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6 votes
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Why are silicon and germanium used as semiconductors but not other metalloids?

The statement, "metalloids like [a]ntimony and [t]ellurium are not used as semiconductors", is untrue: Tellurium thin-film transistors have been fabricated. Bismuth nanowires have been used ...
DrMoishe Pippik's user avatar
5 votes

Why is the Einstein relation not valid for germanium?

Quantitative explanations seems hard to come by in textbooks. In Andy Grove's (yes, the Intel guy) Physics and Technology of Semiconductor Devices (1967) one finds Experimentally, mobilities have ...
Jon Custer's user avatar
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5 votes

What is a covalent semiconductor?

Most semiconductors are inorganic solids but some polymers can be semiconducting and that is probably what the term "covalent semiconductor" is referring to. The majority of semiconductor material ...
matt_black's user avatar
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5 votes

Why is it important to minimize impurities when doping a semiconductor?

Semiconductors are based on impurities. They just call it doping. The addition of group 3 (Boron group) or group 5 (Nitrogen group) impurities create a hole or an extra electrno, respectively. ...
Lighthart's user avatar
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4 votes
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2D semiconductors and their practical applications

A looking for commercial 2D-semiconductor devices on the web showed only a few items, e.g., Search on "commercial graphene transistor" returned devices from MSE Supplies. Search on "...
DrMoishe Pippik's user avatar
4 votes
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Conductivity of Wüstite

after revisiting the problem I realised where I went wrong. The main mistake with not being careful with units and not reading the qurstion and having incorrect values for hole mobility. $$\text{mass}...
MrLuke370's user avatar
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3 votes
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What does "spin degeneracy" mean in this context?

I'm not a solid-state chemist, but I think the meaning seems reasonably clear from context to me. "Spin degeneracy" here means that each energy level is capable of holding a spin-up electron ...
orthocresol's user avatar
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3 votes

What is a covalent semiconductor?

A covalent semiconductor is one whose crystal structure contains covalent bonds. A covalent bond is one in which electrons are equally shared between the bonded atoms. Only silicon and germanium are ...
DrFalcon's user avatar
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3 votes

What is a covalent semiconductor?

Pure silicon (Si) and pure germanium (Ge) are examples of covalent semiconductors. To explain, first take a look at the difference between ionic and covalent bonding. In ionic bondig, the electron ...
Lucademicus's user avatar
2 votes

What are the oxidation states of galium and arsenic in GaAs semiconductor?

In general, gallium can have +1 and +3 oxidation states, though +1 is a very rare condition. In its turn arsenic possible oxidation states are -3, +3 and +5. As it is stated in Wikipedia, gallium ...
tenghiz's user avatar
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2 votes
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Why is the local coupling constant (vibronic coupling) given in eV?

The local coupling constant is typically given in units of energy, such as electronvolts (eV), because it represents the strength of the coupling between the electronic and vibrational degrees of ...
Hendrix13's user avatar
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2 votes
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Difference between vapor-phase transport and vapor-phase deposition?

The paper of interest is C.M. Wolfe et al., "Growth and Dislocation Structure of Single-Crystal Ga(As$_{1-x}$P$_{x}$)", Journal of Applied Physics 36(12) 3790 (1965). The key paragraph is: The ...
Jon Custer's user avatar
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2 votes
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Importance of zinc blende and wurzite crystal structures for semiconductors?

As suggested I can try to summarize the basic idea in an answer although I wouldn't say it solves the bounty. I'm also unsure why you even set the bounty for it. For this I'll quote the book that I ...
Justanotherchemist's user avatar
1 vote

Why is cuprous oxide a p-type semiconductor?

Let's start from here What are the holes here responsible for p-type semiconducting? and specifically discuss the difference between p-type, n-type and "none-type" semiconductors. Let's ...
permeakra's user avatar
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1 vote
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Is the case of the linear chain of atoms one-dimensional?

I don't believe the author is trying to compare 1D and 3D rigorously. A perfectly linear chain of covalently bonded atoms doesn't exist in isolation past 3-4 atoms, to my knowledge. (longer polyynes ...
Blaise's user avatar
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1 vote

Silicon–Boron Covalent Bond

Using your diagram, the boron-silicon bond with only the silicon electron has only half of the possible electron content. A "hole" as you said. The hole is not confined to the one $\ce{B-Si}...
James Gaidis's user avatar
1 vote

Importance of zinc blende and wurzite crystal structures for semiconductors?

Zincblende and wurtzite structures are not the only ones that afford semiconducting materials. This short list of narrow-gap semiconductors involves compounds with a variety of crystal structures. ...
Oscar Lanzi's user avatar
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1 vote

Conductivity of a semiconductor at high temperatures

A number of different things are going on in this scenario. First, the carrier concentration does increase steeply, although for Si at its melt temperature it is still only about 10$^{20}$/$cm^{3}$, ...
Jon Custer's user avatar
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