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 (as printed): B
Explanation
When Si is doped with group V elements like P, then at each P centre there is extra electron which constitute a donor band that lies close to empty corduction band.
Explanation as extracted from the printed page; notation may be imperfect.
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