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
Silicon (valence electron 4) doped with electron rich impurity is an n-type semiconductor due to extra electron and the delocalised electrons increase the conductivity of doped silicon.
