Exploring the Effects of High Forward Bias on a P-N Junction Diode

In summary, if forward bias in a P-N junction exceeds the built-in potential, it would result in a situation where diffusion and drift currents would strengthen each other, leading to a very large current passing through the diode. This would be an ideal situation, but it may not be practical. In addition, if the drift current becomes strong enough to cause collisions with lattice atoms, it would create an electric field in the opposite direction of the equilibrium electric field. This would result in both drift and diffusion currents moving in the same direction, further strengthening each other and leading to the generation of new carriers. This would ultimately result in a very large current.
  • #1
hokhani
483
8
What would happen if forward bias in a P-N junction were more than built-in potential? Could we reach to this situation practically?
 
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  • #2
what do you think, and why?
 
  • #3
I think in this situation, diffusion and drift currents would strengthen each other and a very large current would pass through the diode and therefore it would be an ideal situation. Could you please guide me if I am wrong?
 
  • #4
What do you think would happen if the drift current magnitude got so strong that a charge carrier could collide with a lattice atom and knock another charge carrier out?
 
  • #5
I think an electric field would be made in the opposite direction of the equilibrium electric field, so that we have both drift and diffusion in the same direction strengthening each other, and due to collision with bound electrons in the new depletion region,new carriers would be made and drifted. therefore a very large current would be made. Could you please guide me.
 

1. What is a diode in a great forward bias?

A diode in a great forward bias is a type of electronic component that allows current to flow in only one direction. When a diode is in a forward bias, the positive voltage is applied to the anode and the negative voltage is applied to the cathode, allowing current to flow through the diode.

2. How does a diode in a great forward bias work?

A diode in a great forward bias works by allowing current to flow through it in one direction while blocking current in the opposite direction. This is achieved by the construction of the diode, which consists of a P-N junction that creates a depletion region. When a forward bias is applied, the depletion region becomes smaller, allowing current to flow through the diode.

3. What are the applications of a diode in a great forward bias?

A diode in a great forward bias has many applications in electronic circuits, such as rectifiers, voltage regulators, and signal demodulators. It is also commonly used in power supplies, lighting systems, and solar panels.

4. What are the advantages of using a diode in a great forward bias?

The main advantage of a diode in a great forward bias is its ability to regulate the flow of current in a circuit. It also has a low forward voltage drop, high efficiency, and can handle high power levels. Additionally, it is a small and inexpensive component, making it widely used in electronic devices.

5. Are there any disadvantages of using a diode in a great forward bias?

One potential disadvantage of a diode in a great forward bias is that it can generate heat when conducting large amounts of current. This can lead to overheating and potential damage to the diode. Additionally, the forward voltage drop can cause a loss of energy in the circuit. However, these disadvantages can be mitigated through proper circuit design and heat management.

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