Is the phenomenon of radiative recombination exclusive to direct-gap semiconductors? If yes, please explain why it cannot occur in indirect-gap semiconductors. If not, please explain how it can occur in indirect gap semiconductors if it can.

Q: If an electron is travelling in a one dimensional crystal of length L, and lattice constant a, what…

A: In Direct Band Gap Semiconductor, the bottom of the conduction band and the top of the valence…

Q: In a p-type semiconductor with a defect-rich surface the surface recombination velocity is 104 cm/s.…

A: Given that In a p-type semiconductor with a defect-rich surface the surface recombination velocity…

Q: Explain the energy band diagram for a semiconductor with a neat sketch.

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: The electrical conductivities of most metals decrease gradually with increasing temperature, but the…

A: Most metals have positive temperature of coefficient of resistance implying that their electrical…

Q: For p-type semiconductors, holes are predominant charge carriers. TRUE FALSE

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Q: Consider a free electron moving in a pure 2D semiconductor. Assume that m and E are the mass and…

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Q: Calculate the thermal-equilibrium of electron concentrations per cubic centimeter in a compensated…

A: Given Temperature T                     = 27° C = 273 +27 = 300 K Acceptor concentration Na = 2×1015…

Q: A p-n heterojunction is formed though Semiconductor A intimately contacting with Semiconductor B.…

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Q: The conduction bands are full due to covalent bonds and the valance bands are empty in the…

A: The type of energy band formed after interaction of bonding orbitals are called valance band, and…

Q: What should be the width of the band gap of the semiconductor from which the LED that glows green is…

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Q: Why n-type and p-type semiconductors are electrically neutral?

A: When a pentavalent impurity atom is incorporated to a pure semiconductor to make it an n-type…

Q: In a light-emitting diode (LED), which is used in displays on electronic equipment, watches, and…

A: The energy of the light emitted is same as the energy of the band gap

Q: 8c.1. Show that the minimum of the semiconductor conductivity o= e(note + Poth) is when its electron…

A: The conductivity of a sample is given by: σ=en0μe+p0μh       1n0=electron concentration at thermal…

Q: Doping is necessary in order to enhance the conduction ability of a semiconductor. Support this…

A: In semiconductor production, doping is the intentional introduction of impurities into an intrinsic…

Q: Assume that a GaAs semiconductor has a lattice constant a=7.5 Å, and the atoms of Ga and As are hard…

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Q: A perovskite based semiconductor has a bandgap of 2.16 eV. Find the shortest wavelength of light for…

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Q: Calculate the semiconductor surface potential and gate voltage for the MOS structure in Figure 4.…

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Q: Explain direct and indirect bandgap semiconductors. Whal is the limitation of indirect bandgap…

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Q: A semiconductor is struck by light of slowly increasing frequency and begins to conduct when the…

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Q: Explain how the intrinsic carrier concentration of a semiconductor is created and why the intrinsic…

A: Silicon and germanium are examples of intrinsic semiconductors. When an intrinsic semiconductor is…

Q: if the energy gap is between( 1.2 1 p and 5) eV this is a semiconductor: conductor: insulator

A: Given: The energy gap is between (1.2eV and 5eV)

Q: When an electron in the compound semiconductor AlAs makes a transition from the conduction band to…

A: Given The wavelength of the emitted photon λ = 574 nm

Q: Explain Ohm’s law and show it graphically. Does Ohm’s law hold for semiconductor and with varying…

A: From Ohm’s law: The above expressions clearly explain that the potential is directly proportional…

Q: the carrier distribution in the conduction band is:nc(E) = gc(E) . f(E)   a) For a non-degenerate…

A: The objective of the question is to demonstrate that the carrier distribution in the conduction band…

Q: What is the maximum energy gap (in eV) of a semiconductor for which electrons can make the…

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Q: d. mass - 7kg 35° 5 m

A: We know that, work done is force times the displacement. However, here the distance is on an…

Q: a. In an p+-n- junction diode (NA >> ND), nearly all depletion is in the n-type region, and the peak…

A: we are instructed to answer only first three questions

Q: 4. Draw an energy level diagram showing the variation of the energy bands across a p-n junction in…

A: Note:Ec=Condunction BandEv=Valence BandEf=Fermi EnergyW=Depletion RegionEnergy level diagram for…

Q: Compound semiconductors can be doped to make n-type andp-type materials, but the scientist has to…

A: We know that Cd has two valence electron and Se has six valence electron making total 8 valence…

Q: The hall effect is much greater in semiconductor than in metal. Why? What practical results can we…

A: To determine the hall effect is much greater than semiconductors than in metal