The band diagrams of three semiconductors p, n and intrinsic are given in the figures (1), (2) and (3). C and V are the conduction and valence bands and \(E_{F}\) is the Fermi level. Figures, from (2),(1) and (3) respectively represent the type of semiconductors as
Show Hint
Check where the Fermi level lies in each diagram. It is at the middle for intrinsic, near the valence band for p-type and near the conduction band for n-type.
Step 1: Reason with Impurities
A p-type semiconductor has acceptor levels close to the valence band, so $E_F$ moves towards V.
Step 2: n-type and Intrinsic
An n-type semiconductor has donor levels close to the conduction band, so $E_F$ moves towards C. An intrinsic one has $E_F$ at the centre of the gap.
Step 3: Match the Options
Figure (2) is p, figure (1) is intrinsic and figure (3) is n, matching the second option.
Final Answer:
The order p, intrinsic, n is the correct match.
\[ \boxed{\text{(B) }\text{p, intrinsic and n}} \]
