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Asked: December 1, 20202020-12-01T11:57:13+00:00 2020-12-01T11:57:13+00:00In: Electricity and Magnetism

P-type semi-conductor

P-type semi-conductor

Explain how doping produces a p-type semi-conductor from pure semi-conductor
material.

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  1. Benedict
    Best Answer
    Benedict Begginer
    2020-12-01T13:28:54+00:00Added an answer on December 1, 2020 at 1:28 pm

    A group to three atom (Boron, Indium)- acceptor atom, is used as an impurity to bond covalently in the lattice of a pure semi-conductor (Silicon). Of the four electrons of silicon, three are used to bond with three electrons of Boron, leaving one electron unbounded. There’s thus a hole created, with silicon, which contributes for bonding with Boron, thus holes become majority charge carriers. This results to a semi-conductor called p-type (extrinsic semi-conductor)

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  2. rwarkz
    rwarkz Pundit
    2020-12-01T16:44:21+00:00Added an answer on December 1, 2020 at 4:44 pm

    Silicon or a germanium is doped by a group 3 atom where all of them bond leaving a hole as a majority carrier hence p type

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    • BettyWanjala
      BettyWanjala Begginer
      2020-12-02T12:33:44+00:00Replied to answer on December 2, 2020 at 12:33 pm

      A trivalent atom is used in doping. Only 3 electrons will participate in the bonding leaving a hole in the fourth electron of the silicon that is to bond. Holes become the majority charge carriers

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  3. asenamangala
    asenamangala Teacher
    2020-12-02T17:48:21+00:00Added an answer on December 2, 2020 at 5:48 pm

    P-type semiconductor is achieved by doping an impure semiconductor by use of a trivalent atom like Boron, Gallium or Indium. The three outermost electrons will participate in bonding leaving a hole which will be used as a charge carrier.

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