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

Question

$\begin{array}{1 1} \text{holes in p - region attract them} \\ \text{electrons travel across the junction due to potential difference } \\ \text{electron concentration in n - region is more as compared to that in p - region} \\ \text{only electrons move from n to p-region and not the vice - versa} \end{array}$