Question

On the basis of energy band diagrams, distinguish between (i) an insulator, (ii) a semiconductor, and (iii) a conductor.

In the energy-band diagram of n-type Si, the gap between the bottom of the conduction band EC and the donor energy level ED is of the order of :

Draw energy band diagram for an n-type and p-type semiconductor at T > 0 K.

Assertion (A) : Silicon is preferred over germanium for making semiconductor devices. Reason (R) : The energy gap for germanium is more than the energy gap for silicon.