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Luminescence is a physical phenomenon in which electrons with a higher energy level fall to a lower one, causing emissions, for example as electromagnetic radiation or in the form of light.

Prior to emission, the electrons are transferred from a lower level to a higher level by adding energy. Since the electrons cannot stay at this level for long, they fall back and trigger the emission.

Luminescence can be a light emission in the visible or ultraviolet wavelength range, and it can also appear as X-rays, radioactive or electromagnetic radiation. The effect of electroluminescence is caused by electric fields and is used in light-emitting diodes and EL films. OLEDs use the effect of organic electroluminescence.

Englisch: luminescence
Updated at: 07.09.2019
#Words: 115
Links: level, electromagnetic radiation (EMR), light, emission, trigger
Translations: DE

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