Insights into Photophysical Processes in Organic Photovoltaics by Electron Spin Resonance

Organic photovoltaics is one of many technologies playing a role in the transition to more sustainable energy sources. Since the photovoltaic mechanism involves a series of states characterised by unpaired electron spins, we use Electron Spin Resonance to gain an improved fundamental understanding of the energy conversion process. With Electrically Detected Magnetic Resonance, we extend this study to fully assembled devices, directly probing spins involved in current generation. In this talk, I will present our latest results on the characterisation of spins and spin-dependent processes involved in charge separation, transport and recombination in donor:acceptor blends for organic photovoltaics.