MRI: Development of a Scanning Probe Microscopy Tool to Study Nanoscale Photoactivated Processes

MRI：开发扫描探针显微镜工具来研究纳米级光激活过程

• 批准号: 0923115
• 负责人: Venkat Bommisetty
• 金额: $ 45.14万
• 依托单位: South Dakota State 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: 2009-10-01 至 2013-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0923115&HistoricalAwards=false
• 关键词: MRI; Development; Scanning; Probe; Microscopy

0923115BommisettySouth Dakota State U."This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)."Technical Summary: Fundamental understanding of relationship between nanoscale structure and optoelectronic properties of photovoltaic materials is important to improve the efficiency of solar cells. Several experimental tools can measure the nanoscale topography and optoelectronic properties independently. The proposed effort aims to develop a scanning probe microscopy tool that can measure both topographical and optoelectronic properties simultaneously, thereby providing critical information needed to connect these two quantities. The proposed tool measures the topography, surface potential, surface photovoltage (SPV) and SPV spectroscopy with nanometer spatial resolution. These measurements help estimating the minority carrier diffusion length and carrier life time with high spatial resolution in nanostructured photovoltaic materials that is critical to understand charge transport processes in Gen-2 and Gen-3 solar cells. This tool will strengthen the proposing group?s collaboration with industrial partners, whose needs are focused on improvement in solar cells, thereby facilitating regional economic growth. The proposed tool will provide strong interdisciplinary training to several graduate and undergraduate students from SDSU and other research universities in the state, providing highly skilled manpower in the region. The proposed collaborative effort with the SPM division of Agilent Inc has strong potential to develop into a commercial product that will have much broader benefits to the research community. Proposed effort will also strengthen the PI?s support for attracting under-represented groups (Native Americans and women) into higher education, specifically in science and engineering.Layman Summary: Development of low cost solar cells technologies that can efficiently convert sun light into energy is important for national energy independence and environmental protection. Current solar cells are based on high quality crystalline silicon and are expensive. Significant reduction in the cost of solar energy conversion can be achieved by developing new technologies that can efficiently convert the sunlight into energy. Development of low cost photovoltaic technologies, such as organic solar cells, dye-sensitized solar cells, thin film solar cells, require significant improvement in the fundamental understanding of nanoscale optoelectronic properties and associated charge transport processes. Proposed scanning probe microscope tool measures topography and optoelectronic properties with nanoscale resolution. This data will help several research groups within the state of South Dakota to develop novel solar cells. Proposed tool will help accelerating the development of new photovoltaic materials and strengthens the PhD program in electrical engineering at SDSU and introduces a new multidisciplinary course. Proposed effort includes several outreach programs to broaden the participation of Native Americans and women in higher education at SDSU.

0923115 bommisett南达科他州美国“这项奖励是根据2009年美国复苏和再投资法案（公法111-5）资助的。”技术综述：了解光伏材料的纳米结构与光电性能之间的关系对提高太阳能电池的效率具有重要意义。几种实验工具可以独立测量纳米级形貌和光电子特性。提出的努力旨在开发一种扫描探针显微镜工具，可以同时测量地形和光电子特性，从而提供连接这两个量所需的关键信息。该工具以纳米空间分辨率测量形貌、表面电位、表面光电压（SPV）和SPV光谱。这些测量有助于以高空间分辨率估计纳米结构光伏材料中的少数载流子扩散长度和载流子寿命，这对于理解第2代和第3代太阳能电池中的电荷输运过程至关重要。这个工具将加强提议组？美国与工业伙伴的合作，他们的需求集中在改进太阳能电池，从而促进区域经济增长。拟议的工具将为来自SDSU和该州其他研究型大学的研究生和本科生提供强大的跨学科培训，为该地区提供高技能人才。拟议的与安捷伦公司SPM部门的合作努力具有强大的潜力，可以发展成商业产品，为研究界带来更广泛的利益。拟议的努力也将加强PI？支持吸引代表性不足的群体（印第安人和妇女）进入高等教育，特别是在科学和工程领域。摘要：开发低成本的太阳能电池技术，有效地将太阳光转化为能量，对国家能源独立和环境保护具有重要意义。目前的太阳能电池以高质量的晶体硅为基础，价格昂贵。通过开发能够有效地将太阳光转化为能量的新技术，可以显著降低太阳能转换的成本。低成本光伏技术的发展，如有机太阳能电池、染料敏化太阳能电池、薄膜太阳能电池，需要显著提高对纳米级光电特性和相关电荷传输过程的基本理解。提出了一种扫描探针显微镜工具，以纳米级分辨率测量形貌和光电子特性。这些数据将帮助南达科他州的几个研究小组开发新型太阳能电池。提出的工具将有助于加速新型光伏材料的开发，加强SDSU电气工程博士课程，并引入新的多学科课程。提议的努力包括几个外展项目，以扩大美国原住民和妇女在SDSU高等教育中的参与。