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，旨在用于光科学技术。我们正在寻找新的方法，利用光诱导电子转移化学来制造新的光活性和电活性材料。我们的研究计划以以下问题为指导：在分子和聚合物有机半导体上观察到的电子性质以及它们在溶液和固体中的电荷输运是由什么基本因素控制的州？如何操纵这些因素以获得新的有用产品？如何利用这些新知识来开发材料和设备，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技术和理论方法相结合，以获得定量的理解之间存在的关系的低聚物的构象和它的光谱特性。这种理解将指导更高效的光驱动晶体管和太阳能电池的开发。 这些光学效应是由排斥性链内空间相互作用和吸引性链间相互作用（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。这些基础研究具有深远的技术意义，将有助于我们系统地了解聚集体结构与电子性质之间的关系。 事实上，这些材料已经用于微电子、电致变色材料和电致发光二极管和传感器中的新器件的开发。

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.