SolutionEquation(),theFermi-(),thethermal-,theBoltzmannapproximationisnolongervalidsothatEquation()-equilibriumelectronconcentrationissiliconat300kforthecasewhen.【Ans.】________________________________________________________________________Wecanusethesamegeneralmethodtocalculatethethermal-equilibriumconcentrationofholesobtain()where()and()Theintegralinequation()isthesameFermi-DiracintegraldefinedbyEquation(),>0,,,farexample,inann-typematerialWehaveassumedthattheimpuritiesintroducediscrete,noninteractingdonorenergystatesinthen-|simplifiedenergy-banddiagramsfordegeneratelydoped(a)n-typeand(b)p-
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