n-type Semiconductor

n-type Semiconductor

What is an n-type Semiconductor?

An n-type semiconductor is an intrinsic semiconductor doped with phosphorus (P), arsenic (As), or antimony (Sb) as an impurity. Silicon of Group IV has four valence electrons and phosphorus of Group V has five valence electrons. If a small amount of phosphorus is added to a pure silicon crystal, one of the valence electrons of phosphorus becomes free to move around (free electron*) as a surplus electron. When this free electron is attracted to the “+” electrode and moves, current flows.

* This free electron is the carrier of an n-type semiconductor.

Chapter I : Basis of Semiconductors

What is a Semiconductor?
Semiconductor Materials
p-type Semiconductor
What is a Compound Semiconductor?
What is a pn Junction?
Types of Semiconductor Devices

Related information