Fluorescence, Phosphorescence, Thermoluminescence and charge transfer in synthetic diamond

人造金刚石的荧光、磷光、热释光和电荷转移

• 批准号: 1952288
• 金额: --
• 依托单位: University of Warwick
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1952288
• 关键词: Fluorescence; Phosphorescence; Thermoluminescence; charge; transfer

Fluorescence and Phosphorescence underpin many of the discrimination techniques use to separate natural from synthetic diamond and these physical processes are at the heart of many new photonic and quantum technologies based on colour centres in diamond. In HPHT synthetic diamond the phosphorescence observed is explained in terms of donor-acceptor pair recombination. This is undoubtedly correct, and the thermal activation of electrons to neutral boron acceptors shows that boron plays a key role. However, there are a number of things that we struggle to explain. The phosphorescence peak positions are not explained, there is no conclusive link between the emission and charge transfer involving the nitrogen donor, and the role of other defects in quenching the luminescence. Furthermore, in diamonds grown by chemical vapour deposition, and subsequently treated (e.g. high pressure high temperature annealing, irradiated and annealed, etc.) there is unexplained fluorescence and phosphorescence. This project will use photoluminescence, phosphorescence and thermoluminescence, allied with quantitative measurements of defect and impurity content and theory, to investigate the defects involved and the underlying mechanisms of luminescence in synthetic diamond.

荧光和磷光是许多用于将天然与合成钻石区分开的歧视技术的基础，这些物理过程是基于钻石颜色中心的许多新的光子和量子技术的核心。在HPHT合成钻石中，观察到的磷光是用供应者对的重组来解释的。这无疑是正确的，并且电子向中性硼受体的热激活表明硼扮演着关键作用。但是，我们很难解释很多事情。没有解释磷光峰位置，涉及氮供体的发射和电荷转移之间没有结论性的联系，以及其他缺陷在淬火中的作用。此外，在化学蒸气沉积生长的钻石中，随后处理（例如高压高温退火，辐照和退火等），有无法解释的荧光和磷光。该项目将使用光致发光，磷光和热发光，并与缺陷和杂质含量和理论进行定量测量，以研究合成钻石中所涉及的缺陷以及发光的潜在机制。