Semiconductors aluminium compounds

Band Structures of Aluminium Compounds. Aluminium Nitride (AIN). Aluminium nitride is a direct-gap semiconductor. Since it crystallizes in the wurtzite structure, the band structure (Fig. 4.1-66) differs from that of most of the other III-V compounds. 

Al, Ga and In form tetrahedrally coordinated solids with elements of group 15, which are part of the series of III-V semi-conductor (i.e., groups 13-15). The mixed compounds gallium aluminium phosphides Ga r AljP and the arsenide Gaj r AljAs are used for light-emitting diode (LED) displays and semiconductor lasers. 

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