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I think it's just when a charge moves to an identical site in the organic semiconductor, i.e. it's a form of charge transport in which the overall properties of the semiconductor do not change because of it. I'm looking for a better definition myself so if you now know of one then please post it here :)
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∙ 14y ago
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Where does the charge concentrate in a semiconductor?
In a semiconductor, the charge concentrates at the bounds of the space charge region(depletion layer).
How many people were in charge of island hopping?
3 maybe
What is the difference between the minority charge carriers and majority charge carriers in diodes?
Majority charge carriers in the N-type side of a semiconductor material are electrons, because N-type semiconductor is doped with a material with 5 valence electrons. Semiconductor materials have 4 valence electrons and hold tightly to 8, so there is a "loose" electron for every atom of dopant. Therefore most of the charge carriers available are electrons. IE, electrons are the majority charge carriers. Minority charge carriers in N-type semiconductor are holes. Only a few holes (lack of an electron) are created by thermal effects, hence holes are the minority carriers in N-type material. The situation is reversed in P-type semiconductor. A material having only 3 valence electrons is doped into the semiconductor. The semiconductor atoms have 4 valence electrons try to hold tightly to 8, so there is a virtual hole created by a "missing" electron in the valence orbit. This acts as if it were a positive charge carrier. Most of the charge carriers are these holes, therefore in P-type semiconductor holes are the majority charge carrier. Again, reverse situation to minority charge carriers. Some electrons are loosened by thermal effects, they are the minority charge carriers in P-type semiconductor.
Is arsenic a semiconductor?
Arsenic is not a semiconductor by itself, but it is commonly used as a dopant in semiconductor materials like silicon to alter their electrical properties. Arsenic increases the number of available charge carriers in the material, which can make it conduct electricity more effectively.
Why do extrinsic semiconductor behave as good conductors?
we know that relation in semiconductor is conductivity proportional to temp especially in extrinsic semiconductor holes or electrons are charge carriers . in extrinsic semiconductor when temp is increased then the energy of charge carriers also increases. now kinetic energy equall to [ (1/2) m v^2 ] in this M is constant this implies energy prop to square of velocity therefore if conductivity of charge carriers increases while increasing of temperature
What is meant by intrinsic semiconductor?
Semiconductor in pure form (i.e. without doping) is called intrinsic or i-type semiconductor. The no of charge carrier in this case is determined by the materials itself only and not by the impurities. In an intrinsic semiconductor number of excited free electron is equal to the number of holes.
What is minority charge carrier?
In semiconductor devices there are two types of charge carriers: electrons and holes. In N-type doped semiconductor the majority charge carriers are electrons and the minority charge carriers are holes. In P-type doped semiconductor the majority charge carriers are holes and the minority charge carriers are electrons.Some kinds of semiconductor devices operate using minority charge carriers in part(s) of their structure. The common bipolar junction transistor is one of these, they are sensitive to a phenomenon called thermal runaway because additional minority carriers are produced as temperature increases. (field effect transistors however operate using only majority carriers and are thus not sensitive to thermal runaway)
Why does current stop at absolute zero in a semiconductor?
At absolute zero, semiconductor atoms come to a stop due to lack of thermal energy, reducing the number of free charge carriers available for conduction. Without free charge carriers, current cannot flow through the semiconductor, resulting in the cessation of electrical conduction at absolute zero.
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.
Is wood a semiconductor?
No, wood is not a semiconductor. Semiconductors are materials that have electrical conductivity between that of a conductor and an insulator, while wood is a natural organic material composed mainly of cellulose and lignin.
Why does an extrinsic semiconductor behave as an intrinsic semiconductor at elevated temperature?
...It is due to the fact that at higher temperatures, the energy in the semiconductor is greater than Eg by a considerable amount, meaning that the conduction band is more full. At these high temperatures, the dopants' role on electron-hole pairs is negligible.
How can semiconductor material be made to become either a conductor or an insulator?
Semiconductor material can be made to become a conductor by doping it with impurities that introduce extra charge carriers. This increases the material's conductivity. On the other hand, to turn semiconductor material into an insulator, it can be cooled to very low temperatures to reduce the thermal energy of the charge carriers, effectively halting conductivity.
