Gallium nitride is a binary III/V direct bandgap semiconductor commonly used in blue light-emitting diodes since the 1990s. The compound is a very hard material that has a Wurtzite crystal structure.
GaN crystal
GaN high-electron-mobility transistors (manufactured by Ferdinand-Braun-Institut)
A 30 W GaN USB-PD wall charger (right) is significantly smaller than a traditional silicon-based charger (left) of the same power rating.
Gallium phosphide, a phosphide of gallium, is a compound semiconductor material with an indirect band gap of 2.24 eV at room temperature. Impure polycrystalline material has the appearance of pale ora