In a p-n junction, which type of charge carriers are predominant in the p-type r

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Question: In a p-n junction, which type of charge carriers are predominant in the p-type region? (2019)

Options:

Correct Answer: Holes

Exam Year: 2019

Solution:

In a p-type region, holes are the predominant charge carriers.

In a p-n junction, which type of charge carriers are predominant in the p-type region? (2019)

In a p-n junction, which type of charge carriers are predominant in the p-type region? (2019)

Step 1: Understand what a p-n junction is. It is a boundary between two types of semiconductor materials: p-type and n-type.
Step 2: Know that p-type semiconductors are created by adding certain materials (dopants) that have fewer electrons than the semiconductor itself.
Step 3: Recognize that in p-type materials, the absence of electrons creates 'holes'.
Step 4: Realize that these holes act as positive charge carriers because they can accept electrons.
Step 5: Conclude that in the p-type region, holes are the predominant charge carriers.

Charge Carriers in p-n Junctions – In a p-n junction, the p-type region is characterized by an abundance of holes, which are the majority charge carriers, as opposed to electrons which are the majority in n-type regions.