Subject: Physical Chemistry · Chapter: Solid State Chemistry · Topic: Band Theory · Exam: CSIR-NET JUNE 2014 · 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 an extra electron which constitutes a donor band that lies close to the empty conduction band.