Monday, July 2, 2018, 1:30 pm — CFN, Bldg. 735, Conference Room B, 2nd Floor
My talk would be based on one of the most sensitive absorption measurement techniques called – Photothermal Deflection Spectroscopy (PDS). PDS possesses a capability of measuring absorption with 4-5 orders of magnitude dynamic range of sensitivity as compared to 1-2 orders of magnitude demonstrated by traditional absorption spectrometers. I will talk about how PDS works and how is it useful in undertaking some in-depth analysis of material quality, defects, new kind of states known as charge transfer states and doping, etc. I will explain the utility of this tool in various fields of research including solar cells, LEDs and FETs. I will also try to give a brief account on my current research on perovskite semiconductors. I will also introduce you to the exciting world of perovskite semiconductors and talk about the interesting role of defects in perovskites – both passive/static and dynamic defects.
Hosted by: Chang-Yong Nam & Nikhil Tiwale
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