In an unblased p-n junction, holes diffuse from the p - region to n- region because

Options

A. (a) free electrons in the n - region attract them
B. (b) they move across the junction by the potential difference
C. (c ) hole concentration in p - region is more as compared to n -region
D. (d) All of the above

Answer

C

Explanation

Hole diffusion from p to n side can be viewed as " electron diffusion"from n to p side .
Diffusion occurs due to differnce regions .
An electrons (or hole ) diffuses where its concentration is less.