Surface recombination velocity of electron

In summary, the transport of minority carriers at the metal semiconductor contact is described by the surface recombination velocity. This velocity is dependent on the details of the contact, such as the type of materials involved. Usually, the velocities of electrons and holes are different at the same contact. Experimentation is often necessary to determine the specific values of these velocities. The Fermi velocity is not directly related to recombination at the contact.
  • #1
sarah1
6
0
at the metal semiconductor contact the transport of minority carriers is describe by surface recombination velocity, what s the surface recombination velocity for electron and hole at the same contact?
 
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  • #2
I'm not entirely certain that I understand the meaning of "recombination velocity" but if you mean what is the velocity of charge carriers that are recombining then it would be the Fermi velocity.
 
  • #3
It has nothing to do with Fermi velocity. And Fermi velocity has nothing to do with recombination either...
To the OP: The surface recombination velocity depends on the details of the contact. Usually electron and hole velocities are different depending on the type of contact, and the materials involved.

For instance, a ferromagnet contact will make it harder for the minority spins to recombine at the surface...

Usually though, transport is well described by either holes or electrons, ambipolar transport (where both hole and electron conduction happen at the same time) being a rare phenomenon.

Most of the time, since no one exactly knows the details of the contact, experimental benchmarking is the way to go if you are trying to get a number or do an analysis.
 

What is surface recombination velocity of electron?

Surface recombination velocity of electron is a measure of how quickly electrons are lost at the surface of a material. It is an important parameter in the study of semiconductors and other materials used in electronic devices.

How is surface recombination velocity of electron measured?

Surface recombination velocity of electron is typically measured using techniques such as photoluminescence, time-resolved photoluminescence, and microwave photoconductance decay. These methods involve shining light or microwaves on the surface of the material and measuring the resulting electron emission.

What factors affect the surface recombination velocity of electron?

Several factors can influence the surface recombination velocity of electron, including the material properties (such as doping concentration and defect density), surface conditions (such as roughness and contamination), and external factors (such as temperature and light intensity).

Why is surface recombination velocity of electron important?

Surface recombination velocity of electron plays a crucial role in determining the efficiency and performance of electronic devices. High surface recombination velocity can lead to a decrease in device performance and reliability, while low surface recombination velocity is desirable for efficient device operation.

How can surface recombination velocity of electron be controlled?

The surface recombination velocity of electron can be controlled through various methods, such as surface passivation techniques, surface treatments, and material engineering. These methods aim to reduce surface defects and improve the surface quality of the material, thereby decreasing the surface recombination velocity of electron.

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