Light emitting diode, which is often called and better known by the name LED, is a semiconductor electronic component that emits light or infrared when given a voltage (electricity), as a result of electroluminescence, meaning that the color of the light it produces depends on the material it uses. It is often seen that this LED (light emitting diode) or light emitting diode is used in many electronic devices, for example for an on / off indicator, flashlight, traffic light, perimeter light and others. LEDs are also used as a light source in multimode fiber, optical mice and high-end laser printers.
Meanwhile, LED (light emitting diode) which emits infrared is widely used in optoelectronics, for example in camera auto focus and remote control for television sets, and as a light source in some distance fiber optic communication systems. LEDs are also formed by the so-called III-V semiconductors, which are compounds related to gallium arsenide. This compound consumes little power, is long lasting and is also cheap.
Due to the result of this electroluminescence, where the LED (light emitting diode) can emit light of different colors depending on the material it uses, this LED (light emitting diode) can produce red, yellow, green, blue and white. When using an indium gallium aluminum phosphide compound (AlInGaP), it will produce red and yellow colors. When using the indium gallium nitride (InGaN) compound, this LED will emit green and blue light, and when phosphorus is added, it can emit white light.
The way this LED works is, when an electric current is inserted into the LED, the electrons and holes in the two semiconductor layers are attracted to each other at the junction with different voltages. When they combine, they then create photons.
That's my brief description of the light emitting diode or LED for short. And don't miss to read other reviews about articles related to the world of electronics here. Hopefully it can provide additional knowledge for all of you.