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Which of the following statements are true about semiconductors?
(i) Silicon doped with an electron-rich impurity is a p-type semiconductor.
(ii) Silicon doped with an electron-rich impurity is an n-type semiconductor.
(iii) Delocalised electrons increase the conductivity of doped silicon.
(iv) An electron vacancy increases the conductivity of the n-type semiconductor.
Answers (1)
The answer is the option (ii, iii) Silicon (valence electron – 4) doped with electron rich impurity is an n-type semiconductor due to extra electron. The conductivity of doped silicosis increased by the delocalised electrons.
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