Aluminium gallium arsenideAluminium gallium arsenide
(also Aluminum gallium arsenide
) is a semiconductor
with the very nearly the same lattice constant as GaAs
, but a larger bandgap
. The x
in the formula above is a number between 0 and 1 - this indicates an arbitrary alloy
The bandgap varies between 1.42 eV (GaAs) and 2.16 eV (AlAs).
The formula AlGaAs should be considered an abbreviated form of the above, rather than any particular ratio.