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Intrinsic vs. Extrinsic Semiconductors is a document available to read on EtoBox.
An intrinsic semiconductor has low conductivity due to a low concentration of charge carriers that are generated thermally. When impurities are added, creating an extrinsic semiconductor, the conductivity increases due to an imbalance in charge carriers - either an excess of electrons in n-type or holes in p-type material. Trivalent impurities create p-type semiconductors with more holes, while pentavalent impurities create n-type semiconductors with more electrons. The main differences between intrinsic an
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