"In a semiconductor, the number density of intrinsic charge carries at 27$^\circ$C is 1.5 $\times$ 1016/m3. If the semiconductor is doped with impurity atom, the hole density increases to 4.5 $\times$ 1022/m3. The electron density in the doped semiconductor is ___________ $\times$ 109/m3."

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Accepted Answer

"${n_e}{n_h} = {n_i}^2$

$${n_e} = {{{n_i}^2} \over {{n_h}}} = {{{{(1.5 \times {{10}^{16}})}^2}} \over {4.5 \times {{10}^{22}}}}$$

$= {{1.5 \times 1.5 \times {{10}^{32}}} \over {4.5 \times {{10}^{22}}}}$

$= 5 \times {10^9}$/m³"

In a semiconductor, the number density of intrinsic charge carries at 27$^\circ$C is 1.5 $\times$ 10¹⁶/m³. If the semiconductor is doped with impurity atom, the hole density increases to 4.5 $\times$ 10²²/m³. The electron density in the doped semiconductor is ___________ $\times$ 10⁹/m³.

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In a semiconductor, the number density of intrinsic charge carries at 27$^\circ$C is 1.5 $\times$ 1016/m3. If the semiconductor is doped with impurity atom, the hole density increases to 4.5 $\times$ 1022/m3. The electron density in the doped semiconductor is ___________ $\times$ 109/m3.

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In a semiconductor, the number density of intrinsic charge carries at 27$^\circ$C is 1.5 $\times$ 10¹⁶/m³. If the semiconductor is doped with impurity atom, the hole density increases to 4.5 $\times$ 10²²/m³. The electron density in the doped semiconductor is ___________ $\times$ 10⁹/m³.