题 目：The Design of Organic Solar Cells with High Voltage and Efficiency 报告人：Prof. Mark E. Thompson Department of Chemistry, Mork Family Department of Chemical Engineering and Materials Science, University of Southern California 时 间：2015年5月13日 (周三)上午10:00 地 点：唐仲英楼B501 联系人：郑佑轩 (yxzheng@nju.edu.cn) 报告人简介: Mark E. Thompson completed his B.S. with honors in chemistry at the University of California at Berkeley in 1980 and got his Ph.D. in inorganic chemistry at the California Institute of Technology, Pasadena, CA in 1985. 1985-87, he was a Research Fellow at Inorganic Chemistry Laboratory, Oxford University. 1987-95, he was as Assistant Professor at the Princeton University. 1995-1999, he was as Associate Professor at Department of Chemistry, University of Southern California, and promoted to full Professor in 1999. During 2005-2008, he was appointed as the Chemistry Department Chairman. He got many important awards and honors such as USC Mellon Mentoring Award, 2014 American Chemical Society Award in Chemistry of Materials, Elected to the National Academy of Inventors,Richard C. Tolman Award, Named a Fellow of the American Association for the Advancement of Science (AAAS) and Alexander von Humboldt Research Award, etc. His research interests involve the optical and optoelectronic properties of molecular materials and devices, particularly organic LEDs and solar cells, as well as nanoscale materials, catalysis and biosensors. Mark Thompson has over 250 peer reviewed publications including Nature,Science, J. Am. Chem. Soc., Angew. Chem. Int. Ed, Adv. Mater. etc., and greater than 150 issued US patents. A detailed list is available at http://met.usc.edu. 报告摘要：The exciton is a critical part of each of the processes leading to photocurrents in Organic PhotoVoltaics (OPVs), and being able to control the location, lifetime and energy of the exciton is essential to achieving high efficiency. I will discuss our most recent work with both organic dyes, such as squaraines, and dipyrrins for OPVs. This involves a careful materials design study that leads to both low energy absorption (into the nearIR) and high open circuit voltage. We have diffraction methods to characterize the structure of the D/A interface and probe the role of this interfacial structure in controlling the OPV’s performance. I will also discuss a new approach to designing materials for OPVs that involves symmetry breaking charge transfer. These materials are symmetric molecules that spontaneously form an intramolecular charge transfer complex, with nearly complete one electron transfer form one part of the molecule to another. This intramolecular CT state readily forms a charge separated state at the D/A interface of the OPV. We have explored these materials as both donors and acceptors in OPVs and found that they give good performance and high Voc. 配位化学国家重点实验室 |