报告题目：Plasmon-Enhanced Solar Energy Conversion in Metal-Semiconductor Heterojunctions
报告人： 美国西弗吉尼亚大学吴年强教授
报告时间：2017年12月26日(周二)下午14：00
报告地点：材料学院曹光彪楼326会议室
邀请人： 高明霞教授
报告摘要：
This presentation is focused on the solar energy conversion via photovoltaics or photocatalysts. Emerging of surface plasmon resonance (SPR) provides a new opportunity to improve the performance of solar energy devices. This talk will present our effort on fundamental understanding of the underlying mechanism of plasmon-enhanced solar energy harvesting. In particular, the speech will discuss our newly discovered plasmon-induced resonant energy transfer (PIRET) mechanism in the metal-semiconductor heterojunctions, which is new addition to the existing mechanisms such as light scattering and hot electron injection. The PIRET mechanism along with the hot electron transfer process suggests that plasmonic nanostructures can act as photo-sensitizers. The discovery of plasmonic photo-sensitizers has opened a new avenue to develop efficient photocatalysts and solar cells. The theoretical maximum efficiency of solar energy conversion in plasmonic metal-semiconductor heterojunctions is predicted. This talk will demonstrate our effort on development of effective plasmonic metal-semiconductor heterojunctions to enable strong coupling between the plasmonic metal and the semiconductor. Our results show that plasmon can not only enhance photoconversion but also promote chemical processes in a sustainable manner.
报告人简介：
Dr. Nianqiang (Nick) Wu is currently Professor in Department of Mechanical & Aerospace Engineering at West Virginia University (WVU, Morgantown, WV 26506), USA. He received his Ph.D. degree in Materials Science & Engineering from Zhejiang University, China in 1997. He was a Postdoctoral Research Fellow at University of Pittsburgh from 1999 to 2001. Afterwards he directed Keck Surface Science Center at Northwestern University in USA in 2001-2005. He then joined WVU as Assistant Professor in 2005, promoted to Associate Professor in 2010 and Full Professor in 2014.
Dr. Wu is a Fellow of the Electrochemical Society (FECS) and a Fellow of Royal Society of Chemistry (FRSC). He has received the Benedum Distinguished Scholar Award and the Alice Hamilton Award for Excellence in Occupational Safety & Health. He was the recipient of the WVU Statler College Outstanding Researcher Award.
Dr. Wu’s current research interest lies in (i) photocatalysts and photoelectrochemical cells for solar energy harvesting, (ii) batteries and supercapacitors for energy storage, and (iii) biosensors and lab-on-chips for health care and environment monitoring. His research was funded by NSF, NIH, DOD, DOE and other funding agencies. He has authored or co-authored 163 journal articles, 3 book chapters and 1 book entitled “Biosensors Based on Nanomaterials and Nanodevices”. His papers were cited more than 2,400 times in a single year in 2016, achieving a total count of 14,000 throughout his career with an H-index of 58.
E-Mail: nick.wu@mail.wvu.edu
