A Compound Semiconductor is a
semiconductor compound composed of
elements from two or more different groups of the
periodic table. For e.g. III-V semiconductors are composed of elements from group 13 (B, Al, Ga, In) and from group 15 (N, P, As, Sb, Bi). The range of possible formulae is quite broad because these elements can form binary (two elements, e.g.
GaAs), ternary (three elements, e.g.
InGaAs) and quaternary (four elements, e.g. InGaAsP). It is worth noting that
SiGe is technically an
alloy while
SiC is a compound since its elements are chemically bound.
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a semiconductor made up of two or more elements, for example GaAs, InP, SiC are commonly used compound semiconductors.
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