Bsc CSIT Semester 1 – Physics – Unit 6: Semiconductor and Semiconductor devices (8 Hrs.)

What do you mean by the contact potential? Give band scheme of a p-n Junction by illustrating:
$\quad$(a) Potential difference Vc resulting from the positive donor ions in the n-side of the depletion layer and the negative acceptor ions in the n-side of the depletion layer.
$\quad$(b) Potential energy barrier faced by the majority charge carriers (electrons) in the n-side of the diode as they attempt to cross the junction.
$\quad$(c) Potential energy barrier faced by the majority side of the diode as they attempt to cross the junction.

Discuss effective mass of electrons and holes.