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Professor Kenji Katayama, Department of Applied Chemistry, Chuo University

Event Date: 
Wednesday, September 11, 2019 - 12:30pm to 1:30pm

Photo-Induced Charge Dynamics in Photo-Devices-Photocatalysis, Water Splitting, Solar Cells

We have developed a time-resolved measurement technique called transient grating (TG) technique, where the refractive index change is monitored to study the photo-induced charge dynamics in the photo-devices, such as dye-sensitized solar cells, photocatalysis and water splitting materials. Our technique gives information on the charge dynamics in a wide time range from femtosecond to second for a wide variety of materials. Recently, the method has been further extended for the time-resolved imaging technique to obtain the structure-dependent charge carrier information (lifetime and mobility).  Also, various state-of-art statistical data and image analyses have been utilized to extract meaningful information from the big data of spatio-temporal responses.

Prof. Katayama is a full professor in the Department of Applied Chemistry at Chuo University, Japan, and the head of the Photoscience and Spectroscopy Lab. Before joining the university in 2006, he worked in the K. A. Nelson Group at MIT on Terahertz and acoustic spectroscopy and the T. Kitamori Group at The Univ of Tokyo (Microfluidics). His PhD work at the University of Tokyo was on Photothermal spectroscopy with the Sawada group. An expert in time-resolved spectroscopy and microscopy, Prof. Katayama works in fields ranging from photovoltaics to photocatalysis building photofunctional devices. He is also an expert in the photophysical properties of liquid crystals.

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