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What else can I help you with?
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.
Is semiconductor controlled device is bipolar?
A semiconductor-controlled device, such as a thyristor, can be classified as a bipolar device because it utilizes both electron and hole charge carriers for its operation. In contrast to unipolar devices like MOSFETs, which rely solely on one type of carrier, bipolar devices can handle higher power levels and have different switching characteristics. This bipolar nature is crucial for their functionality in various applications like power control and switching.
Why n type and p type semiconductors have gauge factor as negative and positive respectively?
An n-type semiconductor is typically pure silicon, doped with a Group 5 element, such as gallium. Silicon has four (4) electrons in its valence shell, while gallium has five (5). Therefore, when they bond, the fifth electron is promoted to the conduction band as the other 4 have been filled up. This is also called a donor atom. Now, since there are free electrons in the conduction band, they carry 'extra' negative charge. Thus, it is called an n-type semiconductor. The p-type semiconductor is similar, except a Group 3 element is used, such as boron. This has 3 valence electrons, creating a positive charge carrier (hole) in the lattice. Thus, there are more positive 'charges,' making it a p-type semiconductor.
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.
What is the depletion layer in a semi conductor?
in correct sense it is not the layer but the region around the metallurgical junction which is depleted of charge carriers .in this region an internal electric field exist which counter balance the diffusion of electron and hole around the junction . basically the main reason for the formation of depletion region is the concentration gradient across metallurgical junction of p-n semiconductor.
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.
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 is the formula to calculate hole density in N-Type semiconductor when electron density and intrinsic carrier concentration is givenn?
The formula to calculate hole density in an N-Type semiconductor is (p = \frac{{n_i^2}}{{n}}), where (p) is the hole density, (n_i) is the intrinsic carrier concentration, and (n) is the electron density. This formula is derived from the law of mass action and represents the equilibrium condition where the product of electron and hole concentrations equals the square of the intrinsic carrier concentration in a semiconductor material.
What roles do free electrons and holes play in intrinsic semiconductor?
Free electrons and holes are the charge carriers-not only in intrinsic semiconductors(these are the purest form of semiconductors-typically as pure as can be made available with the present technology) but also in extrinsic semiconductors(doped semiconductors).In intrinsic semiconductors,electron-hole pairs are created due to the natural processes like-absorption of heat energy from the surroundingsabsorption of energy from photons.this absorbed energy results in breakdown ofcovalant bonds in intrinsic semiconductors as a result of which electron-hole pairs are created.It is this electron hole pair which is responsible for carrying the current through the intrinsic semiconductor when a potential difference is applied across it.In extrinsic semiconductor the case is slightly different-here, we have-majority charge carriers and minority charge carriers.in an n-type semiconductor-majority charge carriers are the electrons contributed by the pentavalent impurities while the minority charge carriers are the holes which are generated as electron-hole pairs due to natural processes discussed above.in p-type semiconductor-majority charge carriers are the holes contributed by trivalent impuritieswhereas the minority charge carriers are the electronswhich are generated as electron-hole pairs due to natural processes discussed above.these are the majority charge carriers which contribute heavily in the flow of current through the extrinsic semiconductors than the minority charge carriers.I suggest you to please go through mass action law and law of electrical neutrality of semiconductors for better understanding.
Describe the difference between majority and minority carriers?
FOR n-type semiconductor the majority charge carrier is electron and for n-type semiconductor it is hole. the majority and minority charge carrier is result of free electron and hole. the majority charge carrier is responsible for transport of electron.
Why hole has positive charge?
A hole in a semiconductor has a net positive charge because it represents the absence of an electron, which has a negative charge. When an electron moves from its position to fill the hole, it leaves behind a positively charged location or "hole." This movement of electrons creates a current flow in the material.
How do you calculate holes concentration?
Hole concentration can be calculated using the formula: p = n_i^2 / n where p is the concentration of holes, n_i is the intrinsic carrier concentration, and n is the concentration of electrons. This formula takes into account the charge balance in a semiconductor material.
What is a hole in atom?
A hole in an atom refers to the absence of an electron in a semiconductor material, effectively acting as a positive charge carrier. When an electron from a valence band moves to the conduction band, it leaves behind a vacancy, or "hole," that can move through the lattice as adjacent electrons fill the gap. This concept is crucial in understanding the electrical properties of semiconductors and is integral to the operation of devices like diodes and transistors. Holes, along with electrons, play a significant role in charge conduction in these materials.
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.
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.
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.
