A material is made from Al, Ga, and As. The mole fraction of each element is 0.2
ID: 986483 • Letter: A
Question
A material is made from Al, Ga, and As. The mole fraction of each element is 0.25, 0.26, and 0.49, respectively. This material would be
A)
a metallic conductor because Al is present
B)
an insulator
C)
a p-type semiconductor
D)
an n-type semiconductor
E)
none of the above
the correct answer is C but i want to know why its not the others specifically why it's not D
A)
a metallic conductor because Al is present
B)
an insulator
C)
a p-type semiconductor
D)
an n-type semiconductor
E)
none of the above
Explanation / Answer
n-type Semi-Conductor
It is an extrinsic semi-conductor which is obtained by doping the impurity atoms of Vth group of the periodic table to the pure Ge and Si semi-conductor.
P-type Semi-Conductor
It is an extrinsic semi-conductor which is obtained by doping the impurity atoms of III group of the periodic table to the pure Ge and Si semi-conductor.
In this case As is in a higher proportion therefore we can assume is dopped by Al, Ga which are elements from the group III, making this a p-type semicoductor
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