New Polyelectrolytes Based on Lateral Boryl-Substitution: Synthesis, Photophysical Characterization and Application in Organic Light-Emitting Diodes

有机电致发光二极管的研究近年来一直在稳步增长，这主要是因为它具有易于加工、器件结构灵活和生产成本低的潜力。虽然利用有机电子概念的新显示器已经进入消费市场，但设备的性能和稳定性需要改进。特别是，新材料的化学定制以实现有效的电子传输并减少在有机层和电极之间的界面上的电子注入势垒有望取得未来的进展。共轭聚电解质，即具有π离域有机骨架和离子功能的聚合物，最近才被定位为一类新的电子传输/电子注入层。在拟议的项目中，将合成一种基于侧向硼取代的新型共轭聚电解质。对三配位的硼中心的亲核攻击为共轭聚电解质提供了一种简单、新的进入方式，并潜在地提供了一种微调电子注入和发射性能的手柄，从而提供了一种多功能材料。在合成之后，将研究新型聚电解质的光物理性质和在电子器件中的功能。为此，提出者将学习器件制造和表征技术。这些研究对于进一步评估共轭聚电解质在器件应用中的潜力具有重要意义。

Research into Organic Light-Emitting Diodes has been growing steadily in recent years mainly due to the potential of easy processability, flexible device architectures, and low-production costs. Although new displays utilizing the concept of organic electronics have already entered the consumer market, device performance and stability need improvement. In particular, chemical tailoring of new materials to realize efficient electron transport and to reduce barriers for electron injection at the interfaces between the organic layer and the electrodes promises future progress. Conjugated polyelectrolytes, i.e., polymers with π-delocalized organic frameworks and ionic functionalities, have only recently been targeted as a new class of such electron transport/ electron injection layers.Within the proposed project a new type of conjugated polyelectrolyte based on lateral borylsubstitution will be synthesized. Nucleophilic attack on three-coordinate boron-centers provides an easy, new entry to conjugated polyelectrolytes and potentially a handle to fine-tune electron injection and emissive properties providing a multi-functional material. Following the synthesis the photophysical properties and the function of the new polyelectrolytes in electronic devices will be studied. For this purpose the proposer will learn the techniques of device fabrication and characterization. These investigations are of great interest to further evaluate the potential of conjugated polyelectrolytes in device applications.