Upcoming Events

Redox Control for One-electron K-air Batteries and P-type Dye-sensitized Solar Cells

February 18, 2014 11:00AM to 12:00PM
Presenter 
Yiying Wu, Ohio State University
Location 
Building 205, Y-Wing Auditorium
Type 
Colloquium
Series 
CSE Colloquium
Abstract:
Overcoming the large overpotentials in the multi-electron oxygen reduction/evolution reactions has been the grand challenge in the development of fuel cells and metal-air batteries. In my talk, I will first present a K-O2 battery that uses K+ ions to capture O2- to form the thermodynamically stable KO2 product. This allows for the battery to operate through the facile one-electron redox process without using any catalysts.

In the second part of my talk, I will describe our recent results in p-type dye-sensitized solar cells for the fabrication of tandem dye-sensitized solar cells and artificial photosynthesis. The development of cyclometalated ruthenium sensitizers, p-type semiconductors and the interfacial charge transfer will be presented, as well as an integrated electrode based on a cyclometalated ruthenium sensitizer and a cobaloxime catalyst for photoelectrochemical water reduction.

Biography:
Yiying Wu received his B.S. in chemical physics from the University of Science and Technology of China in 1998, and his Ph.D. in chemistry from the University of California at Berkeley in 2003. He then did his postdoctoral research with Professor Galen D. Stucky at the University of California, Santa Barbara, and joined the chemistry faculty at The Ohio State University in the summer of 2005. He was promoted to associate professor with tenure in 2011. His group focuses on materials chemistry for energy conversion and storage.