Linked from
The 13 pages that link to Gallium nitride, each with the reason it gives.
Light-emitting diodeBroader topic: It is a key material for blue LEDs and many white-light sources.
MicroLEDRelated: Many MicroLED emitters, especially blue ones, use gallium nitride.
Solid-state lightingRelated: Blue GaN LEDs enabled efficient white LED sources.
White LEDRelated: Its bandgap enables the short-wavelength emission used to make white LED light.
Shuji NakamuraRelated: Nakamura used gallium nitride as the material for his bright blue LEDs.