Question

EXTRINSIC
SEMICONDOCTORS​

Answer 1

$\huge{\underline{\underline{\bold{\green{Answer:-}}}}}$

• Intrinsic semiconductors
• Extrinsic semiconductors

The conductivity of an intrinsic semiconductor depends on the surrounding temperature. At room temperature, it exhibits a low conductivity. Due to its low conductivity, it is deemed unsuitable for use in electronic devices. In order to deal with this problem, the concept of doping arose, and as a result of which extrinsic semiconductors were manufactured. In this section, we will discuss what extrinsic semiconductors.

Why are Semiconductors Doped?

Extrinsic semiconductors are semiconductors that are doped with specific impurities. The impurity modifies the electrical properties of the semiconductor and makes it more suitable for electronic devices such as diodes and transistors.

While adding impurities, a small amount of suitable impurity is added to pure material, increasing its conductivity by many times. Extrinsic semiconductors are also called impurity semiconductors or doped semiconductors. The process of adding impurities deliberately is termed as doping and the atoms that are used as an impurity are termed as dopants. The impurity modifies the electrical properties of the semiconductor and makes it more suitable for electronic devices such as diodes and transistors.