Photoluminescence

Photoluminescence is a term in physics for the emission of light by a substance after it absorbs photons, and also the name of the process itself. It describes a highly sensitive spectroscopic method for process control and development of semiconductors. In this method light is first absorbed generating an excited state of electrons to higher energy levels. Subsequently, upon relaxation after returning to lower levels, light of lower energy is re-emitted to a ground state.

Nearby pages
Photosphere, Photosynthesis, Phototherapy unit, Phototype, Photovoltaic Cell