Questions tagged [semiconductors]
Semiconductors are materials with electrical conduction between that of conductors and insulators.
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Can alkaline earth chalcogenides be doped with halogens for conductivity?
Which salts, of all the binary alkaline earth chalcogenides with a 'rock-salt' structure, can be doped with halogen anions replacing some of the chalcogen, without destroying the lattice? (That is not ...
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2D semiconductors, and their practical applications
I understand that there are many complications with 2D semiconductors!(1) However, I wanted to know whether there are any practical uses of 2D semiconductors in consumer products.
I tried searching ...
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Can someone help with GAMESS input files for heavy atom calculations (MoS2, WS2, etc.)?
I'm doing computational research on transition metal dichalcogenides for my chemistry class and I want to calculate a transition state optimization for the reaction $\ce{MoS2 +N^- -> MoSN + S^-}$. ...
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Conductive ink on silicon to bridge two isolated regions of the wafer
Can I use a thin layer of conductive ink on silicon to bridge two isolated regions of the wafer (p-type)? I know that using PVD methods would be the best option, but I don't have access to these ...
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Why is the local coupling constant (vibronic coupling) given in eV?
Should the local coupling constant g not be without a unit, as the Holstein Hamiltonian suggests?
$
H=\underbrace{\sum_{P, Q} h_{P Q}^{(0)} a_P^{\dagger} a_Q}_{\text{Fixed geometry}}+\underbrace{\sum_{...
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What is the net gain of charge carriers in a semiconductor if an atom is removed?
In pure germanium, all Ge atoms are bonded with a tetrahedral geometry. It has a band gap and is a semiconductor. If we remove one Ge atom, what type(s) and how many charge carriers will be generated? ...
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Why is the Einstein relation not valid for germanium?
In Elecronic Devices and Circuits, by J Millman and CC Halkias, it is written at one place:
.....coefficient of diffusion $D$ and mobility $\mu$ aren't independent. The relationship between them is ...
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Why Lambert's law does not hold for photoresistors?
Why don't photoresistors made of Si obey Lambert's cosine law? Is it related to the dark current of the photoresistor? I couldn't find any solution while searching the web.
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Advantage of Ir-based vs Alq3 OLED material, is quantum yield more important over the cost?
This Wikipedia page https://en.wikipedia.org/wiki/OLED#Material_technologies mentions a couple of molecules that are used for OLED.
The Ir-based compound has ~ 100% quantum efficiency, while Alq3 may ~...
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Why exactly is the conduction band in semiconductors conducting?
Is it because when the electrons are excited to a higher energy level, they can lose energy and fall back down to lower energy levels? Due to the sheer number of antibonding MOs in the conduction band,...
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Why is cuprous oxide a p-type semiconductor?
Wikipedia — Copper(I) oxide says $\ce{Cu2O}$ has semiconducting properties without any explanation.
Nolan [1] talks about $\ce{Cu^+}$ vacancies making copper(I) oxide an extrinsic p-type semiconductor,...
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Polythiophenes versus Polypyrroles
I've been searching for the differences in semiconductor properties of polythiophene (pth) and polypyrrole (pry).
Most resources just state their ability to form polarons and can be doped. However, I ...
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Bond formations in doping of semiconductors [duplicate]
I was reading about semiconductors and found out that semiconductors are doped with either 13th group or 15th group elements which are named p-type and n-type semiconductors, respectively. In n-type ...
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What makes up the conduction band?
Prologue/Rant about online classes
We have been taught the electron sea model to explain metallic bonding and conduction of electricity by metals. Then out of the blue, the band theory was introduced, ...
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Is the case of the linear chain of atoms one-dimensional?
I am currently studying Diode Lasers and Photonic Integrated Circuits, second edition, by Coldren, Corzine, and Mashanovitch. In chapter 1.2 ENERGY LEVELS AND BANDS IN SOLIDS, the authors say the ...
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