Draw the "energy bands" diagram for a (i) pure semiconductor (ii) insulator. How does the energy band, foe a pure semiconductor, get affected when this semiconductor is doped with an acceptor impurity donor impurity? Hence discuss why the 'holes' and the 'electrons' respectively, become the 'majority charge carriers' in these two cases.

Draw the Energy bands 'diagrams for a (i) pure semiconductor , (ii) insulator , How does the energy band, for a pure semiconductor , get affected when this semiconductor is doped with (a) an acceptor impurity (b) donor impurity ? Hence discuss why the 'holes' and the 'electrons' respectively, become the 'majority change carries' in these two cases ? Write the two processes involved in the formation of p-n junction.

How does the energy gap of an intrinsic semiconductor vary, when doped with a trivalent impurity?

How does the energy gap of an instrinsic semiconductor vary, when doped with a pentavalent impurity?

How does the energy gap of an intrinsic semiconductor vary. When doped with a trivalent impurity?

How does the energy gap in an instrinsic semiconductor vary, when doped with a pentavalent impurity and a trivalent impurity. Draw their energy band diagrams.

Draw the energy band diagram when intrinsic semiconductor (Ge) is doped with impurity atoms of Antimony (Sb). Name the extrinsic semiconductor so obtained and majority charge carriers in it.