Q. How does the space charge width change with forward and reverse bias? Also, calculate the...

Q. How does the space charge width change with forward and reverse bias? Also,

calculate the space charge width for a reverse bias of 4V on a silicon pn junction at T = 300K and doping concentrations of Na = 5x1015cm-3 , Nd = 5x 1016 cm-3 .

Solutions

Expert Solution

The depletion region is created due to a balance of diffusion and drift current. Diffusion pressure causes holes to travel from the P-side and electrons to travel to the N-side and combine with one another around the junction. This combination leaves behind positive charge on the N-side and negative charge on the P-side. This charge creates an electric field that opposes the diffusion current with a drift current. The width of the depletion region is determined by whatever amount of charge transfer balances the drift and diffusion pressures.

When a forward bias voltage is applied then the space charge region or depletion region width decreases and become zero when applied voltage is equal to built in space charge region voltage. But what a reversed bias is applied the space charge region width increases.

genius_generous answered 1 year ago

Next > < Previous

Related Solutions

condidering a forward bias n-p junction and reverse bias n-p junction, which one produces a rectifying...

condidering a forward bias n-p junction and reverse bias n-p junction, which one produces a rectifying action? explain how it produces the rectifying action

Illuminate Si PIN Photodiode with a flashlight in reverse, zero and forward bias conditions. State what...

Illuminate Si PIN Photodiode with a flashlight in reverse, zero and forward bias conditions. State what you observed. Compare the amount of change in the current. Which bias condition is best to use Si PIN photodiodes to generate electricity from light (solar cell)?Explain

How does the electric field change if we change the sign of its charge?

A charge Q = 24 nC is fixed in space at co-ordinate (0, 0). Another charge...

A charge Q = 24 nC is fixed in space at co-ordinate (0, 0). Another charge q= 4 nC; of mass 0.07 kg, is placed at (d , 0) then let go where d = 10 nm. We need to find the speed of the charge q. Gravity should be ignored. a) Find the potential energy U1 between the two charges when q is at (10 nm, 0). Number Units b) Find the potential energy U2 between the two charges...

How can bias change results in a study? How can bias influence a person who wants...

How can bias change results in a study? How can bias influence a person who wants to conduct a study? What key things can you look for when conducting a study to eliminate bias?

How can bias change results in a study? How can bias influence a person who wants...

How can bias change results in a study? How can bias influence a person who wants to conduct a study? What key things can you look for when conducting a study to eliminate bias?

Calculate W,Q, Change of U, change of H ,and Change of S for the following two...

Calculate W,Q, Change of U, change of H ,and Change of S for the following two separate processes involved one mole of ideal gas(Cp= 3.5R) with the same initial state at 100kpa and 300k A) the gas expands adiabatically and mechanical reversibly to 20kpa. B) the gas expands to the same final state as process a) but it expands irreversibly with an efficiency of 60% compared with the reversible process a)

What is selection bias in sampling? How can it be controlled? How does selection bias affect...

What is selection bias in sampling? How can it be controlled? How does selection bias affect the potential use of evidence yielded by research that has a sample with selection bias? Please include a reference. Thank you

How do you calculate a change in residual earnings? Also how do you upload a file...

How do you calculate a change in residual earnings? Also how do you upload a file or paste in the question area?

1)If you double the charge, how does the energy change in a capacitor? 2)How do you...

1)If you double the charge, how does the energy change in a capacitor? 2)How do you calculate the equivalent capacitance of capacitors when they are in series and in parallel? 3)What is a dielectric and dielectric breakdown? 4)What’s leakage current? 5)Define dielectric constant and permittivity.

Subjects