Tag Archives: LED light emitting diode

LED Light-emitting diodes (LEDs) are optoelectronic components made of III-V compound semiconductors, and their core is a PN junction. Under the forward voltage, electrons are injected into the P region from the N region, holes are injected into the N region from the P region, and part of the minority carriers entering the opposite region recombine with the majority carriers to emit light. The material properties (band gap width) forming the PN junction determine the wavelength of the emitted light, and for visible light, it determines the color of the light.