RUI: Investigation of Surface Loss Processes in Nano-scale Luminescent Materials

RUI：纳米级发光材料表面损失过程的研究

• 批准号: 0906992
• 负责人: Anthony Diaz
• 金额: $ 14.55万
• 依托单位: Central Washington University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-01 至 2013-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0906992&HistoricalAwards=false
• 关键词: RUI; Investigation; Surface; Loss; Processes

Technical. This project, at a predominately undergraduate institution, involves the study of electron-hole (e-h) pair transport and trapping processes in nano-scale (50-500 nm) solid-state luminescent materials under vacuum ultraviolet (VUV) excitation. The approach is to conduct a systematic spectroscopic investigation of materials of controlled particle size, and evaluation of this data in the context of accepted models. The analysis and modeling of the data is expected to provide an assessment of the mobility of e-h pairs in a given host, as well as the degree to which absorbed energy is lost at the particle surface. These measurements are also able to distinguish bulk energy loss effects from those involving migration to the surface. Such differentiation is important to the development of efficient nanoscale optical materials that have an intrinsically high surface area. Initial research focus will be on the well characterized and technologically important materials, Y2O3 and YBO3. The goal is to obtain greater fundamental understanding of how surface energy losses are related to the structure and composition of nanomaterials.Non-Technical. The project addresses fundamental research issues in a topical area of electronic/photonic materials science having technological relevance. Developing a detailed understanding of electron transport processes in solids is important to a wide variety of fields within materials science, including the study of scintillators, two-photon phosphors, dye-sensitized solar cells and transparent conductors. It is the objective of the principal investigator to sustain a rigorous research program with undergraduate students at Central Washington University comprising the bulk of the investigative team. This will provide students with deeper and broader training, expose them to interesting research topics early in their academic careers, and serve as excellent preparation for graduate school or future professional endeavors.

技术.该项目在一个主要的本科院校进行，涉及真空紫外（VUV）激发下纳米级（50-500 nm）固态发光材料中电子-空穴（e-h）对传输和捕获过程的研究。该方法是进行控制粒度的材料的系统的光谱调查，并在接受的模型的背景下，此数据的评估。数据的分析和建模预计将提供一个给定的主机中的电子-氢对的流动性的评估，以及在颗粒表面的吸收能量损失的程度。这些测量也能够区分散装能量损失的影响，从那些涉及迁移到表面。这种差异对于开发具有固有高表面积的高效纳米级光学材料是重要的。最初的研究重点将放在具有良好特性和技术重要性的材料Y2 O3和YBO 3上。目标是更深入地了解表面能损失与纳米材料的结构和组成之间的关系。非技术性。该项目解决了具有技术相关性的电子/光子材料科学主题领域的基础研究问题。发展对固体中电子输运过程的详细理解对材料科学中的各种领域都很重要，包括对发光体、双光子荧光粉、染料敏化太阳能电池和透明导体的研究。主要研究者的目标是与中央华盛顿大学的本科生一起维持严格的研究计划，这些学生组成了大部分的研究团队。这将为学生提供更深入和更广泛的培训，让他们在学术生涯的早期就接触到有趣的研究课题，并为研究生院或未来的专业努力做好准备。