Electronic properties of polymers and organic crystals (EPPOC)

有机半导体正在成为一种非常强大的电子技术，用于柔性显示器和低成本印刷电路。然而，它们的电荷输运物理和最终性能限制还没有得到很好的理解。拟议项目的目标是在大阪和剑桥有机电子组之间建立紧密的合作，以便深入了解共轭聚合物和分子晶体的器件物理之间的关系。我们将使用大阪和剑桥团队已经提供的技术对这两个系统进行广泛的直接可比实验，以了解这两个系统的电荷输运物理的异同。这将包括对高迁移率聚合物半导体进行首次霍尔效应和磁阻测量，以与大阪已经在分子晶体上进行的测量进行比较。一个特别有趣的问题是分子晶体中的极化弛豫过程，我们将对分子晶体中的电荷诱导光吸收进行首次光谱测量，并与剑桥大学已经在聚合物上进行的测量进行比较。上述研究工作的核心将由两名博士生进行，一名注册在剑桥，另一名注册在大阪。两位学生都将密切互动，在攻读博士学位期间，他们将在另一个地方工作很长时间。参与该项目的两名博士生将获得尽可能广泛的实验表征技术，该项目将为他们提供良好的培训环境，使他们成为未来英日研究合作的领导者。

Organic semiconductors are becoming a very powerful electronic technology for applications in flexible displays and low-cost printed circuits. Their charge transport physics and ultimate performance limits are however not well understood. The objective of the proposed project is to establish an intense collaboration between the Osaka and Cambridge organic electronic groups in order to arrive at an in-depth understanding of the relationship between the device physics of conjugated polymers and molecular crystals. We will perform a broad range of directly comparable experiments on the two systems using techniques that are already available in the Osaka and Cambridge groups to understand similarities and differences in the charge transport physics of the two systems. This will include performing the first Hall effect and magnetoresistance measurements on high-mobility polymer semiconductors to compare with measurements already performed in Osaka on molecular crystals. A particularly interesting question is that of polaronic relaxation processes in molecular crystals, and we will perform the first spectroscopic measurements of charge-induced optical absorptions in molecular crystals and compare with those already performed on polymers in Cambridge. The core of the research work outlined above will be carried out by two PhD students, one registered in Cambridge, the other one registered in Osaka. Both students will interact with each other very closely, and will spend significant time during their PhD working in the other location. The two PhD students working on the project will have available the widest possible spectrum of experimental characterisation techniques, and the project will provide an excellent training environment for them to become leaders in future UK-Japan research collaborations.