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Answer to Question #11112 in Electric Circuits for JAMES JOHN

Question #11112
When a pn junction is made the diffusion of electrons from n type to p type occurs. How the holes from p type to n type flow in this case ? I was told that the hole current is due to the transfer of electrons from one valance band to the other. But as the diffusion current electrons are in conduction band , are they responsible for hole current OR only the valance band electrons take part in the flow of hole current? Plz answer
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