Hello guys, I hope you all are doing great. In today’s tutorial, we will discuss the Difference Between Valence Band and Conduction Band. Both valence and conduction bands are energy levels which has some amount of energy difference. the valence band denotes the energy level of electrons existing in the outermost shell or valence shell of an atom.
While in conduction band such electrons exist that take part in the process of conduction. In today’s post, we will have a detailed look at both valence and conduction band to find their different parameter and compare them to discuss their differences. So let’s get started with Difference Between Valence Band and Conduction Band.
Difference Between Valence Band and Conduction Band
Valance Band
- The valence band is denoted with the VB.
- The location of this band is below the Fermi level.
- It is an electron orbital from which electrons can move to the condition band after getting excitation.
- The electrons existing In the most outer shell called the valence band.
- The energy gap between the valence gap and conduction gap called a bandgap.
- The existence of valence electrons explains the chemical feature of any component.
- For the main group, the valence electrons rely on in the outer shell of the electron, and in transition metal exist in the internal shell
- Due to the exterior excitation process electron left the valance band.
- Due to the existence of electrons valance band is partially or completely filled.
- The energy state of this band is less.
- In this band, there are a large number of electrons present.
- The force exerted on this band due to the nucleus is stronger.
Conduction Band
- This band is orbited in the atom where the electrons go after excitation from the valance band.
- In orbits, electrons can move freely and cause the flow of current
- The conduction band is denoted with the CB.
- Conduction band present over the Fermi level.
- Due to exterior excitation electrons enter the conduction band.
- Its energy state is larger than the valance band.
- The concentration of electrons in this band is less.
- The force exerted on the valance band due to the nucleus is less strong.
- The conduction is not filled or partially filled
Valence Band vs. Conduction Band
Valence Band
- The energy band that comes with valence electrons is called the valence band.
- The valence band is denoted as VB.
- • The valence band exists below the Fermi level or forbidden energy gap in the energy band diagram.
- Electrons in this band are called valence electrons.
- The energy of valence band electrons is less than that of free electrons and Fermi energy.
- Electrons are released from the valence band when external energy is provided.
- The strong nuclear forces work on the valence band; electrons in this band are strongly connected with a nucleus.
- This band is low-energy-level electrons. The valence band is completely or partially filled with electrons.
- The electron density of the valence band is high because it has more electrons per unit volume.
Conduction Band
- The energy band that comes with conduction or free electrons is called the conduction band.
- This band is denoted with CB. The conduction band exists over the Fermi level of the energy band diagram.
- Electrons in the conduction band are called free electrons or conduction electrons.
- Electrons reach the conduction band when they get power from external sources.
- • The conduction band comes with higher energy than the Fermi energy and the energy of valence electrons.
- The weak nuclear forces work on the conduction band, showing that conduction band electrons have weak attrition forces for the nucleus.
- Electrons in the conduction band are high energy levels, and it can either be empty or partially filled with electrons.
- It has a low electron density.
What is the conduction band to the valence band?
- The difference between valence and conduction bands is the band gap. Between the valence band and the conduction band, there is a hypothetical energy level called the Fermi level that, for thermodynamic equilibrium, comes with a 50 percent chance of occupied electrons.
Do electrons move from the conduction band to the valence band?
- The conduction band is a band of electrons or orbitals that electrons move there from the valence band in an excitation state. If electrons are in these orbitals and come with enough energy to move freely in materials, that movement of electrons makes current.
What is the forbidden gap between the valence band and the conduction band?
- The distance between the valence band and the conduction band is called the forbidden energy gap. If electrons are transferred from the valence band to the conduction band, an external power source is used that is equal to the forbidden energy gap.
What separates the valence and conduction bands?
- The certain energy separated two different energy levels of the conduction band and the valence band. The basic difference between the valence band and the conduction band is that the valence band defines the energy level of electrons in the atomic structure’s valence shell.
That is a detailed post about the difference between conduction band and valence band. If you have any query ask in comments. Thanks for reading. have a good day.
