What are organic EL materials?

Mechanism of light emission

When an electric current is applied to a specific organic compound, the molecules of the organic compound between the positive and negative electrodes are excited* by the electric energy. The energy generated when the excited state returns to the original state causes the molecules to emit light.
Organic EL uses this luminescence phenomenon (electroluminescence).

*Excitation
Making molecules or the like transfer to a higher energy state by supplying energy from the outside.

Electron transport layer: a layer that transports electrons to the luminescent layer
Luminescent layer: a layer in which holes and elections recombine to emit light
Hole transport layer: a layer that transports holes to the luminescent layer
Hole injection layer: layer for injecting holes from an anode

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