IISER MOHALI

Abstract: The way in which energy flows across materials is central to the functioning of devices like solar cells. That flow is dictated by the energy levels within the material. Problematic energy levels, like trap states, hinder energy flow. In this talk, I will present data collected using broadband, ultrafast 2D White-Light Microscopy, which allows one to spatially map energy levels in addition to the kinetics, thereby linking the energy landscape to energy flow. The focus will be energy flow in microcrystals that support singlet fission and, if there is time, thin films of semiconducting carbon nanotubes. Interestingly, low-lying energy levels have been found, created by small populations of defects, which actually enhance energy flow.