Intrinsic vs Extrinsic Semiconductor: What's the Difference? Quiz & Flashcards

What is the function of a Group 3 impurity in a semiconductor?

What happens when a P-N junction is formed using different semiconductor materials without doping?

What gives rise to a diffusion current across a P-N junction?

What is formed as a result of an electron diffusing from the n-side to the p-side in a P-N junction?

What causes an electric field to develop in a P-N junction?

What is the pure form of a semiconductor known as?

How is the n-type semiconductor produced?

What are the ionized phosphorus atoms added to the silicon called?

What type of impurities are intentionally added to produce an extrinsic semiconductor?

What is the P-type semiconductor produced by adding to the intrinsic semiconductor?

Semiconductor Basics

A Group 3 impurity in a semiconductor acts as an acceptor, leading to a lack of electrons (holes) and a P-type semiconductor.

P-N Junction Formation

When different semiconductor materials are used without doping, a P-N junction is not formed.
A P-N junction can only be formed by combining a P-type and an N-type semiconductor.

Current Across a P-N Junction

Diffusion current across a P-N junction occurs due to the concentration gradient of electrons and holes.

Electron Diffusion in a P-N Junction

When an electron diffuses from the n-side to the p-side in a P-N junction, it combines with a hole, resulting in a depletion region.

Electric Field in a P-N Junction

An electric field develops in a P-N junction due to the separation of charge carriers, creating a depletion region.

Intrinsic Semiconductors

The pure form of a semiconductor is known as an intrinsic semiconductor.

Extrinsic Semiconductors

An N-type semiconductor is produced by adding a Group 5 impurity, such as phosphorus, to an intrinsic semiconductor.
Ionized phosphorus atoms added to silicon are called donors.
Intentionally added impurities, such as boron or phosphorus, produce an extrinsic semiconductor.
A P-type semiconductor is produced by adding a Group 3 impurity, such as boron, to an intrinsic semiconductor.

Learn about the concepts of intrinsic and extrinsic semiconductors in this quiz. Understand the differences between the pure form and impurity-added form of semiconductors.