Abstract A novel-far red emission Li6CaLa2Sb2O12 (LCLSO):Mn4+ phosphor was prepared by traditional high temperature solid state reaction method. The morphology, spectral characteristics and luminescence properties of the phosphors were all studied systematically. Based on the results, when x = 0.0045 (x represents the doping concentration of Mn4+), the emission intensity of LCLSO:xMn4+ phosphor reaches the maximum, and the concentration quenching occurs after the Mn4+ doping concentration exceeds 0.0045. In addition, the effect of Al3+-doped on the luminescent properties of the materials was also studied. The optimum doping concentration of Al3+ is y = 0.009 (y represents the doping concentration of Al3+), and the luminescence intensity of Mn4+ can be increased about 4 times. Moreover, the integrated luminescence intensity, the thermal activation energy, and decay time can be obtained via calculation. In summary, LCLSO:Mn4+, Al3+ phosphor exhibits good luminescence efficiency and thermal stability, and possesses the latent application foreground in plant growth lighting.

中文翻译：

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一种用于植物栽培的具有石榴石结构的新型 Al3+ 改性 Li6CaLa2Sb2O12:Mn4+ 远红光荧光粉

摘要 采用传统的高温固相反应法制备了新型远红光发射Li6CaLa2Sb2O12 (LCLSO):Mn4+荧光粉。系统地研究了荧光粉的形貌、光谱特性和发光特性。结果表明，当x=0.0045（x代表Mn4+的掺杂浓度）时，LCLSO:xMn4+荧光粉的发射强度达到最大值，Mn4+掺杂浓度超过0.0045后发生浓度猝灭。此外，还研究了Al3+掺杂对材料发光性能的影响。Al3+的最佳掺杂浓度为y=0.009（y代表Al3+的掺杂浓度），Mn4+的发光强度可提高4倍左右。此外，积分发光强度，热活化能和衰减时间可以通过计算得到。综上所述，LCLSO:Mn4+、Al3+荧光粉具有良好的发光效率和热稳定性，在植物生长照明方面具有潜在的应用前景。