Which element,or combination of elements,could produce a semiconductor with the following band structure? (CB = conduction band,VB = valence band)
A)Pure Si
B)Si and C
C)Si and In
D)Si and Sb
E)Si and F

Question

Which element,or combination of elements,could produce a semiconductor with the following band structure? (CB = conduction band,VB = valence band) 
A)Pure Si 
B)Si and C 
C)Si and In 
D)Si and Sb 
E)Si and F

Quizplus · Accepted Answer

The band structure shown in the image indicates a p-type semiconductor, meaning it has more holes (missing electrons) in the valence band than electrons in the conduction band. To achieve this, we need to introduce impurity atoms that have one less valence electron than the semiconductor material (Si in this case). Sb (antimony) is a group V element that has one more valence electron than Si, so when a small amount of Sb is added to Si, it creates holes in the valence band, making it a p-type semiconductor. Therefore, the combination of Si and Sb can produce the band structure shown in the image.

Which Element,or Combination of Elements,could Produce a Semiconductor with the Following