LED is short for light-emitting diodes. It is a gallium (Ga) and arsenic (AS), phosphorus (P) of the complex made of the diode. The diode radiate visible light when electrons and holes compound. Then it can be used to make LED. And equipment in the circuit as a indicator light,or a text or figures. LED is a semiconductor diode that it can put energy into light energy. In addition, under certain conditions, it also has light-emitting properties. In the forward voltage, electron injection from the P N Zone area, hole injection from the P area N area. Into other areas of the minority carriers (minority carriers) part of the carrier with the majority (more children) composite and light, suppose P area in the light occurs, then the injected electrons and valence band holes recombine directly to light, or luminescence center was first captured, and then with the hole recombination. In different semiconductor materials, electron and hole energy states are different. Released energy is present difference When the electron and hole recombination. The more energy released issued by the shorter wavelength of the light. Commonly used is of red, green or yellow light of the diode.
Post time: Mar-24-2016