报告题目：Development of Cost Effective Solar Cells: Dye-Sensitized Solar Cells and Polymer Solar Cells
报告人：Prof. Qiquan Qiao (乔启全)
Department of Electrical Engineering and Computer Sciences，South Dakota State University
报告时间：2012年7月19日（星期四）上午 10:00 -11:30
报告地点：独墅湖校区907号楼1445报告厅
欢迎感兴趣的师生踊跃参加！
报告摘要：
The presentation will focus on the development of cost effective solar cells including dye-sensitized solar cells (DSCs) and polymer solar cells (PSCs) that are currently be conducted in Qiao group. In dye-sensitized solar cells, 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. The introduction of TiO2 nanofibers into the photoanode increased light absorption by forward light scattering and improved charge transport efficiency due to highly crystalline grains with fewer grain boundaries in TiO2 nanofibers. In polymer solar cells, current cell efficiency is still low for commercial applications. New materials and device designs are needed to increase the efficiency. The major issues in polymer solar cells include narrow spectral light harvesting and inefficient charge transport. To solve these issues, new conjugated polymers with optimized bandgaps and energy levels (HOMO and LUMO) need to be designed for significantly 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 will be presented, which will provide guidance for the engineering of new conjugated polymers and photovoltaic devices.
乔启全教授简介
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. In addition to his recent receipt of the 2012 College/> of Engineering Young Investigator Award/> and one of the 2012 College/> of Engineering Grantswinship/>/> awards, Dr. Qiao was also a recipient of the 2010 Excellence in Research Award from the College's EECS department. In 2010, Dr. Qiao was granted an Early Career Award from the US National Science Foundation, and in 2009 he received the Bergmann Memorial Award from the US-Israel Bi-national Science Foundation. During his graduate study, Dr. Qiao received the 2006 American Society of Mechanical Engineers Solar Energy Division Graduate Student Research Award and the 2006 Chinese Government Award for Outstanding Students Abroad. Dr. Qiao's research of next generation cost effective solar cells focuses on new approaches to enduring challenges in photovoltaic technologies. Specifically, his team is working on (1) increasing light absorption through the design and synthesis of new organic semiconductors, including broadband dyes and polymers; (2) enhancing charge transport through the growth and optimization of inorganic nanostructures with high carrier mobility, such as ZnO, TiO2 and CdSe nanorods; (3) maximizing power output by engineering donor/acceptor morphology; and (4) fabricating and testing high efficiency dye-sensitized solar cells and polymer solar cells.
高分子科学与工程系
材料与化学化工学部
2012-7-18
