Effect of Temperature on Semiconductor

What are Semiconductors?

It is defined as the material that shows both the properties of the conductor and the insulator in different conditions. The conductivity of a semiconductor lies between the conductor and the insulator. Some examples of elementary semiconductors are silicon (Si) and germanium (Ge)....

Effect of Temperature on Semiconductor

Case 1: When the temperature is equal to 0k....

Properties of Semiconductors

There are two charge carriers present in the semiconductors, i.e. an electron and a hole. The hole is considered the imaginary charge carrier in the semiconductor. Electrons and holes both have the same magnitude of charge but opposite signs. The mobility of a hole is less than the mobility of an electron. The net current of the semiconductor is due to the movement of electrons and holes, i.e Itotal = Ie + Ih The net conductivity of a semiconductor is also due to both charge carriers, i.e σtotal = σe + σh...

Types of Semiconductors

Based on the number of electrons and holes, there are two types of semiconductors: Instrinc and Extrinsic...

What is Doping?

As we discussed, the conductivity of intrinsic semiconductors is very low, so to increase the conductivity of the semiconductor we add some impurity atoms to the semiconductor, which are known as dopants, and the process is known as doping....

Types of Extrinsic Semiconductor:

Depending on the type of dopants we use, there are two different types of extrinsic semiconductors formed:...

Conclusion

In this article, we learn that a semiconductor is a type of material that shows both the property of conductors and insulators, its classification is based on energy band theory and different properties like having two different charge carriers: electron and hole respectively. Then we classify semiconductors into two different types: intrinsic and extrinsic, based on the number of electrons and holes present in the crystal. Due to the low conductivity of intrinsic semiconductors, we made extrinsic semiconductors by adding some impure atoms in them, to increase their conductivity, and this leads to the formation of two different types of extrinsic semiconductors: N and P-type semiconductors. In N-type semiconductors, the majority charge carriers are: electrons and minority charge carriers are: holes. On the other hand in P-type semiconductors, the majority of charge carriers are: holes and the minority of charge carriers are: electrons. Extrinsic semiconductors are used in various practical devices such as P-N Diode, ICs, Solar cells, sensors, and in detectors....

FAQs on What is Extrinsic Semiconductor?

Q.1: Does extrinsic semiconductors are electrically neutral?...