Abstract In this paper, the (Gd,Y)AG:Mn2+,Ce3+ phosphors were synthesized by high temperature solid-state reaction method. The lattice stabilization, microstructure and fluorescence properties were systematically investigated via XRD, FE-SEM, PLE/PL spectra and fluorescence decay analysis, respectively. Under the excitation of 461 nm, two emission peaks appear at 585 nm and 740 nm, which can be assigned to the transition 5d→4f of Ce3+ and 4T1→6A1 of Mn2+. The color of (Gd,Y)AG:Mn2+,Ce3+ phosphor can be adjusted from yellow to orange-red by changing the doping concentration of Mn2+, and the quenching mechanism of Mn2+ in (Gd,Y)AG: Mn2+,Ce3+ system is attributed to the electric multipole interactions. With the increase of Mn2+ concentrations, the fluorescence lifetime reduced from 152 ns to 9 ns, and the energy transfer efficiency of Ce3+→Mn2+ can be calculated to increase from 35.32% to 95.89%. The underlying mechanisms were thoroughly investigated and elucidated. Furthermore, the thermal stability of (Gd,Y)AG:Mn2+,Ce3+ phosphor systematically studied. The excellent fluorescence properties and high stability of (Gd,Y)AG:Mn2+,Ce3+ phosphor is expected to be widely used in lighting and display areas.

中文翻译：

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通过 Y3+ 掺杂实现 GdAG:Mn2+/Ce3+ 的合成、发光特性和晶体稳定性，用于暖 w-LED 应用

摘要 本文采用高温固相反应法合成了(Gd,Y)AG:Mn2+,Ce3+荧光粉。分别通过XRD、FE-SEM、PLE/PL光谱和荧光衰减分析系统地研究了晶格稳定性、微观结构和荧光性能。在461 nm激发下，在585 nm和740 nm处出现两个发射峰，可归为Ce3+的5d→4f跃迁和Mn2+的4T1→6A1跃迁。(Gd,Y)AG:Mn2+,Ce3+荧光粉的颜色可以通过改变Mn2+的掺杂浓度由黄色变为橙红色，Mn2+在(Gd,Y)AG:Mn2+,Ce3+体系中的猝灭机理为归因于电多极相互作用。随着Mn2+浓度的增加，荧光寿命从152 ns降低到9 ns，计算出Ce3+→Mn2+的能量传递效率从35.32%提高到95.89%。其潜在机制已被彻底研究和阐明。此外，系统研究了(Gd,Y)AG:Mn2+,Ce3+荧光粉的热稳定性。(Gd,Y)AG:Mn2+,Ce3+荧光粉优异的荧光性能和高稳定性有望广泛应用于照明和显示领域。