Last updated on Monday, October 24th, 2022

P-N Junction Diode Introduction:

In this lecture, a p-n junction formation and working is explained by using animation and other scientific tools. As you know that p-n junction diode is the basic building block of all semiconductor devices. So its understanding is the foundation in the electronics. If somehow you use the wrong symbols then it is difficult to understand. Otherwise, it is more enjoyable than all other branches of physics.

p-n Junction Diode Working

In the first part of the video lecture, the formation of a junction diode is explained by using animation. So beginners can also visualize the facts, of how the depletion region formed.  Your explanation of the diffusion and drift processes you can see. Then after the diffusion and drift current on its basis discussed here.

Understanding of majority and minority charge carriers in n-type and p-type semiconductors and the a new concept of barrier potential is introduced clearly. So one can understand it for future purposes. Here semiconductor devices are explained on the basis of band structures. What is the equilibrium condition and when diffusion current equals to the drift current are explained? Answered so many questions which arise to understand the working of the p-n junction diode.

Characteristics of Diode

With the help of a proper circuit diagram, the V-I characteristics are discussed in both cases whether that is of forward or reverse bias. Here I did also use dynamic resistance to explain it. As shown in reverse bias the semiconductor diode provides resistance in mega ohms.  Because of that reason current flows in only one direction i.e. the forward biasing.

http://apniphysics.com/basics-of-semiconductor-laser-part-1/

Read Also: Basics of Semiconductor LASER

At the last, the main application of the semiconductor diode is explained in Light emitting diode, signal diode, transistors, and many other electronic devices.

If you have any doubts or questions you can ask just to write in the comment box.