Collaborative Proposal: Designer Glass Ceramics

合作提案：设计师玻璃陶瓷

• 批准号: 1600783
• 负责人: Jacqueline Johnson
• 金额: $ 31.98万
• 依托单位: University of Tennessee Space Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-07-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1600783&HistoricalAwards=false
• 关键词: Collaborative; Proposal; Designer; Glass; Ceramics

Non-technical Description: This research creates special coatings for solar cells that increase the amount of the sun's energy that the cells can use, making them more efficient. The coatings also help reduce heating of the solar cells, which wastes energy. These coatings can be used with currently-available solar cell materials, enabling more attractive viability as a commercial product. The coatings may also be applied to light emitting diodes, helping control the color of light over a wide temperature range. Although not the focus of this investigation, the coatings have additional applications in medical X-ray imaging, non-destructive evaluation and homeland security. These research efforts are integrated with educational activities exposing graduate students to real world problems of energy saving as well as the full academic experience of information dissemination in the form of writing papers and presenting research, travel, grant writing and teaching. As part of the outreach activities, a summer internship is available for high school and undergraduate students, which gives a small number of students, each year, the opportunity to learn more about scientific research, perform experiments, give presentations, and participate in many other aspects of a scientific career. Technical Description: The aim of this activity is to develop novel 'designer' glass ceramics based on a modified fluorozirconate glass composition, and to explore their luminescence behavior. The ultimate goal is to gain insights leading to optimization of these designer nanocomposites for applications as wavelength shifters pertaining to up- and down-converters in solar cells and light emitting diodes. Pulsed laser deposition is used to synthesize layered nanocomposite materials so that very fine control of the distribution of the optically-active dopant and the nanocrystalline structure responsible for the optical behavior is achieved, leading to the development of a glass ceramic with enhanced light output. Systematic studies of optical behavior, as a function of parameters such as the designed distribution of the optically-active component layers within the glass matrix and the relative concentrations of optical dopants and nanocrystals, enable an understanding of how energy transfer between the luminescent dopant atoms and the nanocrystals (and thus the optical efficiency) can be controlled. The combination of in situ¬ transmission electron microscopy, ellipsometry and X-ray diffraction enables the structure-property relationships to be visualized and linked together. For example, critical control over optimum dopant position can be achieved by studying the diffusion paths of the dopants during in situ heating.

非技术描述：这项研究为太阳能电池创建了特殊的涂料，以增加电池可以使用的太阳能量的量，从而更有效。涂料还有助于减少浪费能量的太阳能电池的加热。这些涂料可与当前可用的太阳能电池材料一起使用，从而使其具有更具吸引力的生存能力作为商业产品。涂料还可以应用于发光二极管，有助于控制宽温度范围内的光的颜色。尽管不是这项调查的重点，但涂料在医疗X射线成像，非破坏性评估和国土安全方面还有其他应用。这些研究工作与教育活动融合，使研究生遇到了节能的现实世界问题，以及以撰写论文并介绍研究，旅行，授予写作和教学的形式传播信息传播的全部学术经验。作为外展活动的一部分，可以为高中和本科生提供暑期实习，这使少数学生每年都有机会了解更多有关科学研究，进行实验，进行演讲并参与科学职业的许多其他方面。技术描述：此活动的目的是基于改良的氟氯酸酯玻璃成分开发新颖的“设计师”玻璃陶瓷，并探索其发光行为。最终目标是获得洞察力，从而使这些设计器纳米复合材料优化，以作为与太阳能电池和光发射中的上和下连接器有关的波长变速器的应用。脉冲激光沉积用于合成分层的纳米复合材料，因此可以很好地控制光掺杂剂的分布和负责光学行为的纳米晶体结构，从而导致开发具有增强光输出的玻璃陶瓷。光学行为的系统研究是参数的函数，例如玻璃基质中光活性组件层的设计分布以及光掺杂剂和纳米晶体的相对浓度，从而可以理解对发光掺杂剂原子与纳米晶体之间的能量传递（以及光学效率）（以及光学效率）。位置透射电子显微镜，椭圆法和X射线衍射的组合使结构 - 繁星关系可以可视化并链接在一起。例如，可以通过研究原位加热期间掺杂剂的扩散路径来实现对最佳掺杂位置的关键控制。