Title: Excited state dynamics in molecule optoelectronic materials

Speaker: Chunfeng Zhang

Time&Location: 12:00 pm, Nov. 22,  Room B501, Tangzhongying Building

Abstract: 

In the detailed balance approximation, the efficiency limit of a single junction solar cell is less than 33%, known as Shockley-Queisser limit. When an electron-hole pair is created by absorbing a photon, the overall power conversion efficiency is reduced by the thermal loss of excess energy and exciton binding loss. In order to address these issues, our group have focused on developing ultrafast spectroscopic method to study the nonequilibrium processes holding the potential to break Shockley-Queisser limit.

Biography:

Professor Chunfeng Zhang obtained his BSC and PhD degrees from Fudan University and joined the faculty of Nanjing University on 2010. He has done research work at the Pennsylvania State University and Colorado University at Boulder. His group develop the ultrafast laser spectroscopy to study the light-matter interaction towards breaking current limitations in optoelectronic devices. He has co-authored over 170 papers in the journals including Nature, Nature Energy, Nature Chemistry, etc.