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Recombination current

What is the recombination current? In a pn diode if there is small injection of electrons in p-semiconductor, a current (called recombination current) of p charges borns so the concentration of charges in each section of p is costant in time: this is right? Where are taken these p-charges?from quasi-neutral zone or from ohmic contact formed between wire and p-semiconductor? Thanks in advance

Reply to
silla822
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I think you are referring to the moment when the PN junction becomes reverse biased. There are a certain amount of carriers that must be recombined before the junction can reach the off-state. A big issue in high-frequency applications!

Reply to
Charles Schuler

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