In the depletion region of an unbiased P-N junction diode there are
Both electrons and holes
Only fixed ions
As we discussed in concept
P-N junction -
When p type semiconductor is mixed with N - type semiconductor, P-N junction formed
There is very thin region (of the order of micro meter) called depution region.
In the depletion region, all the holes and electrons combined together and anhiliate each other and hence only ions will be present in depletion region.
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