Intrinsic Semiconductor

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Intrinsic semiconductor has charge carriers generated mainly by?

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1. **Intrinsic Semiconductor**: A pure semiconductor material (like Silicon or Germanium) without any impurities.
2. **Carrier Generation**: At absolute zero, the valence band is completely full and the conduction band is empty. The material behaves as an insulator.
3. **Effect of Temperature**: As temperature increases, some valence electrons gain enough **thermal energy** to jump across the forbidden energy gap ($E_g$) into the conduction band.
4. **Mechanism**: Each electron that jumps leaves behind a vacancy in the valence band called a **hole**. Thus, electron-hole pairs are created thermally.
5. **Doping Check**: Doping is used to create *extrinsic* semiconductors. Thermal excitation is the primary source for *intrinsic* ones.

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Intrinsic Semiconductor

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