Question

# Which compound is used in making LED?

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Solution

## L.E.D:L.E.D stands for the light emitting diode.It emits light when the current flows through a semiconductor.Compounds/Materials in L.E.D:Some metals that are used in L.E.D are arsenic, indium as well as gallium.The compound that is used for making LED is Gallium arsenide phosphide $\left({\mathrm{GaAs}}_{1-\mathrm{x}}{\mathrm{P}}_{\mathrm{x}}\right)$.Gallium arsenide phosphide: It is an alloy of gallium arsenide and gallium phosphide.Gallium arsenide phosphide is used for manufacturing different colored LEDs such as orange, red, or yellow.

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