Photodiode-Simulation

A simple and comprehensive simulation demonstrating the behaviour of a PN photodiode

#Simulations can be run on a local IDE or p5.js online IDE

---

#list of formulas used in simulation

1. Depletion Width W ∝ √(V_bi + V_R) (Simulation uses linear approximation: W ∝ V_R)

2. Electric Field E ≈ V_R / W

3. Drift Velocity v_d = μE

4. Thermal Voltage V_T = kT / q ≈ 0.026 V at 300 K

5. Shockley Diode Equation I_D = I_0 (e^(V / V_T) − 1)

6. Photocurrent I_ph ∝ Light Intensity (Physical form: I_ph = η qP / hν)

7. Total Photodiode Current I(V) = I_0 (e^(V / V_T) − 1) − I_ph

8. Reverse Bias Approximation For V < 0: I ≈ −I_ph − I_0