1.

Find the number density of impurity atoms that must be added to a pure silicon crystal inorder to convert it to have resistivity (i) 10^(-1) Omegam n-type silicon (ii) 10^(-1)Omegam p-type silicon. Give for silicon: mu_(e)=0.135m^(2)V^(-1)s^(-1) and mu_(h)=0.048m^(2)V^(-1)s^(-1).

Answer»

Solution :(i)Density of acceptor atoms in P-type SI
`N_(d)=(sigma)/(emu_(2))=(1)/(emu_(erho))=(1)/(1.6xx10^(-19)xx0.13xx10^(-1))`


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