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Results for junction forward bias*
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1 vote
1 answer
97 views

PN Junction under strong forward bias? [closed]

Why does the PN Junction never ceases to exist even under strong forward bias? …
Mahesh Anigol's user avatar
1 vote
2 answers
292 views

P-n junction diode under forward bias configuration

Why there is exponential growth in current with respect to voltage in p-n junction diode under forward bias configuration? …
user117953's user avatar
1 vote
3 answers
6k views

Why diffusion current increases under forward bias in pn junction?

I was reading about diffusion current in pn junction with forward bias. However, I got stuck at understanding how diffusion current increases as bias voltage increases. … I understand how pn junction is created, how energy barrier changes under forward and reverse bias. …
emnha's user avatar
  • 81
4 votes
4 answers
5k views

Why is the law of the p-n junction valid under forward bias?

The problem is: This law is also used in forward bias. The $ V_{built\text{-}in} $ is substituted by the net resultant voltage of the forward bias. … This is wrong, the resultant voltage is NOT countering the diffusion current along the gradient, there is forward current flowing. …
Amerez's user avatar
  • 59
0 votes
1 answer
1k views

Extremely forward biased pn junction

When a pn-junction (e.g. an LED) is forward biased the height of the potential barrier is reduced... ...unless you apply a huge potential $V$, in which case the barrier gets inverted and the band edges …
Rol's user avatar
  • 859
0 votes
0 answers
84 views

When does a pn junction diode start conducting current in forward bias?

From what I have studied so far, under forward bias the pn junction's depletion layer and barrier potential are reduced. … forward bias the barrier is reduced and electrons and holes can start diffusing again? …
Aditya Prakash's user avatar
0 votes
1 answer
330 views

LED forward or reverse bias

Are LEDs connected in forward bias or reverse bias? … Here's the question: Light Emitting Diode is A) A lightly doped p-n junction diode connected in Reverse Bias. B) A lightly doped p-n junction diode connected in Forward Bias. …
kenntnisse's user avatar
1 vote
1 answer
531 views

Carrier concentration on forward biased pn-junction

I understand that when a pn-junction is forward biased minority carriers accumulate and form an exponential charge concentration in relationship to the distance from the junction, as the figure below shows … Why the charge density $p_{n0}$ is not higher near the junction? …
João Pedro's user avatar
0 votes
1 answer
1k views

Minority charge carrier concentration in pn-junction during forward bias

with no biased $$ \frac{p_n}{p_p} = e^{-\frac{qV_bi}{kT}} $$ I can say, $p_n<p_p$. … I can understand that $p_n$ with forward biased > $p_n$ without biased, but could it be larger than $N_A$? is it a correct understanding? or I am missing something here? …
Codelearner777's user avatar
2 votes
1 answer
6k views

Energy-band diagram of forward-biased pn junction

When a p-n junction is forward biased then its energy-band diagram looks like this: What would happen if $V_a>V_{bi}$? …
Tendero's user avatar
  • 1,213
1 vote
0 answers
66 views

Why is diffusion current in a diode inversely proportional to doping concentration in the ca...

When a forward bias is applied, the amount of holes diffusing increases. That is an extra amount of holes $ P_n . e^{V_d/V_t} $ found on the n side of the junction. … $V_d$ = Forward Bias Voltage $V_t$ = Thermal Voltage …
Joel Varghese's user avatar
0 votes
1 answer
56 views

Current Inside the Depletion Region Forward Biased PN Junction

For a forward biased PN junction, we assume the hole and electron currents are constant inside the depletion region when there is no generation or recombination in the depletion region (shown from the …
Abe 's user avatar
  • 73
-2 votes
1 answer
773 views

Does the depletion region sustain after a forward bias greater than knee voltage has been Ap...

The depletion region reduces as the forward bias is increased. Does at any point it reach zero or negligible length? … Knee voltage of a diode is defined as the minimum amount of forward bias required for the diode to show significant conduction. …
Ekdeep Singh Lubana's user avatar
0 votes
1 answer
44 views

How can charge neutrality be maintained for a forward-biased PN junction?

When a PN junction is forward biased, majority electons diffuse into p region and majority holes diffuse into n region, if we impose quasi-neutrality, then we have that in the p and n regiosn the change …
Marcus Hany's user avatar
-1 votes
2 answers
1k views

What happen to the electric field in depletion region of a $p-n$ junction diode in forward b...

Does the electric field strength within the depletion region decrease as a result of a decrease in the depletion width due to forward bias vs no bias condition? … Does this electric field strength whether or not is affected by different bias condition contribute to the change in the barrier potential somehow if all other factor remains the same (i.e.: temperature …
Kevin Ha's user avatar

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