Question

a) What happens to the barrier potential when the temperature increases of diode?​

Answer 1

Answer:

Barrier potential is inversely proportional to the temperature. Higher the temperature, greater will be the mobility of charge carriers and lower potential difference across the junction can break the potential barrier.

Answer 2

Answer:

As the value of the temperature increases the value of the potential barrier decreases.

Explanation:

• In semiconductors, there's a layer close to the p-n junction that's partly without free charge carriers. This layer is called the depletion layer.

• For the diffusion of charge carriers from one vicinity to another, there may be a barrier throughout the junction called a potential barrier. This is the quantity of voltage that needs to be applied for the flow of free charge carriers.

• This barrier potential is directly proportional to the concentration of free charge carriers.

• Barrier potential is inversely proportional to the temperature. The higher the temperature the more can be the mobility of charge carriers, and a decrease in potential difference across the junction can break the potential barrier. But as the temperature lowers, the kinetic energy of charge carriers decreases and higher might be the value of the potential barrier.

Therefore, as the value of the temperature increases the value of the potential barrier decreases.

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