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  4. When a pentavalent impurity is added in Ge crystal then, what type of semiconductor is obtained ?

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Q. When a pentavalent impurity is added in $Ge$ crystal then, what type of semiconductor is obtained ?

UP CPMTUP CPMT 2009

Solution:

n-type semiconductor is obtained when Si or Ge (tetravalent) is doped with pentavalent inpurities like As, Sb, P, etc