The p-junction possesses majority carriers holes (positive charged), while the n-junction possesses majority carriers electrons (negative charged). The semiconductor consists of a p junction, n-junction and a neutral region between them. In terms of electronics, LED is defined as a p-n junction diode with an energy gap in the range required for visible light production. Here, we will discuss the following topics: Here, we will discuss the invention of the LED, colored LED, types of LED, advantages, etc. LEDs are used in different applications, such as decorative lights, remote control circuits, etc. The need for light-emitting materials comes from the need for the wavelength of radiation. The LED concept is based on a semiconductor device where holes and electrons recombine to produce energy in the form of photons. It releases light when current passes through it. LED or Light Emitting Diode is a light source device.
