Single-Molecule Spectroscopy on Polythiophene Conjugated Polymers and Aggregates: Towards Structure - Function Relationships

聚噻吩共轭聚合物和聚集体的单分子光谱：结构-功能关系

• 批准号: 230137142
• 负责人: Professor Dr. Richard Hildner
• 金额: --
• 依托单位: Faculty of Science and Engineering
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/230137142?language=en
• 关键词: Single; Molecule; Spectroscopy; Polythiophene; Conjugated

Polythiophene p-conjugated polymers are a very popular class of organic functional materials and are exploited in novel optoelectronic devices, such as photovoltaic cells and field-effect transistors. Despite the successful applications of this conjugated polymer its electronic structure is still not fully understood. In particular the character of the electronically excited states is subject to discussion. In this project we will employ complementary single-molecule techniques, i.e. fluorescence and fluorescence excitation spectroscopy as well as time-resolved spectroscopy, to study the photophysical properties of individual polythiophene chains as a function of their length, their local environment, their conformation, and the temperature. This will allow to unravel clear correlations between the electronic and geometric properties of this technologically highly relevant material class. Finally, we will also investigate the photophysics of single polythiophene aggregates, that play an important role for the performance of organic devices. Here the aim will be to reveal the subtle interplay between intra- and inter-chain interactions that is key to understand (charge and energy) transport processes within and between such aggregates.

聚噻吩P-偶联的聚合物是非常流行的有机功能材料类，并在新型的光电设备（例如光伏细胞和现场效应晶体管）中被利用。尽管这种共轭聚合物成功地应用了其电子结构，但仍未完全了解。特别是电子激发态的特征是进行讨论的。在这个项目中，我们将采用互补的单分子技术，即荧光和荧光激发光谱以及时间分辨光谱，以研究单个聚噻吩链的光物理特性随着其长度的作用，其本地环境，其构象和温度。这将使该技术高度相关的材料类别的电子和几何特性之间的明显相关性。最后，我们还将研究单个聚噻吩聚集体的光体物理学，这对于有机设备的性能起着重要作用。在这里，目的是揭示链内和链间相互作用之间的微妙相互作用，这些相互作用是理解（电荷和能量）运输过程和此类骨料之间的关键。