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.

Question

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.

Correct Answer

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