GaAs at T=300K is uniformly doped with donor impurity atoms to a concentration of Ng = 2 x 10 cm. Assume an excess carrier lifetime of 5 x 10"s. 10 ст a) Determine the excess electron-hole recombination rate if the excess hole concentration is õp- 5 x 10" cm'. b) What is the lifetime of electrons? c) Determine the thermal equilibrium recombination rate of holes.

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Types of Charge Carriers

A carrier is a type of object which carries a particular thing from one point to another point. For instance, people use different vehicles from one place to another, and the vehicle carries those people and acts as a carrier.