1.23 . A group 14 element is to be converted into n-type semiconductor by doping it with a suitable impurity. To which group should this impurity belong?

Answers (1)

The 14 group elements have four valence electrons, whereas group 15 elements like P have 5 valence electrons. In this, 4 out of 5 are used in making a bond with group 14 element and 1 is extra and becomes delocalised. This result in extra conductivity. So group 14 elements are required to be doped with the group 15 elements for forming n-type conductors.

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