One of the world's fastest cameras captures motion of electrons

During the conversion of light into electricity, such as in solar cells, a large part of the input light energy is lost. This is due to the behaviour of electrons inside of materials. If light hits a material, it stimulates electrons energetically for a fraction of a second, before they pass the energy back into the environment. Because of their extremely short duration of a few femtoseconds--a femtosecond is one quadrillionth of a second--these processes have hardly been explored to date. A tea...