报告题目：High Performance Solution-Processed Perovskite Solar Cells via Device Engineering and Novel Materials 

　　报告人：Xiong Gong, Ph. D. 

　　College of Polymer Science and Polymer Engineering, The University of Akron, Akron OH 44325 

　　报告时间：8月25日（星期五）上午9:00点 

　　报告地点：理化楼三楼会议室 

　　Abstract: 

　　Efficiently and economically harnessing the solar energy via photovoltaic (PV) devices presents as one of promising solutions to the global energy crisis. However, over 80% available PVs are silicon-based solar cells and inorganic thin film solar cells, which are expensive and require critical processing techniques. Solution-processed perovskites hybrids solar cells have shown great potential as novel, high-efficient and low-cost PV devices, which are renewable, economic and green energy sources in the future energy market. In this presentation, I would like to share with you how we approach high-performance solution-processed perovskite hybrid solar cells. 

   In order to facilitate electron extraction efficiency in perovskite solar cells and make it comparable to the hole extraction efficiency, we, for the first time, demonstrate bulk heterojuncion perovskite solar cells with enhanced efficiency and less photo-hysteresis; 

   By reengineering the interface of solution-processed perovskite materials with cross-linkable ionomer and polymer doped high electrical conductive hole extraction layer, we are able to demonstrate perovskite hybrid solar cells with boosted efficiency and significantly reduced photo-hysteresis;  

   In order to balance charge transporting properties, eliminate toxic lead and enhance stability of cells, we have developed novel perovskite materials incorporated with transition metals for substituting lead and incorporated with polymer to enhance the stability. As a result, device performances of solution-processed perovskite solar cells fabricated by these novel perovskite materials are significantly boosted. 

　　Short Bio of Dr. Xiong Gong 

   Currently, Dr. Gong is a Professor in the Department of Polymer Engineering of the College of Polymer Science and Polymer Engineering at the University of Akron. He is also an Adjunct Chair Professor in the State Key Laboratory of Luminecene Materials and Devices at South China University of Technology. He was a manager of CBRITE Inc. and senior research scientist in the Center of Polymers and Organic Solids at University of California Santa Barbara. Dr. Gong received B. Sc. major in Chemistry, M. Sc. Major in Chemistry and Ph. D. major in Physics from China. He did his post-doc in the Center of Polymers and Organic Solids at University of California Santa Barbara, with Professor Alan Heeger, a Nobel Prize Laureate. Dr. Gong received many international and national awards and honors including named the top 1% mostly cited researchers in the years of 2014, 2015 and 2016, the world's most influential scientific minds 2015, National Science Foundation (NSF) Career award (2014) and NSF of China oversea outstanding Chinese youngest scientist award (2008). He has accomplished over 180 articles published in the peer reviewed journals, with a peer citation 20,000 times. He earned an H-index of 54. He also contributed 35 granted/pending patents and 9 book chapters.