Organic electronics have attracted enormous interest in the last 20 years. Organic optoelectronic devices, both light-emitting (e.g. OLEDs) and light-collecting (e.g. organic detectors (OPDs), and solar cells (OSCs)), have been a central thrust in this field. In these devices, the interplay between molecules, charge carriers, and light, is fundamental to their function. Advancing this emerging technology towards feasible commercial utilization depends on gaining a better understanding of the fundamental underlying processes, as a prerequisite for controlling and optimizing them for realizing higher device performance; more importantly efficiency and stability.
In that context, our research focuses on studying intra- and inter-molecular carrier and energy transfer processes in these molecular semiconductors. We use optoelectronic and spectroscopic measurements to probe and investigate exciton dynamics, charge trapping, and interactions between excitons and polarons in these devices, and in changes in them over time. New ideas in device design, evolving from the gained insights, are explored. In this seminar, I will introduce some of our research work along those lines.