Luminescence

Photoluminescence is the result of photons being excited to a higher energy state and returned to a lower energy state with the emission of photons.


Eu³⁺ doped Y₂O₃ emits red when impinged with UV wavelength which is used in plasma display panels.

When excited with UV

Eu²⁺ doped SrGa₂S₄ emits green.

Eu²⁺ doped Sr₃SiO₅ emits blue.

Eu³⁺ doped SrY₂S₄ emits red.

The above red-blue-green combinations can be used in white LED's.

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