The working principle of high power LED
The magnitude of the energy difference is different, and the frequency and wavelength of the light are different, and the color of the corresponding light varies.
The positive charge will diffuse to the N region, and the electrons in the N region will also diffuse to the P region, while the accumulation of nonequilibrium charges will be accumulated in the two regions. Due to current injection of minority carriers generated relatively unstable, for PN junction system, injected into the nonequilibrium holes in the valence band to the conduction band and the electron recombination, the excess energy will be in the form of light radiation, electron and hole energy difference is bigger, the photon energy is generated in high.
The basic working principle of LED is an electro-optical conversion process, when a forward bias is applied to both ends of PN junction, due to the reduction of PN junction barrier, P region
Light emitting diode (LED) is a solid device which converts electric energy into light energy. Its structure is mainly composed of PN junction chip, electrode and optical system.
