What is meaning of P type and N type semiconductor

Discussion in 'General Electronics Chat' started by vead, Sep 12, 2016.

  1. vead

    Thread Starter Active Member

    Nov 24, 2011
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    Hello
    Silicon is semiconductor material. Addition of impurity to semiconductor is known as doping. As I mentions in last diagram. Is it true one part is N type and another part is P type semiconductor.
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  2. Papabravo

    Expert

    Feb 24, 2006
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    Yes it is quite true. Addition of an N-type dopant provides an extra electron in the valance band of some atoms in the crystal. Addition of a P-type dopant provides a hole (the lack of an electron) in the valance band of some atoms in the crystal. Dopants come from elements groups III and IV of the periodic table.
     
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  3. vead

    Thread Starter Active Member

    Nov 24, 2011
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    That means when we add impurity to semiconductor, we get two types, N type semiconductor and P type semiconductor
    Can you tell me what is difference between intrinsic and extrinsic semiconductor?
     
  4. dl324

    Distinguished Member

    Mar 30, 2015
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  5. vead

    Thread Starter Active Member

    Nov 24, 2011
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    After reading, I found that, semiconductor in extremely pure form is intrinsic semiconductor. I think the type of semiconductor is depand on doping material
     
  6. bertus

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    Apr 5, 2008
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  7. Papabravo

    Expert

    Feb 24, 2006
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    Carbon, Silicon, and Germanium belong to group IV of the periodic table. they each have four valence electrons in their outermost shell.
    Elements in group III have only three electrons in their outermost shell. When one of these dopants replaces a semiconductor atom in the crystal lattice, it leaves a hole, and the material starts to become p-type.
    Elements in group V have five electrons in their outermost shell. when one of these dopants replaces a semiconductor atom in the crystal lattice, it is not required for valeance purposes and can move around, and the material starts to become n-type.
    Got it?
     
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