"Living" conjugated polymers: a new approach in engineering of complex materials for needs of organic electronics

半导体聚合物是制作聚合物太阳能电池、有机发光二极管或有机场效应管的极具前景和潜在低成本的材料。最先进的聚合物化学并不能完全满足在有机电子器件中应用所需的潜水器和复杂共轭材料的要求。为了实现更高的效率，并提高材料的重现性和器件性能，共轭聚合物必须具有可控的结构和链拓扑结构。合成结构明确的共轭嵌段共聚物(BCP)被认为是目前控制全聚合物有机光伏器件中有源层形态的最有前途的方法之一。本项目旨在通过二酮基吡咯吡咯和异吲哚基受体单体与噻吩基供体单体的连续活性Kumada缩聚反应合成全共轭的供体-受体嵌段共聚物。这些任务将通过详细的机理研究和明智的聚合条件优化来实现。所得共聚物的自组装(即相分离和结晶行为)和光电性能将被广泛研究，并将最终测试它们在光电子器件中的应用前景。

Semi-conducting polymers are highly promising and potentially low cost materials for polymer solar cells, organic light emitting diodes or organic field-effect transistors. State-of-the-art polymer chemistry does not fully satisfy requirements in divers and complex conjugated materials that need to be fulfilled for the application in organic electronic devices. In order to achieve higher efficiencies and also to enhance reproducibility of materials and device properties, conjugated polymers must have a controllable structure and chain topology. The synthesis of well-defined conjugated block copolymers (BCP) is currently seen as one of the most promising approach to control morphology of the active layer in all-polymer organic photovoltaic devices. This projects aims at synthesizing all-conjugated donor-acceptor block copolymers by sequential living Kumada polycondensation of either diketopyrrolopyrrole- and isoindigo-based acceptor monomers and thiophene-based donor monomers. These tasks will be realized through detailed mechanistic investigations and judicious optimization of the polymerization conditions. The self-assembly (i.e., phase-segregation and crystallization behavior) and the optoelectronic properties of the obtained copolymers will be extensively investigated, and the perspectives of their use in optoelectronic devices will finally be tested.