Physics - Semiconductors Question with Solution | TestHub

The density of electron-hole pair in a pure germanium is$3\times {10}^{16} {\mathrm{ m}}^{-3}$at room temperature. On doping with aluminium, the hole density increases to$4.5\times {10}^{\mathrm{22 }}{\mathrm{ m}}^{-3}.$Now, the electron density$\left(\mathrm{i}\mathrm{n} {\mathrm{ m}}^{-3}\right)$in doped germanium will be