This simple animation video clearly explains the topics P-N junction semi conductor or diode, what is forward bias and reverse bias, what is diffusion current and drift current, what is avalanche breakdown etc What is a P -- N junction semiconductor and how is it formed? The PN junction semi conductor is a combination of P type semiconductor with N type semiconductor to achieve the practical utility of both. It's formed, when a P type semi conductor is joined to an N type semiconductor. The P type semiconductor has free holes with positive charged and the N type semiconductor has free electrons with negatively charge. What happens when a PN junction is made? When P and N semiconductors are joined to make the PN junction semiconductor diode, the electrons near the PN junction jump from N to P and holes near the junction jump from P to N. This phenomenon creates a space charge region or a depletion layer as shown in the video. At this space charge region due to the movement we have electrons in P region and holes in N region. For some time the electrons move back from P to N in the space region or depletion layer and some holes move back from N to P in the space region. This continues to happen till equilibrium is reached. This movement of electrons and holes in the space region or diffusion layer gives rise to Diffusion current. What is Forward bias and how does it occur? Forward bias occurs when the positive terminal of battery is connected to the P region and the negative terminal of battery is connected to the N region. In this condition what happens is the positive terminal repels the holes towards the junction and the negative terminal repels the electrons towards the junction. Due to this repulsion, the depletion region or space region narrows down as shown in the video. But at a particular condition, If the voltage in the forward bias is above a specified range, the electrons in the N region drifts through the junction and migrates to the P region and the holes in the P region drifts through the junction and migrates to the N region. Now the current flows across the circuit and this current are called the Drift current. What is Reverse bias and how does it occur? Reverse bias occurs when the negative terminal of the battery is connected with the N region and positive terminal with the P region. In this condition holes (positively charged) from the P region get attracted to the negative terminal of the battery and electrons (negatively charged) get attracted to the positive terminal of the battery. This results in the depletion layer to widen up. Now the PN junction acts as an insulator and will not allow any current to flow in the circuit. But at a condition, if the battery voltage is above a particular limit, which is called as the reverse bias breakdown voltage level. Electrons and the holes breakdown through the PN junction and cross over resulting in the current to flow through the circuit. This break down is called avalanche breakdown In this process the current flowing through the PN junction is very high and ultimately the PN junction gets damaged due to overheating caused by the excess flow of current. This is how a PN junction semiconductor works. ------- As you all know there are many technical video been uploaded on our YouTube channel https://www.youtube.com/user/TechTrixInfo you can also watch these video from our web site www.TechTrixInfo.com These are some of our famous tutorial video: How to drive n Operate a JCB BHL Machine: https://www.youtube.com/watch?v=d0QsBcyuQKw&list=TLxVT-8RVZwj6rt8TF6qQASojgB2HyFj6A How piston pump works: https://www.youtube.com/watch?v=BEpQFZ5BG8c Animation - How Clutch Works: https://www.youtube.com/watch?v=H7Iay0Ke_t4&list=TLEAR3w8CXdzQVx8Wk-RWxgIKniXTYNllp How fuel injection pump works: https://www.youtube.com/watch?v=HVIE36oIR1s&list=TLbG7_oGzfXfRpBh5Sa-6bA0OGexW_wY2T How Hydraulic Ram Works: https://www.youtube.com/watch?v=svdsbL4PLL4&list=TLsKtRNvm03sqKvd1AwOEbOsWZZezoXJ5z We are also having a drawing video tutorial channel: https://www.youtube.com/user/EthansHowToDaw Answer to all the below questions are available in this video: How pn junction diode works. How diode works, animation diode, animation pn junction, working of pn junction, how does a pn junction semiconductor works, what is avalanche breakdown, what is drift current, how drift current forms, what is space charge region, how space charge region forms, what is depletion layer, how depletion layer formed, how an electric field is formed in pn junction, what is forward bias, what is reverse bias, how forward bias occurs, how reverse bias occurs, what is diffusion current, how diffusion current is formed.
- What are Diodes? - Types of Diodes - Applications of Diodes - PN Junction Diode - Construction - Working - Forward Bias, Reverse Bias and thei
We will see what a diode does, and then begin to understand why. We'll investigate the structure of silicon and other group (IV) elements. We will discuss dop
A SIMPLE explanation of a Diode. Learn how a Diode works through diagrams and example. Want to know more? Read the full article on the working principle and typ
Watch this video to know more about the formation of P-N junction diode, its V-I characteristics and P-N junction diode breakdown mechanism. Department: Electr
We make it Ez for you to understand What are Semiconductors, Conductors & Insulators ? What are Intrinsic & Extrinsic Semiconductors ? and What are P Type & N T
In this video, Mr. Adams explains how PN Junctions are used in silicon photovoltaic devices (solar cells) to create electricity. He attempts to explain a very d
http://www.green-translation-service.com This video puts the complexity of solar energy and solar cells into plain English.
P-N Junction (Diode) Watch More Videos at: https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Pradeep Kshetrapal, Tutorials Point India P
Dear friends, Please support us at Patreon, so that we can continue our free educational service https://www.patreon.com/LearnEngineering The invention of tran
Video 3 in the series shows how semiconductors (Silicon) can be produced as diodes and transistors and how this all arises as a consequence of quantum mechanics
What are the basics of the working principle of a solar cell and what is it made of? How can we characterise the performance of a solar cell? What is the IV cur
Physics, Class XII Chapter: semiconductor Topic: formation of P-N junction. Classroom lecture by Pradeep Kshetrapal. Language : English mixed with Hindi.
The PN Junction. Developed under Teaching Innovation Project 11-293 of Universidad de Granada (Spain) Creative Commons By-NonCommercial-NonDerivs. English versi
Higher Physics - second in a series of 3 videos on semiconductors. This video covers the formation of the p-n junction and how it performs when forward and reve
A SIMPLE explanation of the working principle of a Diode. Understand exactly how a diode works, the characteristics of a diode, and forward and reverse bias. Re
Analog Electronics: PN Junction Diode (No Applied Bias) Topics Covered: 1) PN Junction. 2) PN Junction Diode. 3) Meaning of Biasing. 4) Diffusion and Diffusion
The electronics of the solar cell is presented including the PN junction diode. The electrical model of the solar cell is presented along with the solar cell v
diffusion current, drift current, depletion region, barrier potential
STOP! WATCH THIS VIDEO FIRST: http://youtu.be/b3xys6rYM_Q You may continue only if you feel comfortable with these concepts: donor, acceptor, electron, hole