Electrical engineering - Basics Page 49

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Diagram 60: PN-transition before the diffusion
Diagram 61: PN-transition after the diffusion and after the development of the depletion layer
Diagram 62:

If a voltage is now applied (negative pole at the N-semiconductor - positive pole at the P-semiconductor), an electric current is flowing as a result of the electron movement from the N-semiconductor to the P-semiconductor (from the electron surplus side to the electron deficiency side). In case of reverse poling no current can flow anymore because there is an electron deficiency in the P-semiconductor.

Diagram 63: Schematic representation of a diode connection

The following applies with regard to the function of a semiconductor diode:


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