aluminium indium gallium and phosphide (AlInGaP)

AlInGaP (aluminum, indium, gallium, phosphorus) is a doped semiconductor material that has been used in light-emitting diodes (LEDs) since the early 1990s. The doping AlInGaP has a particularly high luminous intensity in the spectral wavelengths between 630 nm and 670 nm, i.e. red, orange and amber.