Question

Silicon doped with gallium forms

• A. P-type semiconductor
• B. N-type semiconductor
• C. Both n and p type semiconductor
• D. an intrinsic semiconductor

Answer 1

The Correct Option is A

When silicon (Si), which has 4 valence electrons, is doped with gallium (Ga), which has 3 valence electrons, it creates a p-type semiconductor. This occurs because gallium has one fewer valence electron than silicon, creating a "hole" in the crystal structure where an electron is absent. This hole acts as a positive charge carrier, making the material a p-type semiconductor. Thus, silicon doped with gallium forms a p-type semiconductor, which corresponds to option (A).

The correct option is(A) : P-type semiconductor