlong Yang , Yi Zhang , Xuefei Ren , Yingjie Zhu , Jiajie Zhu , Yi Wu , Jian Wang , Xing Feng

Sr3LiSbO6:x%Mn4+, y%Ca2+ (x = 0.1, 0.2, 0.3, 0.4, 0.5, x: y = 1: 1.5) phosphors have been successfully synthesized via conventional high-temperature solid-state reaction method. The phosphor samples were characterized using X-ray diffraction (XRD), scanning electron microscope (SEM), photoluminescence spectra, ultraviolet–visible (UV–vis) absorption spectra, Raman spectra and decay curves as well as internal quantum efficiency (IQE). The quantum efficiency of Sr3LiSbO6:Mn4+ phosphor can be as high as 96% by co-doping small amount of Ca2+ ions. The excitation and emission intensities of Sr3LiSbO6:Mn4+, Ca2+ phosphors can be enhanced 1.3–1.6 times. Furthermore, the Sr3LiSbO6:0.3%Mn4+, 0.45%Ca2+ phosphor exhibited good thermal stability and the emission intensity at 423 K maintained 87% compared with its initial value at 298 K. Under the excitation of 365 nm, the phosphor exhibits an intense far-red emission band centered at 693 nm which can match well with the absorption band of phytochrome PFR. Finally, a LED device was fabricated with the Sr3LiSbO6:0.3%Mn4+, 0.45%Ca2+ phosphor, which showed an effective promotion of growth in red beans and pakchoi cabbages. All the results show that the synthesized phosphors may have promising applications for use in plant growth LEDs.



中文翻译:

用于室内植物生长LED的新型Sr 3 LiSbO 6:Mn 4+,Ca 2+远红外发射磷光体具有超过95%的内部量子效率

通过常规高温固态已成功合成了Sr 3 LiSbO 6:x%Mn 4+,y%Ca 2+(x = 0.1,0.2,0.3,0.4,0.5 ,x:y = 1:1.5)反应方法。使用X射线衍射(XRD),扫描电子显微镜(SEM),光致发光光谱,紫外-可见(UV-vis)吸收光谱,拉曼光谱和衰减曲线以及内部量子效率(IQE)对荧光粉样品进行了表征。通过共掺杂少量Ca 2+离子,Sr 3 LiSbO 6:Mn 4+荧光粉的量子效率可高达96%。Sr 3 LiSbO的激发和发射强度6:Mn 4+,Ca 2+荧光粉可增强1.3-1.6倍。此外,Sr 3 LiSbO 6:0.3%Mn 4+,0.45%Ca 2+荧光粉表现出良好的热稳定性,并且在423K时的发射强度与其在298K时的初始值相比保持了87%。在365 nm的激发下,磷光体在693 nm处显示出很强的远红外发射带,可以很好地与植物色素P FR的吸收带匹配。最后,用Sr 3 LiSbO 6:0.3%Mn 4+,0.45%Ca 2+制造LED器件。磷,可有效促进红豆和小白菜的生长。所有结果表明,合成的磷光体在植物生长LED中可能具有广阔的应用前景。

更新日期:2021-05-04
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