What Is The Number Density Of Donor Atoms Which Must Be Added To A Pure Germanium Semiconductor To Produce An n-type Semiconductor Of Conductivity ? The Mobility Of Electrons In n-type Germanium Is . Neglect The Contribution Of Holes To Conductivity.

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Question

What is the number density of donor atoms which must be added to a pure germanium semiconductor to produce an n-type semiconductor of conductivity ? The mobility of electrons in n-type germanium is . Neglect the contribution of holes to conductivity.

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Solution

Correct option is

Given,

Neglecting the contribution of holes, the expression for is

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