Q11 · CSIR-NET Chemistry, June 2014

Paper: CSIR-NET June 2014 · Subject: Physical Chemistry · Chapter: Solid State Chemistry · Topic: Band Theory · Marks: 2 · Difficulty: Medium

When Si is doped with a Group V element
(a)donor levels are created close to the valence band
(b)donor levels are created close to the conduction band
(c)acceptor levels are created close to the valence band
(d)acceptor levels are created close to the conduction band
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
A group-V dopant (P, As) supplies an extra electron that sits in a donor level just below the conduction band, giving an n-type semiconductor.

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