electronic spectroscopy and molecular photophysics of oligomers and polymers

十多年来，我们的团队一直致力于合成光导体和半导体，旨在用于基于光科学的技术。我们正在寻求利用光致电子转移化学来制造新的光活性和电活性材料的新方法。我们的研究计划以以下问题为指导：什么基本因素控制了在分子和聚合物有机半导体上观察到的电子性质及其在溶液和固态中的电荷输运？如何控制这些因素以获得新的有用产品？如何将新知识用于开发材料和器件，如有机场效应晶体管和光伏（太阳能）电池？我们的研究小组正在采用光谱学技术和理论方法的结合，以获得对低聚物构象与其光谱性质之间存在的关系的定量理解。这种认识将指导更高效的光驱动晶体管和太阳能电池的发展。这些光学效应是由排斥性链内空间相互作用和吸引力链间相互作用（聚集）之间的微妙平衡驱动的。这些低聚物的聚集将在溶液（好/坏溶剂的混合物）和薄膜中进行研究。从这些研究中，将会出现一个关于聚集体结构和电子性质之间关系的系统图景。这些基础研究具有深刻的技术相关性。事实上，这些材料已经用于开发微电子、电致变色材料和电致发光二极管和传感器的新设备。

For more than a decade, our group has been making synthetic photoconductors and semiconductors aimed at being used in the photoscience based technology.We are seeking new ways to use photoinduced electron transfer chemistry to make new photoactive and electroactive materials.Our research program is guided by the following questions:  What fundamental factors control the electronic properties observed on molecular and polymeric organic semiconductors and their charge transport in solution and in the solid state?How can these factors be manipulated to obtain new useful products?How can the new knowledge be used to develop material and devices such as organic field-effect transistors and photovoltaic (solar) cells?Our group of reseachers are employing a combination of spectroscopic techniques and theoretical approaches to gain a quantitative understanding of the relationship that exists between the conformation of an oligomer and its spectral properties. This understanding will guide the development of more efficient light-driven transistors and solar cells.  These optical effects are driven by a delicate balance between repulsive intrachain steric interactions and attractive interchain interactions (agregation).The agregation of these oligomers will be studied in solutions (mixtures of good/bad solvents) and as films. A systematic picture of the relationship between agregate structure and electronic properties will emerge from these studies.These fundamental studies have profound technological relevance.  Indeed, these materials have already been used in the development of new devices in micro-electronics, in electrochromic materials and in electroluminescent diodes and sensors.