Controlled Superstructures in vacuum-deposited Organic Semiconductors

有机半导体薄膜器件的功能在很大程度上取决于薄膜的微结构和分子的取向。一方面，这对这一领域提出了挑战，另一方面，将具有不同功能和结构性质的材料组合在一个单一设备中的能力是分子系统所独有的，并提供了大量迄今尚未被充分利用的机会。本项目的目标是研究分子混合物的微观结构，并找到有利于分离分子、超结构和相分离结构域的制度。应用的重点是分子自旋电子学和有机太阳能电池，给出了相似的材料系统和表征技术，但不同的微观结构要求。博士生将能够使用一系列独特的原位和非原位表征技术来确定薄膜生长和沉积后的微结构，从而将微结构与器件性能关联起来。鉴于许多有机电子器件的微结构和器件性能之间的密切联系，我们看到许多与其他PE-CDT研究项目和有机电子研究领域的协同效应，以及对行业合作伙伴的高度相关性。

The functionality of organic semiconductor thin film devices depends in most cases to a significant way on the microstructure of the film and the orientation of the molecules. One the one hand, this poses a challenge on the field, on the other hand, the ability to combine materials with very different functional and structural properties in a single device is unique to molecular systems and presents a wealth of opportunities that have so far not been fully exploited.The goal of this project is to investigate the microstructure of molecular blends and to find ways to obtain regimes favouring isolated molecules, superstructures and phase separated domains. The application focus is on molecular spintronics and organic solar cells, given similar material systems and characterisation techniques, but different microstructural requirements. The PhD student will be able to employ a range of unique in-situ and ex-situ characterisation techniques to determine the microstructure during thin film growth and post-deposition to correlate microstructure with device properties.Given the close connection of microstructure and device performance for many organic electronics devices, we see many synergies with other PE-CDT research projects and areas of research in organic electronics, as well as high relevance for industry partners.