In an extrinsic semiconductor, the conductivity significantly depends on:

Concept:

Conductivity (σ) for p-type material is:

σ = N_A q μ_p

Where N_A = Acceptor doping concentration (/cm³)

q = charge of e^- = 1.6 × 10^-19 C

μ_p = Mobility of holes (majority carrier in p-type)

Conductivity (σ) for n-type material is:

σ = N_D q μ_n

Where, N_D = Donor doping concentration (cm^-3)

v = charge of e^- = 1.6 × 10^-19 C

μ_n = Mobility of electron (majority charge carries in n-type)

Clearly, conductivity significantly depends on majority charge carriers generated due to impurity doping.