The forbidden energy gap between the valence band and the conduction band in semi- conductors is:
Question
The forbidden energy gap between the valence band and the conduction band in semi- conductors is:
Solution
The forbidden energy gap in semiconductors is typically very small. For silicon, the most commonly used semiconductor, the energy gap is about 1.1 electron volts (eV) at room temperature. For germanium, another common semiconductor, the energy gap is even smaller, at 0.67 eV. This small energy gap is what allows semiconductors to conduct electricity under certain conditions, despite being poor conductors under normal conditions.
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