Rapid development of solid-state lighting technology requires new materials with highly efficient and stable luminescence, and especially relies on blue light pumped red phosphors for improved light quality. Herein, we discovered an unprecedented red-emitting Mg₂Al₄Si₅O₁₈:Eu²⁺ composite phosphor (λ_ex = 450 nm, λ_em = 620 nm) via the crystallization of MgO–Al₂O₃–SiO₂ aluminosilicate glass. Combined experimental measurement and first-principles calculations verify that Eu²⁺ dopants insert at the vacant channel of Mg₂Al₄Si₅O₁₈ crystal with six-fold coordination responsible for the peculiar red emission. Importantly, the resulting phosphor exhibits high internal/external quantum efficiency of 94.5/70.6%, and stable emission against thermal quenching, which reaches industry production. The maximum luminous flux and luminous efficiency of the constructed laser driven red emitting device reaches as high as 274 lm and 54 lm W⁻¹, respectively. The combinations of extraordinary optical properties coupled with economically favorable and innovative preparation method indicate, that the Mg₂Al₄Si₅O₁₈:Eu²⁺ composite phosphor will provide a significant step towards the development of high-power solid-state lighting.

固态照明技术的飞速发展需要具有高效且稳定发光的新材料，尤其是依靠蓝光泵浦的红色磷光体来改善光质量。在此，我们发现了一种前所未有的红色发射的Mg ₂的Al ₄的Si ₅ ø ₁₈：Eu的²⁺复合磷光体（λ _EX  = 450nm处，λ _EM  = 620纳米）通过MgO的Al的结晶₂ ö ₃ -SiO ₂硅铝酸盐玻璃。结合实验测量和第一性原理计算，验证了Eu ²⁺掺杂剂插入了Mg ₂的空通道中具有四重配位的Al ₄ Si ₅ O ₁₈晶体负责特殊的红色发射。重要的是，所得的磷光体显示出94.5 / 70.6％的高内部/外部量子效率，并且在达到工业生产的状态下具有稳定的抗热淬火发射性能。所构造的激光驱动红色发射装置的最大光通量和发光效率分别高达274 lm和54 lm W ^-1。Mg ₂ Al ₄ Si ₅ O ₁₈：Eu ²⁺具有非凡的光学性能，再加上经济上有利的创新方法的结合。 复合荧光粉将为大功率固态照明的发展迈出重要的一步。