We investigate the fundamental physics and physical chemistry of energy materials, elucidating their electronic and structural dynamics alongside the nanoscale transport of charges, excitons, phonons and ions. We have pioneered a new generation of optical spectroscopy and microscopy methods that track these processes with exceptional spatial and temporal precision. We study diverse systems, spanning photovoltaics, light-emitting diodes and batteries. We aim not only to provide fundamental insights into these materials and devices, but also to develop functionalities that surpass current physical limits and pave the way for the scalable industrial application of these novel technologies