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Question 1

1vote

1answer

90views

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 ...

S K

115

askedNov 9 at 17:49

Question 2

1vote

0answers

30views

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, ...

Aditya Das Utsha

11

askedNov 5 at 7:03

Question 3

1vote

0answers

148views

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 ...

memeguy

11

askedOct 26 at 19:49

Question 4

0votes

0answers

81views

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. ...

Punardutta Mondal

1

askedOct 25 at 16:35

Question 5

0votes

1answer

93views

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 ...

Snew Tres

3

askedAug 28 at 11:11

Question 6

0votes

1answer

128views

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 ...

Root Groves

257

askedAug 23 at 22:02

Question 7

1vote

0answers

87views

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, ...

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Ray-Yu Hong

Question 8

0votes

0answers

62views

Does any recommended references on Jahn–Teller effect and strain effects in quantum wells or quantum dots?

I would like to ask if anyone could explain or suggest good textbooks or literature regarding the Jahn–Teller effect and strain effects in quantum wells or quantum dots. My current research focuses on ...

Community wiki

4 revs, 2 users 67%
Ray-Yu Hong

Question 9

0votes

3answers

205views

Why does a PN junction block current in reverse bias?

Here's a diagram of a PN junction I made. I understand a PN junction is meant to function like a diode, only allowing current through one direction but I don't understand how it does this. I ...

Snew Tres

3

askedAug 12 at 11:37

Question 10

1vote

0answers

54views

How Can ID Increase Beyond Velocity Saturation in the Presence of Channel Length Modulation?

I have a question which is , in Mosfet when pinch off happens the place which was depleted between drain and pinch off point has huge electric field which makes the carriers has velocity saturation in ...

Abdelrahman

319

askedJul 20 at 9:53

Question 11

0votes

0answers

60views

Can quantum confinement in n-type semiconductor nanocrystals break the classical charge neutrality assumption, and what are the fundamental limits?

In classical n-type semiconductors, we maintain charge neutrality where the number of donor ions $N_d^+$ equals the number of free electrons $n$, expressed as:$$n = N_d^+ = N_d(1 - f_d)$$However, ...

Axel Brooks

9

askedJul 19 at 14:15

Question 12

0votes

0answers

79views

Why is the fermi energy level in between the valence and conduction band and not on top of the valence band? [duplicate]

Why does the fermi energy level exist between the valence and conduction band? What's the difference between the fermi level and the valence bond, should they not be the same since If at T=0K, all ...

Manya Chauhan

1

askedJul 18 at 23:10

Question 13

0votes

0answers

113views

How does the applied magnetic field affect charge carrier concentration and mobility?

I have just done hall measurements with applying different magnetic fields. I am meant to analyse how the magnetic field affects the charge carrier concentration and mobility for Platinum and Gold ...

McQuanta

41

askedJul 14 at 16:06

Question 14

0votes

0answers

66views

If I connect solar cells in series, why doesn't the electron leave the N region of the first solar cell, into the next one, falling into the P region?

N region has an abundance of electrons.P region has an abundance of holes. How come when the electrons leave the N region of the first solar cell, they somehow take that energy and overcome the ...

InexperiencedCoder

59

askedJul 8 at 17:12

Question 15

2votes

1answer

98views

Significance of p-type layer in Avalanche Photo-Diode

I am trying to understand the inner working of avalanche photodiodes.I understand that the electron-hole pairs are accelerated by the negative bias voltage along the depletance region and—according ...

Santiago Sued

45

askedJul 5 at 3:33

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Stack Exchange Network

Questions tagged [semiconductor-physics]

Meaning of band gap structure [closed]

How does surface dipoles cause negative electron affinity in hydrogen terminated diamond?

Semiconductors and holes

Fermi level in n-type semiconductors at $0\,\text{K}$

Does impact ionization coefficient increase or decrease with temperature and how does that affect the blocking voltage of a thyristor?

Absolute negative resistance devices

Does any well paper or book about Crystal-field splitting and group theory?

Does any recommended references on Jahn–Teller effect and strain effects in quantum wells or quantum dots?

Why does a PN junction block current in reverse bias?

How Can ID Increase Beyond Velocity Saturation in the Presence of Channel Length Modulation?

Can quantum confinement in n-type semiconductor nanocrystals break the classical charge neutrality assumption, and what are the fundamental limits?

Why is the fermi energy level in between the valence and conduction band and not on top of the valence band? [duplicate]

How does the applied magnetic field affect charge carrier concentration and mobility?

If I connect solar cells in series, why doesn't the electron leave the N region of the first solar cell, into the next one, falling into the P region?

Significance of p-type layer in Avalanche Photo-Diode

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