通过铋激活的发红光晶体的拓扑异构还原实现的近红外发光磷光体
Near-infrared luminescent phosphors enabled by topotactic reduction of bismuth-activated red-emitting crystals
摘要：
铋掺杂发光材料由于其在通信、生物医学、显示等领域的巨大应用潜力，近年来受到了广泛的关注。然而，这些材料的受控合成，特别是那些在近红外（NIR）发光的材料，仍然是一个具有挑战性的课题。在这里，我们表明，低温topotactic还原，通过使用Al金属粉末作为吸氧剂，可以采用作为一个强大的技术，用于转换的铋掺杂的红色发光系统到近红外发射表兄弟作为一个独特的晶体网络的创建结果。彻底的实验表征表明，主机的框架氧可以拓扑提取，从而产生独特的金属-氧-金属网络中的还原相，同时保持前体的晶体结构。我们预计，这种低温拓扑结构的还原策略可以应用于开发更新颖的Bi掺杂的发光材料，以各种形式，可以找到广泛的功能应用。
英文摘要：
Bismuth-doped luminescent materials have gained significant attention in the past years owing to their huge potential for the applications in telecommunications, biomedicine, and displays. However, the controlled synthesis of these materials, in particular for those luminescing in the near-infrared (NIR), remains a challenging subject of continuous research effort. Herein, we show that the low-temperature topotactic reduction by using Al metal powders as oxygen getters can be adopted as a powerful technique for the conversion of bismuth-doped red-emitting systems into NIR-emitting cousins as a result of the creation of unique crystalline networks. Thorough experimental characterization indicates that the framework oxygen of hosts can be topotactically extracted, thus producing unique metal-oxygen-metal networks in the reduced phases while preserving the crystalline structure of the precursor. We anticipate that this low-temperature topotactic reduction strategy can be applied to the development of more novel Bi-doped luminescent materials in various forms that can find a broad range of functional applications.
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