PN Junction

Edit the MicroSim

MicroSim Name: P-N Junction Voltage Controller

Description:

Using the p5.js JavaScript library, create a real-time visualization of carrier movement, depletion region width, and electric field distribution in a p-n junction. Shows electron and hole trajectories as bias voltage changes from reverse to forward conditions. Show a cross section of the semiconductor with one wire on the top and the other wire on the bottom. Create a slider to allow the user to change the voltage.

MicroSim title: P-N Junction Voltage Controller

Draw the P and N regions in different colors. Draw animations of elections with a small red circles with a negative sign on them.

User Input Slider:

Applied voltage (-5V to +2V) in increments of 1/10 of a volt.

Impact of Input Parameter Changes:

Forward bias: Depletion width decreases, carriers cross junction, exponential current increase Reverse bias: Depletion width increases, carrier blocking, minimal leakage current

Future Parameters

Doping concentrations on both sides Junction area Temperature Light illumination (for photodiode mode)

Higher doping: Narrower depletion region, steeper electric field Temperature increase: Higher leakage current, forward voltage decrease Light illumination: Photocurrent generation in depletion region