Semiconductors are the foundation of every electronic device on Earth. By controlling how electrons move through crystalline materials like silicon and gallium arsenide, engineers have built transistors, solar cells, LEDs, and lasers — devices that collectively define the modern world. The physics rests on quantum mechanics: energy bands, forbidden gaps, and the delicate dance of electrons and holes.
These simulations let you explore semiconductor behavior by tuning doping concentrations, applied voltages, temperature, and material properties. Watch PN junctions form depletion regions, see MOSFETs switch between on and off states, and trace how photons become electrons in solar cells or electrons become photons in LEDs.