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首页> 外文期刊>RSC Advances >Synthesis, structure, and luminescence characteristics of far-red emitting Mn4+-activated LaScO3 perovskite phosphors for plant growth
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Synthesis, structure, and luminescence characteristics of far-red emitting Mn4+-activated LaScO3 perovskite phosphors for plant growth

机译：远红外线发射的Mn4 +活化的LaScO3钙钛矿型荧光粉的合成，结构和发光特性，用于植物生长

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摘要

Far-red emitting phosphors LaScO _(3) :Mn ~(4+) were successfully synthesized via a high-temperature solid-state reaction method. The X-ray powder diffraction confirmed that the pure-phase LaScO _(3) :Mn ~(4+) phosphors had formed. Under 398 nm excitation, the LaScO _(3) :Mn ~(4+) phosphors emitted far red light within the range of 650–800 nm peaking at 703 nm (14?225 cm ~(?1) ) due to the ~(2) E _(g) → ~(4) A _(2g) transition, which was close to the spectral absorption center of phytochrome P _(FR) located at around 730 nm. The optimal doping concentration and luminescence concentration quenching mechanism of LaScO _(3) :Mn ~(4+) phosphors was found to be 0.001 and electric dipole–dipole interaction, respectively. And the CIE chromaticity coordinates of the LaScO _(3) :0.001Mn ~(4+) phosphor were (0.7324, 0.2676). The decay lifetimes of the LaScO _(3) :Mn ~(4+) phosphors gradually decreased from 0.149 to 0.126 ms when the Mn ~(4+) doping concentration increased from 0.05 to 0.9 mol%. Crystal field analysis showed that the Mn ~(4+) ions experienced a strong crystal field in the LaScO _(3) host. The research conducted on the LaScO _(3) :Mn ~(4+) phosphors illustrated their potential application in plant lighting to control or regulate plant growth.
机译：通过高温固相反应方法成功合成了发射红光的荧光粉LaScO_（3）：Mn〜（4+）。 X射线粉末衍射证实已经形成纯相LaScO_（3）：Mn〜（4+）荧光粉。在398 nm激发下，LaScO _（3）：Mn〜（4+）荧光粉发出650-800 nm范围内的远红光，这是由于〜导致在703 nm（14？225 cm〜（？1））达到峰值。 （2）E _（g）→〜（4）A _（2g）跃迁，它接近位于730 nm附近的植物色素P _（FR）的光谱吸收中心。发现LaScO_（3）：Mn〜（4+）荧光粉的最佳掺杂浓度和发光浓度猝灭机理分别为0.001和电偶极-偶极相互作用。 LaScO_（3）：0.001Mn〜（4+）荧光粉的CIE色度坐标为（0.7324，0.2676）。当Mn〜（4+）的掺杂浓度从0.05 mol％增加到0.9 mol％时，LaScO_（3）：Mn〜（4+）荧光粉的衰减寿命从0.149毫秒逐渐减小到0.126 ms。晶体场分析表明，Mn〜（4+）离子在LaScO _（3）主体中经历了很强的晶体场。对LaScO _（3）：Mn〜（4+）荧光粉进行的研究表明了其在植物照明中控制或调节植物生长的潜在应用。

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