In this paper, Lu³⁺ ions (<10 _at. %) were doped into Ba₂SiO₄:Eu²⁺ phosphors by the high temperature solid-state reaction. The effects of Lu³⁺ ions on the structure and photoluminescent properties were investigated in detail. Photoluminescence spectra indicate that no energy transfer between Lu³⁺ ions and Eu²⁺ ions, while Eu²⁺ green luminescence intensity increases with Lu³⁺ dopant concentration increasing. The increasing in Eu²⁺/Eu³⁺ amount ratio is proved by luminescence spectra, thermoluminescence spectra, X-ray photoelectron spectroscopy and Electron Spin Resonance spectra. Then the underlying mechanism, as Lu³⁺ ions dopant improving the conversion of Eu³⁺→Eu²⁺, is identified. The Ba₂SO₄ crystal structure rigidity is increased by Lu³⁺ ion dopant, which is determined from Debye temperature (Θ_D) analysis. This would promote Eu³⁺ to be Eu²⁺ in. The work gives a reasonable explanation for luminescence improvement in Ba₂SiO₄:Eu²⁺ phosphor with Lu³⁺ dopant.

在本文中，Lu ³⁺离子( <10 _at. % )通过高温固相反应掺杂到Ba ₂ SiO ₄ :Eu ²⁺荧光粉中。详细研究了Lu ³⁺离子对结构和光致发光性能的影响。光致发光光谱表明Lu ³⁺离子和Eu ²⁺离子之间没有能量转移，而Eu ²⁺绿色发光强度随着Lu ³⁺掺杂浓度的增加而增加。Eu ²⁺ /Eu ³⁺的增加量比由发光光谱、热释光光谱、X射线光电子能谱和电子自旋共振光谱证明。然后确定了潜在机制，如 Lu ³⁺离子掺杂剂提高了 Eu ³⁺ →Eu ²⁺的转化。Ba ₂ SO ₄晶体结构刚性通过Lu ³⁺离子掺杂剂增加，其由德拜温度( Θ _D )分析确定。这将促进 Eu ³⁺成为 Eu ²⁺。该工作为 Ba ₂ SiO ₄ :Eu ²⁺荧光粉与 Lu 的发光改进提供了合理的解释³⁺掺杂剂。