An intrinsic semiconductor is a pure semiconductor material that has no significant level of impurities or dopants added to it. The electrical properties of intrinsic semiconductors are determined solely by the characteristics of the semiconductor material itself. Common examples of intrinsic semiconductors include silicon (Si) and germanium (Ge). ### Key Characteristics of Intrinsic Semiconductors: 1. **Pure Material**: Intrinsic semiconductors are chemically pure, meaning they contain no added impurities that would significantly alter their electrical properties.
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An intrinsic semiconductor has equilibrium mobile Electron and electron hole densities set predominantly by thermal excitation across its band gap, rather than by semiconductor doping. In the nondegenerate regime, charge neutrality gives .