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What is the gap between valance band and conduction band in a semi conductor?
Wiki User
∙ 14y ago
Conduction band - The unfilled energy levels into which electrons can be excited to provide conductivity.Valence band - The energy levels filled by electrons in their lowest energy states.
Wiki User
∙ 11y ago
Wiki User
∙ 14y agohttp://en.wikipedia.org/wiki/Band_Gap
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What are applications of direct and indirect band gap?
direct band gap means in e-k diagram valance bands are exactly below covalance band,in this band electron falls from the conduction band to valance band directly without going to metastable state and in indirect band gap the band electron falls from the conduction band to valance band by first going through the metastable state
What is the difference between the resistance of conductor and insulator?
Conductors allow most, if not all, electricity to pass through it. This is due to "wandering electrons" that aren't tightly bound to the nucleus of the conductor itself.Resistors conduct some, but not all electricity to pass. It somewhat resists it, hence resistors.Insulators do not allow electricity to pass through it due to the electrons being so tightly bound to the nucleus.
Why are metals thermally conductive?
Because metals are the good conductors of current. the conduction band and the valance band are overlap on each other,so when the current passes from the metal because of overlapping on both the bands current passes easily.
Difference between metal and semiconductor?
Semiconductor is not a single substance and so cannot be identified as either. Many semiconductors are made with metalloids, which have properties of both metals and nonmetals
Why conduction band and valence band partially filled?
No. Conduction band is basically the unfilled energy levels into which electrons can be excited to provide conductivity.
Is foam a good conducter of heat?
In a foam there is a large gap between the conduction band and the valence of band in the atoms makng up the foam. If any object is to conduct electricity through it the gap between the conduction band amd the valance should be minimun or overlapping so that the electrons in the valance band can go into conduction band and conduct electricity
What is semiconductor material?
Semi-conductor is a material in which the energy band gap between the conduction band and valance energy band is very less (around 1V) which is in between conductors and insulators So, with just a an excitation energy of around 1v changes the state of semi-conductor to wither conductor or insulator .
What is energy gap?
there will be only certain energy levels in which electrons get filled up. In valence orbitals there will be many such energy levels and the energy gap between conduction band and valence band is called energy band gap.
Why silicon has more barrier potential than germanium?
Due to variation in energy gap between valance band and conduction band....
Why is a rubber band an insulator?
The electron configuration of rubber (natural of artificial is such that there is a big gap between valance band and conduction band of electrons. Electrons has to make a transition from valence band to conduction band in order to conduct electricity.
Why is rubber a good electrical insulator?
The electron configuration of rubber (natural of artificial is such that there is a big gap between valance band and conduction band of electrons. Electrons has to make a transition from valence band to conduction band in order to conduct electricity.
What is a semi-conductor material?
Semi-conductor is a material in which the energy band gap between the conduction band and valance energy band is very less (around 1V) which is in between conductors and insulators So, with just a an excitation energy of around 1v changes the state of semi-conductor to wither conductor or insulator .
What is the connection between Fermi Level and Electronic Grade Materials?
fermi level:- This is the level of energy that lies in the forbiddan gap. It is the level of energy where the concentration of electrons in conduction band is equal to the concentration of holes in valance band. Since in intrinsic semiconductor the probability of electrons in conduction band is equal to the holes in valance band therefore lies exactly in the middle of fforbiddan gap In case of extrinsic semiconductor material, that depends what sort of dopping is there. If the donar impurity is there, it will shift towards conduction band, and if there is acceptor impurity it will shift towards valance band.
What is a difference between forbidden energy gap depletion region in semiconductor?
forbidden energy gap or energy gap or band gap or band or Eg is the gap between the top of the valance band and bottom of the conduction band. If we apply the energy equivalent to Eg then the electrons in valance band will jump to the conduction band. Ravinder kumar meena stpi n depletion region is the region in semiconductor where there is depletion of free charge carriers.Ravinder kumar meena stpi n
According to band theory mg is an insulator while in practice it is a conductor why?
According to band theory , the energy gap between valence band and conduction band was high. But during heating the energy gap get decreased. this is the reason why the mg behaves as an conductor.
What materials can be classified as conductor?
* Any element where the valence band of electrons overlap the conductance band is called conductors * The band gap between the Valance bond and conductance band is very low * Electrons are more in Conductance band
How does a conductor and insulator work?
CONDUCTORThe distance between conduction band and valence band is very small therefore an electron can easily jump to conduction band by overcoming weak nuclear forces. Hence, electric current can easily flow through it.INSULATORThe distance between conduction band and valence band is very large therefore an electron cannot jump to conduction band by overcoming weak nuclear forces. Hence, electric current cannot flow through it.
