Eu³⁺-doped KY₃F₁₀ materials with a dopant content between 0 and 5 mol% were prepared based on the nominal composition K(Y_3-xEu_x)F₁₀ using different synthetic routes. The reaction conditions have been proven to be critical factors for the characteristics of the final products: morphology, size and crystallinity. As a result, noticeable changes in their photoluminescence spectra and lifetimes were observed. Quantum cutting processes or similar energy transfers between Eu³⁺ ions allowed obtaining high quantum efficiencies, while the analysis of the ${\mathrm{\Omega }}_2$ Judd-Ofelt parameter suggested that the crystal field of Eu³⁺ was very similar in all the compositions. A well-designed synthesis of Ln³⁺-doped fluorides can provide a full range of opportunities to explore new phenomena. Thus, this study highlights the complexity of the fluoride-based systems, which are exceptional candidates for doping with luminescent lanthanide ions and have very important characteristics for their future application in bioanalytics, biomedics or photonics. Indeed, the color-tunable emissions of the phosphors, which vary from orangish to yellow, could be interesting for their application in white light-emitting diodes through their combination with blue chips.

基于标称组成K（Y _{3- x} Eu _x）F _10，使用不同的合成路线，制备了Eu ³⁺掺杂的KY ₃ F ₁₀材料，其掺杂剂含量在0和5 mol％之间。已证明反应条件是最终产品特性的关键因素：形态，尺寸和结晶度。结果，观察到它们的光致发光光谱和寿命的显着变化。Eu ³⁺离子之间的量子切割过程或类似的能量转移可以实现高量子效率，而对${\mathrm{\Omega }}_2$Judd-Ofelt参数表明，Eu ³⁺的晶体场在所有组成中都非常相似。精心设计的Ln ³⁺掺杂氟化物的合成可以提供探索新现象的各种机会。因此，这项研究突出了基于氟化物的系统的复杂性，这是掺杂发光镧系元素离子的特殊候选物，并且对于它们将来在生物分析，生物医学或光子学中的应用具有非常重要的特征。的确，磷光体的颜色可调发射（从橙色到黄色不等）对于通过与蓝色芯片的组合在白色发光二极管中的应用可能很有趣。