Physics - Semiconductors Question with Solution | TestHub

What number density of donor atoms must be added to pure germanium to produce an n-type semiconductor of conductivity $6.4\times 10^2{\Omega }^{-1}{\mathrm{m}}^{-1}$? Electron mobility is $4\times 10^{-1}{\mathrm{m}}^2{\mathrm{V}}^{-1}{\mathrm{s}}^{-1}$. Neglect the hole contribution.