Crystal Growth of Complex Luminescent Oxides

从高温溶液中生长的晶体被用于产生具有复杂结构和期望的发光性能的新氧化物材料。 正在寻求从高温溶液进行晶体生长的几种方法，以产生用于固态照明应用的不同类别的发光材料，包括使用高温溶液来生长用于固态照明和上转换应用的新的含复合稀土的氧化物;以及使用在高度还原条件下稳定的助熔剂来晶体生长含复合Eu 2+的磷光体。此外，本研究还调查了在英国金刚石光束线上原位使用助熔剂的晶体生长过程，旨在揭示通常既未观察到也未分离的中间体的物质化以及最终产品的形成。在短期内，从现场工作中获得的信息用于优化晶体生长实验，而从长远来看，这种理解将助熔剂晶体生长从经验方法转变为更深思熟虑的过程。固态照明材料领域的重点是开发能量更高效，视觉更美观的发光磷光体。 为了完成这些任务，本科生，研究生和博士后研究人员正在接受尖端技术的培训，以使用最先进的仪器来合成和表征这些材料。 该项目为学生（包括妇女和代表性不足的少数群体）提供教育和研究培训，并帮助为学术界和工业界培养一支熟练的劳动力队伍。

Crystal growth from high temperature solutions is used to create new oxide materials with complex structures and desirable luminescent properties. Several approaches to the crystal growth from high temperature solutions are being pursued to create different classes of luminescent materials for solid-state lighting applications, including the use of high temperature solutions to grow new complex rare earth containing oxides for solid state lighting and upconversion applications; and the use of fluxes stable under highly reducing conditions for the crystal growth of complex Eu2+ containing phosphors. In addition, this research investigates the process of crystal growth in fluxes using in-situ at the Diamond beam line in the UK, aiming to reveal the materialization of intermediates that are typically neither observed nor isolated, and the formation of the final product. In the short term, the information gained from the in-situ work is used to optimize the crystal growth experiments, while in the long run this understanding transforms flux crystal growth from an empirical method to a more deliberate process.The area of solid state lighting materials is focused on the development of energetically more efficient and visually more pleasing light emitting phosphors. To accomplish these tasks, undergraduates, graduate students and postdoctoral researchers are being trained in cutting-edge techniques for synthesizing and characterizing these materials using state of the art instrumentation. This project provides education and research training to students (including women and underrepresented minorities) and helps to prepare a skilled workforce for academia and industry.