What is the effect resulting from the application of an electric field to the semiconductor?
When an electric field is applied to the semiconductor, both the free electrons (now residing in the conduction band) and the holes (left behind in the valence band) move through the crystal, producing an electric current.
What is the band structure of good conductors?
In a conductor the valence bands are not full and in effect the conduction band is continuous with the valence band. Thermal excitation ensures that the conduction band is always populated to some extent. Under the influence of an applied electric field, an electric current will flow.
What is electric field in semiconductor?
Charge carriers in semiconductors are negatively charged electrons and positively charged holes. … When an electric field is applied, the positve charge carriers move in the direction of the field and the negative charge carriers move against the field direction.
How does the electric field affect the movement of the charge?
The electric field will exert a force that accelerates the charged particle. The electric field has a direction, positive to negative. … If a positive charge is moving in the same direction as the electric field vector the particle’s velocity will increase. If it is moving in the opposite direction it will decelerate.
What is field effect explain briefly?
A field effect is the polarization of a molecule through space. The effect is a result of an electric field produced by charge localization in a molecule. … Field effects are relatively weak, and diminish rapidly with distance, but have still been found to alter molecular properties such as acidity.
What is conductor band?
The conduction band is the band of electron orbitals that electrons can jump up into from the valence band when excited. When the electrons are in these orbitals, they have enough energy to move freely in the material. This movement of electrons creates an electric current.
What is the band gap of conductor?
In a conductor there are no band gaps between the valence and conduction bands. In some metals the conduction and valence bands partially overlap. This means that electrons can move freely between the valence band and the conduction band.