Question

1) Two extrinsic materials with different band gaps, but each less than 2 eV, are kept in contact with each other are in equilibrium with each other. It 1
Implies are same at the contact points.

Optical transparency

Chemical potential

Thermal conductivity

Fermi Energy

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Answer 1

Answer:

Fermi energy

Explanation:

The Fermi Level is the energy level which is occupied by the electron orbital at temperature equals 0 K.

Answer 2

Given: Two extrinsic materials with different band gaps, but each less than 2 eV, are kept in contact with each other are in equilibrium with each other.

To Find: It 1 Implies are same at the contact points.

Optical transparency

Chemical potential

Thermal conductivity

Fermi Energy

Solution:

• When two extrinsic materials with different band gaps, but each less than 2 eV, are brought into contact with each other, there will be a transfer of electrons at the contact surface due to the difference in the Fermi levels. This electron transfer will continue until the Fermi energies of the two materials are equalized at the contact point.

• The energy is 50% solid electron at zero temperature. It determines the maximum energy of an electron in a solid at an absolute zero temperature. The Fermi energy is determined by the number and distribution of electrons in the material and is independent of the band gap.

• So, when two extrinsic materials with different band gaps but each less than 2 eV are brought into contact, the Fermi levels of the two materials will be aligned, and the Fermi energy will be the same at the contact points. This alignment of Fermi levels results in a state of equilibrium between the two materials.

• Optical transparency,  While these properties may be influenced by the band gap or other electronic properties of the materials, they are not directly affected by the alignment of the Fermi levels at the contact point.

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