Color and Materials of LED

LED means Light Emitting Diode. LED which is used as a semiconductor and work as alternative source of sunlight. In 1962 LED discover scientist and it’s intensity is very less than update LED.

One can see various types of LED such as

Red Light Emitting Diode, it’s intensity is very small
Blue Light Emitting Diode, it’s intensity is very high
Green Light Emitting Diode, it’s intensity is very high

In physical science two types of LED seen one is p-type LED and one is n-type LED. In a p-n junction when holes and electron meets energy released from electron, because electron contain high energy and hole contain low energy, when energy level change and Photon emit energy , light is created.

Some LED materials examples given bellow:

White: White color LED contain Yellow phosphor, voltage drop amount is 3.5 Volt and wave length is board spectrum.

Pink: Pink color LED contain phosphor which is may be one or two layers and also added various color of phosphor such as orange , yellow, pink and red phosphor. It’s voltage drop amount equal to 3.3 Volt. And wavelength is not fixed.

Green: Green color LED contain Gallium Phosphide, Aluminium Gallium Indium Phosphie and AlGaP. It’s frequency is 500 to 570. Voltage drop amount is less than 2.

Ultraviolet: Ultraviolet Led contain Diamond, AlGaN, BN and AlN. It’s wavelength is less than 400 nanometer. And it’s voltage drop amount is 2.48 to 3.7

Infrared color LED: Infrared color LED which is contain AlGaAs and AsGa metal and it’s voltage drop amount is less than 1.63 and wavelength is less than 760 nanometer.

And also Yellow, Violet, Purple, Orange and Blue color LED is available.

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