Question: A ptype extrinsic semiconductor is formed by adding a small number of aluminum (Al) acceptor impurities to an intrinsic germanium (Ge) semiconductor sample. Why does

A ptype extrinsic semiconductor is formed by adding a small number of aluminum (Al) acceptor impurities to an intrinsic germanium (Ge) semiconductor sample. Why does the concentration of holes in the valence band increase in concentration at room temperature? Include a sketch of the energy level diagram for the semiconductor as well as a sketch of the atomic bonding arrangement

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