THe semiconductor diode is formed by simply bringing n and p type materials together (cnstracted from same base Ge or Si).
Also called as pn junction diode or crystal diode
Diffusion
Diffusion current
Depletion region/ deplition layer/ space charge region
Drift current
Under steady state, diffusion current = Drift current.
Nett current = 0 for open circuit p-n junction diode.
Biasing of Diode
No Bias
Forword Bias Condision
p side to +V, N side to ground.current flowes through the junction
Reversed Bias Condition
no current flowes through the junctin.
Types of diode
Zener Diodes
Light Emitting Diode (LED)
Photo Diode
Schottky Diode
Varactor Diode
Tunnel Diode