LEDs, or light-emitting diodes, are semiconductor solid-state light-emitting devices. Specifically, LEDs are made of semiconductor materials, which possess unique electrical and optical properties that enable them to emit light when powered. In LEDs, these semiconductor materials form a PN junction. When a forward voltage is applied across this junction, electrons and holes recombine, releasing energy in the form of photons, generating visible light.
In addition to the semiconductor chip, the core light-emitting material, LED production also involves a variety of auxiliary materials, such as silver or gold wires connecting the chip to the circuit board, epoxy resin to protect the internal core wires, and the housing that mounts and protects the entire LED module. These materials work together to ensure efficient, stable, and reliable operation of LED lights.