Questions tagged [semiconductor-physics]
Semiconductor physics is the branch of solid state physics that focuses on specific properties of semiconductors. It studies dynamics of different perturbations (mainly electrons and holes) in the semiconductor crystal and the ways to harness it in electrical circuits.
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Can diamonds be annealed like silicon?
Annealing is an important step in semiconductor fabrication. The doping of silicon crystals is done by ion implantation which creates a lot of defects in the crystal lattice. Heating the crystals for ...
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Threshold voltage equation for a MOSFET
I have encountered the equation of threshold voltage for a MOSFET as
$$ V_{th} = \phi_{ms} + \frac{Q_{ox}}{C_{ox}} + 2\phi_f + \frac{Q_{dep}}{C_{ox}} $$
I understand that the components are as follows:...
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Join Density of States Multiplying Probabilities
In the derivation of the radiative recombination rate in a direct bandgap semiconductor, my optoelectronics textbook first introduces what it calls the joint density of states (also referred to as the ...
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Piezoelectric microphone element is activated by green or 405nm UV laser light but not 650nm red light. Why?
I built a high gain amplifier taking its input from a piezoelectric sensor. The sensor is a circular disk of what looks like brass with diameter 15mm where the brass thickness is around 0.14mm. On top ...
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Modelling thermal transport - book recommendations
I’m looking for good resources or books that discuss thermal resistivity of materials, especially semiconductors, with a focus on experimental models and research.
Most of the resources I’ve found so ...
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Is thermal equilibrium required for ($n = p = n_i$) in intrinsic semiconductors?
I’m confused about a statement I often see in textbooks:
In intrinsic semiconductors, the number of free electrons $n$ equals the number of holes $p$.
I understand that in an intrinsic semiconductor,...
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Why do we need to use laser pulses for Atom probe tomography of insulators and semiconductors?
From the research I have done the larger penetration of externally applied $E$-fields into insulators and semiconductors (due to less internal shielding) worsens the spatial resolution since a ...
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Hole density of PN junction in reverse bias
I'm trying to calculate the hole density along the length of a simple PN junction in reverse bias, $V_B$. In particular, I would like to compute the minimum density p_min shown in the attached graph.
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Meaning of band gap structure [closed]
In a hydrogen atom, the electron can take only certain energies (quantized energies) only. When two hydrogen atoms come close, the electrons can take up more energy states but still the states are ...
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How does surface dipoles cause negative electron affinity in hydrogen terminated diamond?
I am currently researching about hydrogen terminated diamond, in this paper https://doi.org/10.1103/PhysRevLett.81.429 , it is mentioned due to the dipole layer at hydrogen terminated diamond surface, ...
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Semiconductors and holes
Hello I am a 12th grade student preparing for Jee and just started learning about semiconductors, I wanted to ask that in pure silicon semiconductors, when a electron is released and goes into the ...
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Fermi level in n-type semiconductors at $0\,\text{K}$
Why does the Fermi level lie between donor level and conduction band in n-type semiconductors at $0\,\text{K}$? Why donor level isn't the Fermi level at $0\,\text{K}$? I am confused with this concept. ...
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Does impact ionization coefficient increase or decrease with temperature and how does that affect the blocking voltage of a thyristor?
B Jayant Baliga's "Fundamentals of Power Semiconductor Devices" discusses the impact ionization coefficient, which is how many electron/hole pairs are created by a charge carrier colliding ...
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Absolute negative resistance devices
The band diagram of a p-n junction before the p-n reaches equillibrium is this:
The fermi level depends on the chemistry of each crystal lattice(which atoms are used for both the substrate and the ...
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Does any well paper or book about Crystal-field splitting and group theory?
I am currently studying II–VI compound semiconductors based quantum well which the well layer doped with transition metals, focusing on the fine structure, the spin states of transition-metal ions, ...