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Amorphous Si_3B_3N_7 Ceramic as a Versatile Host for Inorganic Phosphor Activators

机译:非晶态Si_3B_3N_7陶瓷,可作为无机磷活化剂的多功能基质

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摘要

Among the inorganic phosphors used in advanced lighting technologies, rare-earth doped nitridosilicates have attracted significant attention because they exhibit superior photoluminescence properties in connection with high thermal, chemical, and mechanical stabilities. All of these materials are crystalline, which imposes substantial limitations in discovering new phosphors, since the activators to be included in the host matrix need to comply closely with the respective lattice sites, at least with respect to charge and size. As an approach to overcome such implications, an amorphous matrix, namely Si_3B_3N_7, is suggested as a universal nitride-based host accessible to (co)dope various activators, e.g., Eu~(2+), Ce~(3+) and Tb~(3+). Unlike crystalline phosphors, in the amorphous Si_3B_3N_7 matrix, activator ions do not replace any atom from the random network host; instead, they act as network modifiers. The synthesis of this new class of amorphous phosphors is based on a precursor route, enabling high purities, and avoiding harsh temperature treatments.
机译:在先进的照明技术中使用的无机磷光体中,稀土掺杂的氮硅酸盐硅酸盐由于具有出色的光致发光特性以及高的热,化学和机械稳定性而备受关注。所有这些材料都是结晶的,这在发现新的磷光体方面施加了实质性限制,因为要包含在主体基质中的活化剂至少在电荷和尺寸方面需要与各个晶格位点紧密结合。作为一种克服这种影响的方法,有人建议将非晶基质(即Si_3B_3N_7)作为通用的基于氮化物的基质,可通过(共)掺杂各种活化剂(例如Eu〜(2 +),Ce〜(3+)和Tb)来实现。 〜(3+)。与结晶磷光体不同,在非晶Si_3B_3N_7基体中,活化剂离子不会取代随机网络主体中的任何原子;相反,它们充当网络修改器。这类新的非晶态磷光体的合成基于前体路线,可实现高纯度并避免进行苛刻的温度处理。

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  • 来源
    《Advanced Functional Materials》 |2014年第4期|460-464|共5页
  • 作者

    Hasan Cakmak; Martin Jansen;

  • 作者单位

    Max Planck Institute for Solid State Research Heisenbergstr. 1, 70569, Stuttgart, Germany;

    Max Planck Institute for Solid State Research Heisenbergstr. 1, 70569, Stuttgart, Germany;

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