How do you calculate carrier concentration in a doped semiconductor?

AI Thread Summary
To calculate carrier concentration in a doped semiconductor, the discussion centers on a silicon sample doped with 10^14 boron atoms per cm3. The user initially considers a formula for carrier concentration but questions its validity in relation to the doping concentration. They clarify that boron acts as an acceptor, leading to the relationship n + Nd = p + Na, where n is the electron concentration, Nd is the donor concentration, and Na is the acceptor concentration. The user seeks to determine the value of Nd and how it relates to the overall carrier concentration at 300K. Understanding these relationships is crucial for accurately calculating carrier concentrations in doped semiconductors.
becon
Messages
3
Reaction score
0
I have a homework on Solid state device
the question is :"If a Si sample is doped with 10^14 boron atoms per cm3 then determine the
carrier concentration in the Si sample at 300K."[/b]

I thought that the concentration is calculate by
n = 2[(2pi*un*kT/h^2)]^(3/2)
is this right formula ? How about the Nd = 10^14 ?

thank you.
 
Physics news on Phys.org
I thought it wrong.
I have tried and solve it like : Boron is acceptor then Na = 10^14
by the charge neutrality relationship, n + Nd = p + Na
this is doped semiconductor, then n = Nd - Na and p = ni^2 / n
but what is the value of Nd ?
 
Thread 'Voltmeter readings for this circuit with switches'

Thread 'Voltmeter readings for this circuit with switches'

TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
View full post »
Thread 'Struggling to make relation between elastic force and height'

Thread 'Struggling to make relation between elastic force and height'

Hello guys this is what I tried so far. I used the UTS to calculate the force it needs when the rope tears. My idea was to make a relationship/ function that would give me the force depending on height. Yeah i couldnt find a way to solve it. I also thought about how I could use hooks law (how it was given to me in my script) with the thought of instead of having two part of a rope id have one singular rope from the middle to the top where I could find the difference in height. But the...
View full post »

Similar threads

Semiconductor doping - doping concentration is 0?
Replies
5
Views
2K
Electron and hole concentration
Replies
1
Views
2K
How Do You Calculate Carrier Concentration in Doped Silicon?
Replies
11
Views
5K
What is the electron concentration in a p-doped semiconductor?
Replies
2
Views
3K
Semiconductors - Carrier Recombination
Replies
1
Views
2K
Determining the maximum number of minority electrons in semiconductor
Replies
3
Views
2K
Calc Electron/Hole Concentrations & Ef-Efi for Si Doping in GaAs
Replies
7
Views
2K
Calculating Carrier Concentration in Semiconductors Using the Hall Effect
Replies
5
Views
2K
A Carrier concentration temperature dependence; semiconductors
Replies
1
Views
12K
I Carrier Concentration in a Semiconductor
Replies
1
Views
2K

Hot Threads

Recent Insights

Back
Top