Question

A pure Si crystal can be converted to an n-type crystal by doping with

• A. P
• B. As
• C. Sb
• D. In

Answer 1

The Correct Option is A, B, C

An n-type semiconductor is created by doping a pure silicon (Si) crystal with a pentavalent element (an element with 5 valence electrons). This adds extra electrons as charge carriers, making the crystal n-type. 

• P (Phosphorus), As (Arsenic), and Sb (Antimony) are pentavalent elements, and any of these could theoretically dope Si to form an n-type semiconductor.
• However, P (Phosphorus) is commonly used due to its abundance, effectiveness, and ease of integration.