An inner electron in a low energy level can rise to a higher energy level. We say that it becomes ‘excited’. An electron can be excited when its absorbs energy from electromagnetic radiation.

Excitons, encountered in technologies like solar cells and TVs, are quasiparticles formed by an electron and a positively charged "hole," moving together in a semiconductor. Created when an electron ...

They propose that the electron trapping in their system occurs through a process called Auger-assisted ionization, which creates excited electrons and is known to be efficient in the presence of ...

If an electron is in an excited state it can return to a lower energy level. When it does this, it loses energy. The amount of energy it loses will be equal to the difference in the energy levels ...