Category: Electronic

How LED Works? (Light Emitting Diode)

As said earlier, LEDs are a family of Diodes made of Semiconductors. The way it works is almost the same as the Diodes that have two poles of Positive (P) and Negative Pole (N). The LED will only emit light when the forward voltage is forwarded from the Anode to the Cathode.

LED consists of a doping semiconductor chip that creates P and N junctions. What is meant by the doping process in a semiconductor is the process of adding impurity to a pure semiconductor to produce the desired electrical characteristics. When the LED is fed by forward voltage or forward bias from Anode (P) to Cathode (K), Excess Electrons on N-Type material will move to the area of excess Hole (hole) which is positively charged (P-Type material). When Electrons meet the Hole it releases photons and emits monochromatic light (one color). If you want to see more led screen …