Charger transfer at interfaces studied with non-linear infrared probes

使用非线性红外探头研究界面上的电荷转移

• 批准号: 1012380
• 负责人: Martin Zanni
• 金额: $ 40.32万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1012380&HistoricalAwards=false
• 关键词: Charger; transfer; interfaces; studied; non

In this project, funded by the Chemical Structure, Dynamics and Mechanisms program of the NSF Chemistry Division, Professor Martin Zanni from the University of Wisconsin-Madison will utilize two-dimensional infrared (2D IR) and heterodyned sum-frequency generation (SFG) spectroscopies to study electron transfer across molecule/semiconductor interfaces. This process is one of the most fundamental aspects of solar-to-electrical and solar-to-fuel conversion processes, but is still not fully understood largely due to the difficulties in characterizing molecular structures at interfaces. These techniques will be used to resolve multiple dye conformations, map their individual kinetics by measuring the time-dependence of their respective cross peaks, and determine their conformations by measuring the angles of molecular bonds on single crystal interfaces. The broader impacts of this proposal include the training of undergraduates and graduate students in this multi-disciplinary field, the dissemination of our results at national ACS meetings and through refereed publications, and the development of a website to make it easy and efficient to keep up-to-date on developments in multidimensional spectroscopy. The goal is to provide a level of molecular detail not previously attainable for interfacial charge transfer, thereby leading to a better understanding of charge separation and transfer at molecule-semiconductor interfaces that is necessary for the rational design of organic dye- and quantum-dot sensitized solar and fuel cells.

在这个由NSF化学部化学结构，动力学和机制计划资助的项目中，来自威斯康星大学麦迪逊分校的Martin Zanni教授将利用二维红外（2D IR）和外差和频发生（SFG）光谱来研究分子/半导体界面之间的电子转移。 这一过程是太阳能-电力和太阳能-燃料转换过程中最基本的方面之一，但仍然没有完全理解，主要是由于在界面处表征分子结构的困难。 这些技术将被用来解决多种染料构象，通过测量其各自的交叉峰的时间依赖性映射其各自的动力学，并通过测量单晶界面上的分子键的角度来确定其构象。 这项建议的更广泛的影响包括在这个多学科领域的本科生和研究生的培训，我们的结果在国家ACS会议上的传播，并通过参考出版物，以及一个网站的开发，使其容易和有效地保持最新的发展在多维光谱。 我们的目标是提供一个层次的分子细节以前无法达到的界面电荷转移，从而导致更好地了解电荷分离和转移在分子-半导体界面，这是必要的有机染料和量子点敏化太阳能和燃料电池的合理设计。