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Which of the following, when added as an impurity, into the silicon, produces n-type semi conductor? (a) Phosphorous (b) Aluminium (c) Magnesium (d) Both b and c



Which of the following, when added as an impurity, into the silicon, produces n-type semi conductor?


        (a)    Phosphorous      


(b)    Aluminium


        (c)    Magnesium


        (d)    Both b and c


Grade:upto college level

1 Answers

Aditi Chauhan
askIITians Faculty 396 Points
7 years ago

(a)

Phosphorous (P) is pentavalent and silicon is tetravalent. Therefore, when silicon is doped with pentavalent impurity, it forms a n-type semiconductor.

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