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Why does an extrinsic semiconductor behave like an intrinsic semiconductor at high temperature?
Wiki User
∙ 11y ago
With the increase in temperature, the concentration of minority carriers starts increasing. Eventually, a temperature is reached called the critical temperature (85° C in case of germanium and 200° C in case of silicon) when the number of covalent bonds that are broken is very large and the number of holes is approximately equal to number of electrons. The extrinsic semiconductor now behaves essentially like an intrinsic semi-conductor.
Wiki User
∙ 11y ago
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Why intrinsic semiconductors behave like insulator at low temperature?
at low temperature its forbidden gap is very large so it act as a insulater.
Why the semiconductor behave like a insulator as a zero?
O K is absolute zero. At absolute zero, the electrons of the semi conductors are trapped and are immovable from their electron shell as they are in a low energy state. This makes the pure semiconductor an insulator. One must heat the semiconductor to give the electrons enough energy to move to free them from their electron shell, and thus conduct.
What are the essential differences between a semiconductor junction diode and a tunnel diode?
A: The essential difference is while it will behave like a normal diode at some at .6 forward voltage it has a negative impedance area before this point is reached it is not a very stable area to maintain and has the tendency to switch from one mode [low level] to the other .6v and very fast endeed.
Within a CPU a transistor act as?
In a microprocessor, field-effect transistors behave as electrically-controlled switches.
How does voltage and resistance behave in a series and a parallel circuit?
The current through each resistor is equal to the voltage across it divided by its resistance for series and parallel circuits.
What is an intrinsic semiconductor and what is an extrinsic semiconductor?
intrinsic semiconductor is an un-doped semiconductor, in which there is no impurities added where as extrinsic semiconductor is a doped semiconductor, which has impurities in it. Doping is a process, involving adding dopant atoms to the intrinsic semiconductor, there by gives different electrical characteristics
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.
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
Why intrinsic semiconductors behave like insulator at low temperature?
at low temperature its forbidden gap is very large so it act as a insulater.
Do compound semiconductors behave as intrinsic semiconductors?
Intrinsic refers to the doping -- intrinsic semiconductors are not doped. Whether compound or not, if they are not doped they are intrinsic.
Why pure semiconductor just behave like an insulator?
At absolute zero (0K), an intrinsic semiconductor will act like a perfect insulator. At this temperature, the electrons in the valence band will remain there. The heat energy required to excite the electrons from the valence band to the conduction band is insufficient at 0K. When the temperature increases, some of the electrons from the valence band got excited and moves to the conduction band. This will give rise to the conductivity of the semiconductor. i.e in 0 k(0 kelvin) the pure semi conductor the electrons in the valance band don't do any thing.They are lazy for conductivity.But when increasing the temperature increase the energy of electrons and they try to move.At the end electrons win and they can to move.So it happened a conductivity.
What is the difference between semiconductor and electronics?
A semiconductor is a device which is neither a Insulator nor a conductor. They behave like one in the right conditions.
Acceptor atom create in semiconductor crystals?
If an acceptor atom is placed in a pure semiconductor, it will accept one or more electrons from the valence band of the semiconductor. This will permit positive holes in the conduction band to carry electrical current - the overall result is that the material will behave as a p-type semiconductor.
Do incects behave differently depending on the temperature?
yes
Why the semiconductor behave like a insulator as a zero?
O K is absolute zero. At absolute zero, the electrons of the semi conductors are trapped and are immovable from their electron shell as they are in a low energy state. This makes the pure semiconductor an insulator. One must heat the semiconductor to give the electrons enough energy to move to free them from their electron shell, and thus conduct.
How substances behave according to kinetic theory?
i think its behaviour depends upon bonding and temperature.
How do solutes behave in a solvent?
strring , grinding, and temperature affect the speed which a solid dissolves in water.
