In semiconductor physics, what are 'holes'?

In semiconductor physics, what are 'holes'?

Step 1: Understand that semiconductors are materials that can conduct electricity under certain conditions.
Step 2: Know that in a semiconductor, electrons can move and carry negative charge.
Step 3: Realize that when an electron moves away from its position, it leaves behind an empty space.
Step 4: This empty space where the electron used to be is called a 'hole'.
Step 5: Since the hole represents the absence of a negatively charged electron, it behaves like a positive charge.
Step 6: Therefore, holes can move through the semiconductor and are considered positive charge carriers.

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