P-n junction diodes (Both bias)

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PnJunction-Diode-ReverseBias.PNG

Given this picture, the circuit is put in reverse bias. Therefore the electrons are flowing INTO the p-type junction.

- As electrons flow into the p-type material the depletion zone is raised as the p-side is made more negative. A picture from hyperphyics.phy-astr.gsu.edu illustrates this

bias5.gif

How does this inhibit current from flowing into the n-junction? Electron current-wise


Conversely the notion of a forward bias diode also confuses me,

- Electrons flow into the n-type , however there still exists that barrier potential from the equilibrium of a p-n junction. How do the electrons 'push through' the barriers to conduct electricity?

Is it because the initial energy from the power source is much greater than the potential barrier?

Thanks,
Kev
 
Last edited:

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