Glass crystallization making red phosphor for high-power warm white lighting.
Glass crystallization making red phosphor for high-power warm white lighting.
复制标题
玻璃结晶制红荧光粉，用于大功率暖白色照明。
DOI：
10.1038/s41377-021-00498-6
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发表时间：
2021-03-12
期刊：
影响因子：
--
通讯作者：
Zhang Q
中科院分区：
文献类型：
--
作者：
Hu T;Ning L;Gao Y;Qiao J;Song E;Chen Z;Zhou Y;Wang J;Molokeev MS;Ke X;Xia Z;Zhang Q
固态照明技术的快速发展需要高效、稳定发光的新材料，特别是依靠蓝光泵浦红色荧光粉来提高光质量。在此，我们通过MgO-Al2O3-SiO2铝硅酸盐玻璃的结晶发现了前所未有的红光发射Mg2Al4Si5O18:Eu2+复合荧光粉（λex = 450 nm，λem = 620 nm）。结合实验测量和第一性原理计算验证了Eu2+掺杂剂以六重配位插入Mg2Al4Si5O18晶体的空通道中，导致了特殊的红光发射。重要的是，所得荧光粉具有94.5/70.6%的高内/外量子效率，并且具有抗热猝灭的稳定发射特性，达到了工业化生产。所构建的激光驱动红光发射器件的最大光通量和发光效率分别高达274 lm和54 lm W−1。非凡的光学性能与经济且创新的制备方法相结合表明，Mg2Al4Si5O18:Eu2+复合荧光粉将为高功率固态照明的发展迈出重要一步。
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 (λex = 450 nm, λem = 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.
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影响因子：
2.7
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