Abstract In this paper, the luminescence properties of Ca2ZnSi2O7:Sm3+ phosphors were improved by co-doping with M3+ (M = Bi, Al) via the sol-combustion method. The structure and luminescence properties of the Ca2ZnSi2O7:Sm3+, M3+ samples were investigated in detail, especially the luminescence enhancement effect of Bi3+/Al3+ co-doping. XRD results indicated that moderate Bi3+/Al3+ co-doping in the host structure did not change the tetragonal structure of Ca2ZnSi2O7. The series of Ca2ZnSi2O7:Sm3+, M3+ phosphors could be excited by 402 nm near-ultraviolet light and several significant emission peaks were obtained at 567, 604 and 650 nm, which originated from the electron transitions of Sm3+ from 4G5/2 to 6H5/2, 6H7/2 and 6H9/2 levels, respectively. The luminescence intensity of Ca2ZnSi2O7:Sm3+ was markedly enhanced through Bi3+/Al3+ co-doping, which could be explained by Al3+ decreasing the crystal field symmetry and greatly increasing the red luminescence intensity, and Bi3+ functioning as a sensitizer to increasing the luminescence intensity through energy transfer from Bi3+ to Sm3+ ions. In conclusion, the excellent Ca2ZnSi2O7:Sm3+, M3+ phosphors have potential application as red phosphors in white light emitting diodes.

中文翻译：

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M3+ (M = Bi, Al) 共掺杂对 Ca2ZnSi2O7:Sm3+ 橙红色荧光粉发光增强的影响

摘要 本文通过溶胶燃烧法与M3+ (M = Bi, Al)共掺杂提高Ca2ZnSi2O7:Sm3+荧光粉的发光性能。详细研究了Ca2ZnSi2O7:Sm3+、M3+样品的结构和发光性能，特别是Bi3+/Al3+共掺杂的发光增强效果。XRD 结果表明，在主体结构中适度的 Bi3+/Al3+ 共掺杂不会改变 Ca2ZnSi2O7 的四方结构。Ca2ZnSi2O7:Sm3+、M3+系列荧光粉可以被402 nm的近紫外光激发，在567、604和650 nm处获得了几个显着的发射峰，这源于Sm3+从4G5/2到6H5/2的电子跃迁、 6H7/2 和 6H9/2 水平，分别。Ca2ZnSi2O7:Sm3+的发光强度通过Bi3+/Al3+共掺杂显着增强，这可以解释为 Al3+ 降低了晶体场对称性并大大增加了红色发光强度，而 Bi3+ 作为敏化剂通过从 Bi3+ 到 Sm3+ 离子的能量转移来增加发光强度。总之，优异的Ca2ZnSi2O7:Sm3+、M3+荧光粉在白光发光二极管中作为红色荧光粉具有潜在的应用价值。