Abstract Non-rare-earth-based Ca3Al4ZnO10:Mn4+,Mg2+ (CAZO:Mn4+,Mg2+) phosphors with admirable luminescence performance and great potential as far-red light source for plant growth light-emitting diodes (LEDs) were reported in this paper. The concentration-dependent optical properties of the as-prepared phosphors were investigated in detail. Under ultraviolet-light excitation at 358 nm, the composition-optimized CAZO:0.4%Mn4+,14%Mg2+ phosphor showed an intense broad far-red emission band in the 625–830 nm wavelength range with a maximum at 714 nm, which was due to the 2Eg→4A2g transition of Mn4+ ions. The luminescence intensity of the CAZO:0.4%Mn4+,14%Mg2+ phosphor was about 1.82 times higher than that of CAZO:0.4%Mn4+ phosphor, and the corresponding mechanism for the luminescence enhancement via Mg2+ doping was studied. Amazingly, the internal quantum efficiency of the CAZO:0.4%Mn4+ phosphor was increased from 31 to 60% after co-doping 14 mol% Mg2+. The CAZO:0.4%Mn4+,14%Mg2+ phosphor also showed enhanced thermal stability compared with the CAZO:0.4%Mn4+ counterpart. It was found that, for CAZO:0.4%Mn4+,14%Mg2+ phosphor, the emission intensity at 423 K (150 °C) was about 51% of that at 303 K (30 °C), while the corresponding activation energy was determined to be 0.245 eV.

中文翻译：

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通过 Mg2+ 掺杂同时增强 Ca3Al4ZnO10:Mn4+ 荧光粉的远红光发光和热稳定性用于植物生长照明

摘要 本文报道了非稀土基Ca3Al4ZnO10:Mn4+,Mg2+(CAZO:Mn4+,Mg2+)荧光粉，该荧光粉具有优异的发光性能和作为植物生长发光二极管(LED)远红光光源的巨大潜力。详细研究了所制备的磷光体的浓度依赖性光学性质。在 358 nm 的紫外光激发下，成分优化的 CAZO：0.4%Mn4+,14%Mg2+ 荧光粉在 625-830 nm 波长范围内显示出强烈的宽远红光发射带，最大波长为 714 nm，这是由于到 Mn4+ 离子的 2Eg→4A2g 跃迁。CAZO:0.4%Mn4+,14%Mg2+荧光粉的发光强度比CAZO:0.4%Mn4+荧光粉高约1.82倍，并研究了Mg2+掺杂增强发光的相应机制。令人惊讶的是，共掺杂 14 mol% Mg2+ 后，CAZO:0.4%Mn4+ 荧光粉的内量子效率从 31% 提高到 60%。与 CAZO:0.4%Mn4+ 对应物相比，CAZO:0.4%Mn4+,14%Mg2+ 荧光粉还表现出增强的热稳定性。发现对于CAZO:0.4%Mn4+,14%Mg2+荧光粉，423 K（150℃）下的发射强度约为303K（30℃）下的51%，同时测定了相应的活化能为 0.245 eV。