What Materials Make Up An Led

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What materials make up an led.

The substrates are chosen to have a close lattice match to the active layers. In 1993 shuji nakamura at nichia created the first high brightness blue led making it possible to rgb mix to any color. The material used most often in leds is gallium arsenide though there are many variations on this basic compound such as aluminum gallium arsenide or aluminum gallium indium phosphide. The active films of the led structure are normally grown epitaxially often by liquid phase or vapour phase epitaxy.

Each diode is created from semiconductor material. This was followed in 1996 by the development of phosphor white leds which combined a blue or ultraviolet led with a phosphor coating that produced white light. One of the layers of semiconductor material will have an excess of electrons one layer will be depleted of electrons. It consists of a pn junction diode and when voltage is applied to the led electrons and holes recombine in the pn junction and release energy in the form of light photons.

Common substrates are gaas gap inp. This is a list of my favorite led diffusion ideas which i hope will provide you with some sparks of inspiration for creating your own next level illumination. Therefore led lights are made up of small diodes. Basics of led light emitting diode as mentioned in the introduction an led is a semiconductor light source.

Leds are comprised of compound semiconductor materials which are made up of elements from group iii and group v of the periodic table these are known as iii v materials. In the early 80 s i learned a lot about digital electronics ac power switching and building neat lighting controllers with ac dimming sound activation multiple chase patterns and x y and x y z axis control of the chase and my panel displays and the light source i used when breadboarding my ideas was the light emitting diode but at the finished end they only provided display for the dj so as. Examples of iii v materials commonly used to make leds are gallium arsenide gaas and gallium phosphide gap. Surface emitting led structure.

The different semiconductor materials called substrates and different impurities result in different colors of light from the led. Leds are made of soda lime glass similar to that used throughout the glass industry for bottles and other common products. This form of led structure emits light perpendicular to the plane of the pn junction. Phosphor based leds are the most popular for manufacturing high intensity.

These compounds are members of the so called iii v group of semiconductors that is compounds made of elements listed in columns iii and v of the periodic table. Led stands for light emitting diode.