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Which of the following, when added as an impurity, into the silicon, produces n-type semiconductor?(a) Phosphorous(b) Aluminum(c) Magnesium(d) SulfurThe question was asked in unit test.This interesting question is from Extrinsic Semiconductor in portion Semiconductor Electronics : Materials, Devices and Simple Circuits of Physics – Class 12

Answer»

The correct answer is (a) Phosphorous

Best EXPLANATION: As phosphorous is pentavalent, it produces n-type SEMICONDUCTOR when added to silicon. They are called donor impurities. By ADDING PHOSPHORUS, extra VALENCE electrons are added that become unbonded from individual atoms.



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