An intrinsic carrier concentration of a p-typesemiconductor is 1×1010/cm3 and themajority carrier concentration is 1×1018/cm3. Then minority carrier concentration is(Assume the p-type semiconductor is under thermal equilibrium)
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Solution
Given, Intrinsic carrier cncentration of p-type semiconductor,ni=1×1010/cm3Majority carrier concentration,p=1×1018/cm3Under thermal equilibrium, mass action law is valid for semiconductor∴np=n2i∴Minority carrierr concenrationn=n2ip=10201018=102/cm3