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Engineering Physics by S. Mani Naidu

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8.14 Diode equation

The general characteristics of a p-n diode can be represented by an equation called Shockley’s equation for the forward and reverse bias regions:

        images

where

     I = Diode current

     Is = Reverse saturation current

     VD = Forward biased voltage across the diode

     η = Identity factor, this depends on the construction and operating conditions

        = 1 to 2, usually taken as 1

     Vt = Thermal voltage = images

     kB = Boltzmann’s constant = 1.38 × 10 –23 J/K

     T = Absolute temperature in Kelvin

     q = magnitude of ...

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