Organic charge transfer at interfaces

拟议的研究计划的长期目标是解决界面处发生的电荷转移反应。了解界面的化学性质是一个巨大的挑战，需要确定所涉及的动力学，动力学和力。在界面处发生的基本化学对于推进许多技术至关重要，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：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）。有机材料中的电荷输运是新器件设计的中心主题。有机材料是传统无机材料的有吸引力的替代品，因为它们的溶液可加工性，易于使用合成和灵活性进行电子或溶解度调节。使用溶液处理，可以获得大面积的薄膜，这可以导致有机光致发光的成本显著降低。提出的合成是建立在噻吩作为空穴传输材料（p型）和醌作为电子传输材料（n型）。最初的合成目标包括芳族稠合噻吩，以开发更好的发色团，具有所需的红移吸收，以利用更多的太阳光谱来产生激发态。醌是众所周知的不溶性，我们建议衍生醌，以提高材料应用的溶解度。

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.