In an unbiased p-n junction electrons diffuse from n-region to p-region because :-

Options

A. free electrons in the n-region attract them
B. they move across the junction by the potential difference
C. hole concentration in p-region is more as compared to n-region
D. all of these

Answer

C

Explanation

In an unbiased pn junction, the diffusion of charge carriers across the junction takes place from higher concentration to lower concentration. Thus, option (c) is correct.