An efficient far-red emission Sr2InSbO6:Mn4+, M (M = Li+, Na+, and K+) phosphors for plant cultivation LEDs
An efficient far-red emission Sr2InSbO6:Mn4+, M (M = Li+, Na+, and K+) phosphors for plant cultivation LEDs
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用于植物栽培 LED 的高效远红发射 Sr2InSbO6:Mn4 、M（M = Li、Na 和 K）荧光粉
DOI：
10.1111/jace.18115
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发表时间：
2022
影响因子：
3.9
通讯作者：
Ruijin Yu
中科院分区：
文献类型：
--
作者：
Yan Xie;Xue geng;Yuan Wang;Jiang Guo;Yuhui Lu;Qiuyi Lv;Zhijiang Ma;Dan Zhang;Jin Zhao;Bin Deng;Ruijin Yu
基于Mn 4+掺杂无机发光材料的高效远红光荧光粉有利于植物栽培。然而，Mn 4+掺杂的氧化物磷光体具有低量子效率的共同问题。碱金属离子共掺杂可以有效地改善Mn 4+激活的氧化物荧光粉的发光性能。本文中，首先合成了一系列共掺杂碱金属离子的Sr 2 InSbO 6：Mn 4+，M（SISO：Mn 4+，M）（M = Li+、Na+和K+）远红光发射磷光体。密度泛函理论计算表明，SISO是一种间接带隙材料，带隙约为1.60 eV。SISO：Mn 4+样品在698 nm和365 nm处显示出远红光，这与植物的远红光光敏色素（Pfr）的吸收光谱完全匹配。SISO：Mn ~（4+）样品的掺杂浓度为0.006 mol.结合Dexter理论和Inokuti-Hirayama模型，将浓度猝灭机理定义为偶极-偶极相互作用。通过优化烧结温度和碱金属离子（Li+、Na+、K+）的共掺杂可以提高SISO：Mn 4+的发光强度。最佳烧结温度为1300°C。SISO：0.006Mn ~（4+）和SISO：0.006Mn ~（4+），0.006Li ~+荧光粉的内量子效率分别为22.67%和60.56%。SISO：基于Mn 4+、Li+荧光粉的植物生长发光二极管（LED）表现出出色的光学稳定性和较长的使用寿命。因此，这些磷光体是用于植物栽培LED的有希望的候选者。
High‐efficiency and far‐red light phosphors based on Mn4+‐doped inorganic luminescence materials are beneficial to plant cultivation. However, Mn4+‐doped oxide phosphors have a common problem of low quantum efficiency. Alkali metal ion codoping can effectively improve the luminescence properties of Mn4+‐activated oxide phosphors. Herein, a series of Sr2InSbO6:Mn4+, M (SISO:Mn4+, M) (M = Li+, Na+, and K+) far‐red‐emitting phosphors codoped alkali metal ions were first synthesized. Density functional theory calculation indicated that SISO is a kind of indirect bandgap material with a bandgap of ∼1.60 eV. The SISO:Mn4+samples showed a far‐red light at 698 nm upon 365 nm, which perfectly matched the absorption spectrum of the far‐red‐phytochrome (Pfr) of plants. The doping concentration of the SISO:Mn4+samples was optimized to be 0.006 mol. The concentration quenching mechanism was defined as dipole–dipole interaction by combining the Dexter theory and the Inokuti–Hirayama model. Optimizing the sintering temperature and codoped with alkali metal ions (Li+, Na+, and K+) could improve the luminescent intensity of SISO:Mn4+. The optimum sintering temperature was 1300°C. The internal quantum efficiencies of SISO:0.006Mn4+and SISO:0.006Mn4+, 0.006Li+phosphors are 22.67% and 60.56%, respectively. SISO:Mn4+, Li+phosphors‐based plant growth light‐emitting diodes (LEDs) demonstrate excellent optical stability and long lifetime. Thus, these phosphors are promising candidates for plant cultivation LEDs.