Nitridophosphates have emerged as promising host compounds in the field of solid‐state lighting. Their industrial relevance has increased significantly, mainly due to recent advances in synthetic approaches under medium‐pressure (MP) conditions, including ammonothermal synthesis and hot isostatic pressing (HIP). In this study, we report on the synthesis and characterization of the quaternary representatives CaxLi10–2xP4N10 (x = 2, 2.7, 4) and Sr3Li4P4N10, prepared via a simplified ion exchange reaction under MP conditions, starting from the nitridophosphate‐based lithium ion conductor Li10P4N10. The synthesis route allowed for the preservation of the anionic [P4N10]10– structural motif of the starting material, while simultaneously introducing potential doping sites for Eu2+ by incorporating divalent alkaline earth cations (Ca2+/Sr2+). Upon excitation of Eu2+ doped samples with blue light, strong luminescence due to parity‐allowed 4f6(7F)5d1→4f7(8S7/2) transition can be observed in the red (Ca2Li6P4N10:Eu2+: λmax = 626 nm), yellow/orange (Ca2.7Li4.6P4N10:Eu2+: λmax1 = 506 nm, λmax2 = 592 nm and Sr3Li4P4N10:Eu2+: λmax = 596 nm) and green (Ca4Li2P4N10:Eu2+: λmax = 546 nm) spectral regions of the visible light. The compounds presented, together with the simplified synthetic approach, demonstrate the significant potential of ion exchange on Li ion conductors for the development of novel nitridophosphates in the future.

中文翻译：

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金刚烷型次氮基磷酸盐荧光粉 AExLi10–2xP4N10：Eu2+通过中压离子交换反应


次氮基磷酸酯已成为固态照明领域有前途的宿主化合物。它们的工业相关性显着增加，这主要是由于中压 （MP） 条件下合成方法的最新进展，包括单热合成和热等静压 （HIP）。在这项研究中，我们报告了四元代表 CaxLi10-2xP4N10 （x = 2， 2.7， 4） 和 Sr3Li4P4N10 的合成和表征，这些四元代表在 MP 条件下通过简化离子交换反应制备，从基于次氮磷酸盐的锂离子导体 Li10P4N10 开始。合成路线允许保留起始材料的阴离子 [P4N10]10– 结构基序，同时通过掺入二价碱土阳离子 （Ca2+/Sr2+） 引入 Eu2+ 的潜在掺杂位点。当用蓝光激发 Eu2+ 掺杂样品时，在可见光的红色（Ca2Li6P4N10：Eu2+：λmax = 626 nm）、黄色/橙色（Ca2.7Li4.6P4N10：Eu2+：λmax1 = 506 nm、λmax2 = 592 nm 和 Sr3Li4P4N10：Eu2+：λmax = 596 nm）光谱区域中可以观察到奇偶校验允许的 4f6（7F）5d1→4f7（8S7/2） 跃迁引起的强发光。所提出的化合物与简化的合成方法一起，证明了锂离子导体上的离子交换在未来开发新型次氮磷酸盐方面的巨大潜力。