In a p-n junction, what is the region called where no charge carriers exist?

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Question: In a p-n junction, what is the region called where no charge carriers exist?

Options:

Correct Answer: Depletion region

Solution:

The depletion region is the area around the p-n junction where charge carriers have recombined, leaving behind immobile ions.

In a p-n junction, what is the region called where no charge carriers exist?

In a p-n junction, what is the region called where no charge carriers exist?

Step 1: Understand what a p-n junction is. It is a boundary between two types of semiconductor materials: p-type (positive) and n-type (negative).
Step 2: Know that in a p-n junction, charge carriers are electrons and holes. Electrons are negative charge carriers, and holes are positive charge carriers.
Step 3: When the p-type and n-type materials come into contact, electrons from the n-type region move to the p-type region and recombine with holes.
Step 4: This recombination of charge carriers creates a region where there are no free charge carriers left.
Step 5: This area, where no charge carriers exist, is called the depletion region.

Depletion Region – The area in a p-n junction where charge carriers (electrons and holes) have recombined, resulting in a lack of free charge carriers and the presence of immobile ions.