Question

Pure silicon doped with phosphorous is :

• A. Metallic conductor
• B. Insulator
• C. n-type semiconductor
• D. p-type semiconductor

Answer 1

The correct option is C n-type semiconductor

$\begin{array}{c}\text{We know that when pure silicon (Greoup}14\text{)}\\ \text{elements are doped with phosphorus (Group}15\text{)}\\ \text{elements we get an}n\text{-type semiconductor due}\\ \text{to excess of one electron in lattice.}\end{array}$