Eu²⁺ activated lithium-containing nitridosilicates attract great attention in the field of phosphors research due to their outstanding luminescent performance. Herein, a nitridolithosilicate Li₂CaSi₂N₄:Eu²⁺ orange-red phosphor was successfully synthesized by solid-state reaction. Upon the 400 nm excitation, the phosphor exhibits a slightly wide and asymmetric emission profile. Meanwhile, the emission band broadens with the increase of Eu²⁺ ions concentration. It may result from Eu²⁺ occupying different positions of Ca²⁺ in the host, which can give rise to different degrees of nephelauxetic effect and crystal field splitting. Considering the effect of the centroid shift (ε_c) and crystal field splitting (ε_cfs), the sources of two luminescence centers are confirmed by calculating the total shift (D(A)) of the 4f5d level of Eu²⁺ in a host. In addition, the temperature dependence luminescent properties of Li₂CaSi₂N₄:Eu²⁺ are investigated as well and the thermal-sensitizing mechanism is discussed.

Eu ²⁺活化的含锂氮硅酸盐硅酸盐因其出色的发光性能而在磷光体研究领域引起了极大的关注。在此，nitridolithosilicate李₂的CaSi ₂ Ñ ₄：Eu的²⁺橙红色荧光体已经成功地由固相反应合成。在400 nm激发下，磷光体显示出稍宽且不对称的发射轮廓。同时，随着Eu ²⁺离子浓度的增加，发射带变宽。这可能是由于Eu ²⁺占据了Ca ^2+的不同位置在宿主中，可以引起不同程度的肾上腺皮质激素作用和晶体场分裂。考虑到质心偏移的效果（ε _Ç）和晶体场分裂（ε _CFS），两个发光中心的源极通过计算总移Eu的4f5d水平的（d（A））证实²⁺在宿主。另外，还研究了Li ₂ CaSi ₂ N ₄：Eu ²⁺的温度依赖性发光性质，并讨论了其热敏机理。