Question

For the same dopant concentration, the n–type silicon semiconductor has _____ as compared to a p–type silicon semiconductor.

(1) Higher conductivity

(2) Higher resistivity

(3) Lower mobility

(4) Lower net charge

Answer 1

(1) Higher conductivity

For the silicon semiconductor, 

Mobility of electrons = μ_e = 1350 cm² V^-1 sec^-1 

Mobility of holes = μ_n = 480 cm² V^-1 sec^-1 

Conductivity of electrons = σ = p x q x μ_e

Conductivity of holes = σ = p x q x μ_n

Now, since dopant concentration is same, 

Concentration of electrons (n) = concentration of holes (p) 

Conductivity of n–type sample is more than p–type sample.