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When an electron is displaced in a semiconductor the hole that left behind is?
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∙ 14y ago
A lack of electron
Wiki User
∙ 14y ago
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What is the term for a semiconductor that is missing electrons?
p-type semiconductor A semiconductor that is missing electrons is called an electron hole.
Give some Examples of direct and indirect band gap semiconductors?
direct band gap-semiconductor in which the bottom of the conduction band and the top of the valence band occur at the momentum k=0;in the case of d.b.s. energy released during band-to-band electron recombination with a hole is converted primarily into radiation (radiant recombination); wavelength of emitted radiation is determined by the energy gap of semiconductor; examples of d.b.s. GaAs, InP, ZnS, ZnSs, CdS, CdSe etc. indirect bandgap semiconductor --semiconductor in which bottom of the conduction band does not occur at effective momentum k=0, i.e. is shifted with respect to the top of the valence band which occurs at k=0; energy released during electron recombination with a hole is converted primarily into phonon; e.g. Si, Ge, GaP, GaAsp ,Ge etc, .
Which of the two semiconductor material Si or Ge has larger conductivity at room temperature?
Ge has higher conductivity than Si. Because at room temperature the electron and hole mobility for Ge is larger than those of Si. Another explanation is the lower band gap of Ge than Si.
How does a phototransistor work?
All bipolar transistors are light sensitive: photons striking the semiconductor create electron-hole pairs which make the transistor conduct.In ordinary transistors this is an undesirable source of noise, so they are packaged in opaque metal or plastic cases.A phototransistor on the other hand is packaged either in a metal case with a transparent lens or in transparent plastic to let light in.Note: this is not a significant effect with MOS transistors.
What are degenerate and non degenerate semiconductors?
Non degenerate semiconductors are those which: -are lightly doped -have less value of electron and hole concentration -violate Pauli's exclusion principle Degenerate semiconductors are those which: -are highly doped -have high value of electron and hole concentration -follow Pauli's exclusion principle
When an electron is displaced in a semiconductor the hole thats left behind is what?
When an electron is displaced in a semiconductor, the hole that is left behind is called an electron hole. Energy can still be conducted because other electrons can and do jump to the space left by a displaced electron.
What is a bound hole electron pair in a semiconductor?
exciton
What is the term for a semiconductor that is missing electronic?
p-type semiconductor A semiconductor that is missing electrons is called an electron hole.
What is the the term for a semiconductor that is missing electrons?
p-type semiconductor A semiconductor that is missing electrons is called an electron hole.
What is the term for a semiconductor that is missing electrons?
p-type semiconductor A semiconductor that is missing electrons is called an electron hole.
When an electron is displaced in a semiconductor the hole thats left behind is?
a. attracted to the negative terminal of the voltage source as an electrons leave its orbit it leave a hole which is promptly filled by another electron. so as electron flow one way the holes flow the opposite direction. in electronics current flow from positive charge to a less positive chargeclassified as a "hole". Although it doesn't really *exist, it is thought to have the same charge as an electron but opposite polarity.
Why p type semiconductor has majority charge carrier as hole?
The majority carrier in p-type semiconductor is the hole. Electron carriers in p-type semiconductor are minority carriers. Minority carriers in any semiconductor are produced mainly by heat. Only at absolute zero temperature would there be no minority carriers.
What is need to study about hole curren when there is actually electron current which is involved?
actually it is the holes which lead to the movement of the electron,as electron moves to the hole's place creating a hole behind.
How do you Define the mobilty of charge carrier?
I am assuming the charge carries are electron and hole in an semiconductor. the mobility of charge carriers can be understood as the easy with which the carrier can move in a semiconductor. the mobility depends on many factors like the semiconductor material (because of the crystal structure), semiconductor specimen temperature, the effective mass of carrier, the applied electric field across the specimen. in general if we compare the mobility of electron with hole in a silicon semiconductor, the mobility values at room temperature is some thing around 1350 cm^2 per volt sec and 450 cm^2 per volt sec for electron and holes. that is mobility of electron is 2-3 time more than the holes in silicon.
What do you understand by a semiconductor?
A p-type semiconductor (p for Positive) is obtained by carrying out a process of doping by adding a certain type of atoms (acceptors) to the semiconductor in order to increase the number of free charge carriers (in this case positive holes). When the doping material is added, it takes away (accepts) weakly bound outer electrons from the semiconductor atoms. This type of doping agent is also known as an acceptor material and the vacancy left behind by the electron is known as a hole
What is the formula to calculate hole density in N-Type semiconductor when electron density and intrinsic carrier concentration is givenn?
p = ni^2/n
Do semiconductor holes have mass?
no!!!!! holes in semiconductor have no mass! the conventional way to represent holes as positively charged so there should be a question in our mind that they should have some mass,as proton, the only positively charged particle have mass,but it hasn't.actually the electrons are carrying charge in everywhere,the opposite direction of flow of current considered as the direction of conventional current, In the semiconductor also only electron carry charges,so the excessiveness of electron defined a semiconductor as n-type,or donor type(due to doping,i.e.,mixing some impurities with the semiconductor and make the semiconductor to make covalent bond with that element).and where the semiconductor is doped with some element of having only three electrons at the valence cell,the covalent bond have a shortage of electrons to complete the total covalent bond,so the semiconductor become available to add another electron to compete the covalent bond.and hence they are called p-type or acceptor type.so hole is nothing but a convention to denote this lack of electron,i.e.,lack of negative charge and it seems like the semiconductor have a positive charge that balance the electron.so the hole must not have any mass. electron have a mass-1.6*10^-19 kg
