Valance band to Conduction Band (Valance Electron), Energy Band Gap Levels

In summary, the conversation discusses the calculation of energy gap for periodic elements, specifically for valance electrons crossing from valance band to conduction band. The speaker is looking for a list of energy gap energy and how to obtain it through calculation or experimentation. They also mention the need for additional constants and data, such as wavelength or frequency, to accurately calculate the energy gap. The expert recommends referring to a solid state physics book for more information.
  • #1
GoldenAtlantis
15
0
I am looking to calculate the energy gap of for starters periodic elements and were wondering how we could get the list and calculation. Is there a table somewhere based on certain temperatures and constants of energy gap level? We would like to get a list of the energy gap energy for valance electrons. This would be for crossing from valance band through the energy band gap to the conduction band. We were wondering if this is calculated or experimentally determined (With photon, heat, spectrometer, etc). So that we could extrapolate out to other elements; if we had these constants how could we get the energy level?

Example:
Material: Solid, Element: Tin (Sn), Valance electrons: 4, Temp: 300K, Pressure: Ambient, Quantity of atoms: 1 atom, Velocity: Not sure, Density: at moment one atom, Not sure if this has effect (Fermi), Fermi Energy: 12.2 eV, Fermi Temp: 11.8x10^4K, Fermi Velocity: 1.9x10^6 m/s, Free electron density: 14.8 N/Vx10^28/m^3

What elements of above or missed data would be needed to calculate energy gap level at various temps/pressure? Or is the gap not calculated and experimentally determined (If so is there a table at some constants), if so any table/source for elements and compounds would be helpful.

Tried these but you need the wave length or frequency which would mean table. E=hc/λ, E=hf

Thanks, any sources to review or read would be great.
 
Physics news on Phys.org
  • #2
Well, tin is a metal, so it doesn’t have a band gap. I would recommend a decent introductory solid state physics book to get you started (Kittel, for example).
 

1. What is the Valance band and Conduction band?

The valance band and conduction band are energy levels within a material that determine its electrical conductivity. The valance band is the highest energy level that is completely filled with electrons, while the conduction band is the next highest energy level that has the potential to conduct electricity.

2. What is a Valance electron?

A valance electron is an electron in the outermost energy level of an atom. These electrons are responsible for the chemical properties of elements and play a crucial role in determining the electrical conductivity of materials.

3. What is the Energy Band Gap?

The energy band gap refers to the energy difference between the valance band and the conduction band in a material. It represents the minimum amount of energy needed for an electron to move from the valance band to the conduction band.

4. How does the Energy Band Gap affect a material's properties?

The size of the energy band gap determines a material's electrical conductivity, as well as its optical and thermal properties. Materials with a small band gap (such as metals) have high electrical conductivity, while materials with a large band gap (such as insulators) have low conductivity.

5. Can the Energy Band Gap be manipulated?

Yes, the energy band gap can be manipulated by introducing impurities or defects into a material, a process known as doping. This can change the number of available electrons in the valance or conduction band, and thus alter the material's conductivity.

Similar threads

  • Advanced Physics Homework Help
Replies
2
Views
1K
  • Advanced Physics Homework Help
Replies
1
Views
696
Replies
7
Views
1K
  • Atomic and Condensed Matter
Replies
2
Views
1K
  • Advanced Physics Homework Help
Replies
1
Views
1K
  • Advanced Physics Homework Help
Replies
1
Views
919
  • Atomic and Condensed Matter
Replies
1
Views
1K
  • Advanced Physics Homework Help
Replies
1
Views
1K
  • Atomic and Condensed Matter
Replies
2
Views
2K
  • Atomic and Condensed Matter
Replies
11
Views
2K
Back
Top