Organic charge transfer at interfaces

拟议研究计划的长期目标是解决发生在界面上的电荷转移反应。理解界面上的化学是一个巨大的挑战，需要确定所涉及的动力学、动力学和力。界面上发生的基础化学对于推进包括生物传感器(即早期疾病检测)、设计新的分子识别策略(即药物与蛋白质相互作用)和优化有机材料器件(即Gratzel电池、有机场效应晶体管、有机太阳能电池、有机发光二极管)等众多技术至关重要。有机材料中的电荷传输是新器件设计的中心主题。有机材料是传统无机材料的极具吸引力的替代品，因为它们的溶液可加工性、易于通过合成进行电子或溶解度调节以及灵活性。通过溶液处理，可以获得大面积薄膜，这可能会大幅降低有机光伏的成本。所提出的合成是围绕作为空穴传输材料的噻吩类化合物(p型)和以对苯二酮作为电子传输材料的(n型)构建的。最初的合成目标包括芳香稠合的噻吩类化合物，以开发更好的发色团，并具有所需的红移吸收，以利用更多的太阳光谱来创建激发态。对苯二酮是出了名的不溶于水，我们建议将对苯二酮进行衍生化，以提高材料应用中的溶解性。

The long-term objective of the proposed research program is to address charge transfer reactions that occur at interfaces. Understanding the chemistry at interfaces is an enormous challenge and there is a need to determine the kinetics, dynamics and forces involved. The fundamental chemistry occurring at an interface is critical to advancing numerous technologies including biosensors (i.e. early stage disease detection), designing novel molecular recognition strategies (i.e. drug:protein interactions) and optimizing organic material devices (i.e. Gratzel cells, organic field effect transistors, organic solar cells, organic light-emitting diodes). Charge transport in organic materials is the central theme in the design of new devices. Organic materials are attractive replacements for conventional inorganic materials because of their solution processability, ease of electronic or solubility tuning using synthesis and flexibility. Using solution processing, large area thin films are attainable, which could lead to dramatic cost reductions for organic photovoltaics. The proposed syntheses are built around thiophenes as hole transport material (p-type) and quinones as electron transport material (n-type). Initial synthetic targets include aromatic-fused thiophenes to develop better chromophores, with desired red-shifted absorbance to take utilize more of the solar spectrum to create excited states. Quinones are notoriously insoluble and we proposal to derivatize quinones to enhance solubility for material applications.