报告摘要:
The presentation focuses on developments of cost effective solar cells currently conducted in Qiao group, including dye-sensitized solar cells (DSCs) and polymer solar cells (PSCs). In DSCs, carbon nanofibers are used as a low cost alternative to Pt counter electrode and achieved comparable cell performance at a lower cost, also TiO2 nanofiber/nanoparticle composite is used as an innovative photoanode for high efficiency DSCs. In polymer solar cells (PSCs), current cell efficiency is still low for commercial applications, and the major issues include narrow spectral light harvesting and inefficient charge transport. New conjugated polymers with optimized bandgaps and energy levels are needed for higher efficiencies in both single and multijunction solar cells; the dependence of cell efficiency on polymer bandgaps and energy levels in organic and organic/inorganic hybrid single and multijunction solar cells is presented, providing guidance for the engineering of new conjugated polymers and photovoltaic devices.

报告人简介：
Dr. Qiquan Qiao, assistant professor in Electrical Engineering, obtained his B.E. from Hefei University of Technology, M.S. from Shanghai Institute of Optics and Fine Mechanics at Chinese Academy of Sciences, and Ph.D. from Virginia Commonwealth University. In 2006, he joined the group of Prof. John Reynolds at University of Florida as a Postdoctoral Researcher. Then in 2007, he joined faculty in the Department of Electrical Engineering and Computer Sciences at South Dakota State University (SDSU), where he established the Organic Electronics Laboratory. Current research focuses on dye-sensitized solar cells and polymer photovoltaic materials and devices. He received 2009 Bergmann Memorial Research Award from US-Israel Binational Science Foundation and 2010 Early Career (CAREER) Award from US National Science Foundation. He is also a recipient of Excellence in Research Award in the Department of Electrical Engineering and Computer Sciences at SDSU. During his graduate study, he received 2006 ASME Solar Energy Division Graduate Student Research Award and 2006 Chinese Government Award for Outstanding Students Aboard.