another name for diode is "pn" junction.
current depends exponentially on voltage: diode equation (approx.) Idiode=k (exp (Vdiode/Vth)-1) k=constant (saturation current, something like a femto ampère) Vth=KT/q => 25.8 mV @ T=300 K, Vth is thermal voltage K=Boltzmann's constant T=junction temperature (Kelvin) q=electron charge
dormant semiconductor
I cannot think of any, but a pn junction is a part of a diode and has a rectifying properties.
There are 2 type of biasing in PN junction didoe Forward biasing Reverse biasing
diode is unipolar
another name for diode is "pn" junction.
zener diode
The use of the pn diode is for rectification. It can also be used as a switch.
no....is n't
Zener diode is heavily doped pn junction diode.
current depends exponentially on voltage: diode equation (approx.) Idiode=k (exp (Vdiode/Vth)-1) k=constant (saturation current, something like a femto ampère) Vth=KT/q => 25.8 mV @ T=300 K, Vth is thermal voltage K=Boltzmann's constant T=junction temperature (Kelvin) q=electron charge
The difference between the pn-junction diode and the zener diode is that the pn-junction diode is used for rectification while the zener diode is used for rectification and stabilization. Also, the zener diode can function in the breakdown region while the pn-juntion diode can not function in that regime.
what is the difference between reverse characteristics of zener diode and a practical diode ?
because that the tunnel diode is a standard pn junction diode in many respect except its highly doped pn junction so it has some characteristics in the negative resistance region another that its a standard diode
We use pn junction diode in rfctification as a rectifier becase it allows current to flow in one direction only, i.e. in forward biase only , and stop current to flow in reverse baised. thats why we use pn junction diode in rectification.
semiconductor diode with out a pn junction.