Mn⁴⁺, Eu³⁺ co-doped magnesium lanthanum potassium tungstate (KLaMgWO₆) phosphors have been prepared by a high-temperature solid-state reaction method. Partial substitution of K⁺ sites with La³⁺ and Li⁺ in the A site of KLaMgWO₆: Mn⁴⁺ results in 9.7 times and 7.4 times increase in the intensity of Mn⁴⁺ emission at 697 nm under blue light excitation, respectively. Strong emission of Eu³⁺ (613 nm) is observed in the Mn⁴⁺, Eu³⁺ co-doped K_0.3La_1.233MgWO₆ without weakening the emission of Mn⁴⁺, and the total emission intensity of the Mn⁴⁺, Eu³⁺ co-doped sample is enhanced by about 40% as compared with that of K_0.3La_1.233MgWO₆:0.006Mn⁴⁺. More importantly, the fluorescence intensity ratio (I_Mn/I_Eu) in the Mn⁴⁺, Eu³⁺ co-doped K_0.3La_1.233MgWO₆ phosphor increases monotonously not only with temperature but also with excitation wavelength within a certain range. The unique characteristics of the Mn⁴⁺, Eu³⁺ co-doped K_0.3La_1.233MgWO₆ phosphor might provide a lot of possible application including plant growth lighting, optical temperature sensing, and wavelength detection.

中文翻译：

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Mn ⁴⁺，Eu ³⁺共掺杂K _0.3 La _1.233 MgWO ₆：一种潜在的多功能发光材料

通过高温固态反应方法制备了Mn ⁴⁺，Eu ³⁺共掺杂钨酸镧镧镁（KLaMgWO ₆）荧光粉。在KLaMgWO ₆：Mn ⁴⁺的A位点中，用La ³⁺和Li ⁺部分取代K ⁺位点，导致在蓝光激发下697 nm处Mn ⁴⁺发射强度分别增加9.7倍和7.4倍。在Mn ⁴⁺，Eu ³⁺共掺杂的K _0.3 La _1.233 MgWO _6中观察到Eu ³⁺（613 nm）的强发射。与K _0.3 La _1.233 MgWO ₆：0.006Mn ⁴⁺相比，共掺杂样品中Mn ⁴⁺，Eu ³⁺的总发射强度提高了约40％，而不会削弱Mn ⁴⁺的发射。更重要的是，Mn ⁴⁺，Eu ³⁺共掺杂的K _0.3 La _1.233 MgWO ₆荧光粉中的荧光强度比（I _Mn / I _Eu）不仅随温度而且在一定范围内的激发波长单调增加。锰的独特特性⁴⁺，Eu ³⁺共掺杂的K _0.3 La _1.233 MgWO ₆荧光粉可能提供许多可能的应用，包括植物生长照明，光学温度感测和波长检测。