Answer to Question #294590 in Electrical Engineering for Reza

Question

At what temperature the saturation current will be the twice of the diode current when the contact potential of the diode is x V. Assuming the diode is made by silicon material.

Answer 1

Diode current

Also can be written as

where:

I = the net current flowing through the diode;

I₀ = Saturation current

V = applied voltage across the terminals of the diode= x volt (Given in question )

q = absolute value of electron charge;

k = Boltzmann's constant; and

T = absolute temperature (K).

• I₀ increases as T increases; and
• I₀ decreases as material quality increases.

as question says

I=2I(e ^qV/kT)

0.5= (e ^qV/kT)

T= - 1.45 (qx/k)

For constant q

T= - 1.45 *xK₁

K₁= a constant (q/k)