Surface-specific visible light luminescence from composite metal oxide nanocrystals
Surface-specific visible light luminescence from composite metal oxide nanocrystals
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DOI：
10.1007/s10853-015-9393-2
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发表时间：
2015-12-01
影响因子：
4.5
通讯作者：
Diwald, Oliver
中科院分区：
文献类型：
--
作者：
Sternig, Andreas;Bernardi, Johannes;Diwald, Oliver
金属氧化物纳米颗粒上的低配位表面元素代表了由丰富、无毒和热稳定材料制成的发光纳米颗粒新概念的基础。本实验与理论相结合的研究描述了Ba掺杂MgO纳米颗粒表面的生成和稳定性，以及它们的光学吸收和发光对Ba负载的依赖。结果表明，本文采用的气相生长工艺代表了一种特别可靠的合成方法，用于在蓝黄光范围内具有可重复调节的光致发光发射特性的颗粒粉末。此外，这种深入的表征还提供了对这种纳米颗粒材料的电子和光学特性的理解，这种材料在基于紫外光下转换的固态光应用中具有迄今为止未被注意到的潜力。
Low-coordinated surface elements on metal oxide nanoparticles represent the basis for a new concept of luminescent nanoparticles made of abundant, non-toxic, and thermally stable materials. This combined experimental and theoretical study describes the generation and stability of Ba-doped MgO nanoparticle surfaces and their optical absorption and luminescence dependence on Ba loading. It is demonstrated that the vapor phase growth process employed here represents a particularly robust synthesis approach for particle powders with reproducibly adjustable photoluminescence emission properties in the range between blue and yellow light. Moreover, this in-depth characterization also provides an understanding of the electronic and optical characteristics of this nanoparticulate material with a so far unnoticed potential for solid-state light applications that are based on down conversion of UV light.