Question

Classify the following as being either a p-type or an n-type semiconductor:

$\mathrm{B}$ doped with $\mathrm{Si}$

Answer 1

p-type semiconductor:

• A p-type semiconductor is known as an intrinsic semiconductor which is formed due to the dopping of III group elements i.e. Boron, Aluminium, and Thallium.
• p-type semiconductors are also defined as the positive type semiconductors having a deficiency of 1 electron.

n-type semiconductor:

• An n-type semiconductor is an intrinsic semiconductor that is formed due to dopping of Nitrogen, Phosphorus, Arsenic, Antimony, and Bismuth.
• An n-type semiconductor is also defined as a negative type semi-conductor having an excess of 1 electron.

$\mathrm{B}$ doped with $\mathrm{Si}$:

• $\mathrm{B}$ is a III group element and $\mathrm{Si}$ is an IV group element.
• When a III group element is doped with an IV group element, it generally creates an extra electron and forms the n-type semiconductor.

Hene, when $\mathrm{B}$ doped with $\mathrm{Si}$ , it creates an n-type semiconductor.