Quantum Dot Solar Cell — Multiple Exciton Generation

This simulator visualizes multiple exciton generation (MEG), the mechanism that lets some quantum-dot solar cells convert a single high-energy photon into more than one collected electron. A lattice of quantum dots renders in 3D with a size-dependent confinement bandgap computed from a simplified Brus effective-mass model; incoming photons of a chosen energy strike random dots, and whenever the photon carries enough excess energy above the MEG threshold, extra electron-hole pairs spawn and drift to the collecting contacts instead of just one. Live readouts track the confinement bandgap, the excess photon energy, a running quantum-yield average, and a histogram of how many excitons each absorbed photon actually produced — all driven by adjustable dot radius, photon energy, and MEG threshold controls.