Distinguish between intrinsic semiconductor and p-type semiconductor. Give reason, why a p-type semiconductor crystal is electrically neutral, although `n_(h)gt gtn_(e)`?
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**Step 1: Definition of Intrinsic Semiconductor**
- An intrinsic semiconductor is a pure semiconductor material, such as silicon (Si) or germanium (Ge), that has no significant impurities. Its electrical conductivity arises from the thermally generated electron-hole pairs. In intrinsic semiconductors, the number of free electrons (n_e) is equal to the number of holes (n_h), i.e., n_e = n_h.
**Step 2: Definition of P-Type Semiconductor**
- A p-type semiconductor is formed when a pure semiconductor (like silicon or germanium) is doped with trivalent impurity atoms (elements with three valence electrons), such as boron (B) or indium (In). In a p-type semiconductor, the majority charge carriers are holes, which are created due to the absence of electrons in the bonding structure.
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