Physics

Shockley Diode Calculator

Find diode current from the Shockley equation.

Saturation current (A)

Voltage (V)

Ideality factor

Temperature (K)

Calculated Output

Diode current (A) 0.012

Formula: I = I_s·(e^(V/(n·V_T)) − 1)

Step-by-Step Breakdown

1. Values used:

2. Saturation current = 0 A

3. Voltage = 0.6 V

4. Ideality factor = 1

5. Temperature = 300 K

7. Diode current = 0.012A

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The math behind it

I = I_s·(e^(V/(n·V_T)) − 1), where V_T = kT/q ≈ 25.85 mV at 300 K.

I_s = 1 pA, V = 0.6 V → about 13 mA.

Why so sensitive to voltage?

The exponential means small voltage changes cause large current swings.