Abstract The red oxide phosphors activated by Mn4+ have become a research hotspot because of their excellent physical/chemical stability, which can be applied in the field of light-emitting diodes (LED) plant growth lighting. Here, a new type of Sr9Gd2W4O24 (SGWO):Mn4+ red phosphor was prepared by traditional high temperature solid state reaction method. The phase compositions and morphologies of powders were analyzed by X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The luminescent properties of the samples with varying Mn4+ concentrations were investigated, and the photoluminescence excitation (PLE) spectra illustrate that samples can be effectively excited by near-ultraviolet/blue light. Furthermore, typical concentration quenching occurs when the doping concentration of Mn4+ exceeds 0.4 mol%. In addition, the thermal activation energy of the sample was calculated to be 0.3641 eV. Importantly, under the excitation of near-UV light at 365 nm, SGWO:0.004Mn4+ phosphor can emit bright far-red light. All the results indicated that SGWO:Mn4+ phosphors have potential application value in indoor plant cultivation.

中文翻译：

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Mn4+ 掺杂四钨酸盐 Sr9Gd2W4O24 远红荧光粉：合成、发光特性及在室内植物栽培中的潜在应用

摘要 Mn4+激活的红色氧化物荧光粉因其优异的物理/化学稳定性而成为研究热点，可应用于发光二极管（LED）植物生长照明领域。在这里，采用传统的高温固相反应方法制备了一种新型 Sr9Gd2W4O24 (SGWO):Mn4+ 红色荧光粉。通过X射线衍射（XRD）和场发射扫描电子显微镜（FE-SEM）分析粉末的相组成和形貌。研究了具有不同 Mn4+ 浓度的样品的发光特性，光致发光激发 (PLE) 光谱表明样品可以被近紫外/蓝光有效激发。此外，当 Mn4+ 的掺杂浓度超过 0.4 mol% 时，会发生典型的浓度猝灭。此外，计算出样品的热活化能为 0.3641 eV。重要的是，在 365 nm 近紫外光的激发下，SGWO:0.004Mn4+ 荧光粉可以发出明亮的远红光。所有结果表明SGWO:Mn4+荧光粉在室内植物栽培中具有潜在的应用价值。