What materials are light emitting diodes made of

1, semiconductor materials: the core part of the LED is made of semiconductor materials. Commonly used semiconductor materials are silicon (Si) and gallium arsenide (GaAs) and so on. These materials have a special electronic structure, able to produce light when the current passes through. In particular, LEDs typically use a combination of P-type semiconductors and N-type semiconductors to form a PN junction, and when current passes through the PN junction, the electrons and holes compound to release energy, which manifests itself in the form of light.

2, encapsulation materials: In order to protect the LED chip and enhance the light output, the chip usually needs to be encapsulated in a transparent material. Encapsulation materials are usually glass or transparent plastic, they can not only protect the chip from environmental factors, but also improve the efficiency of light propagation.

3, auxiliary materials: in the manufacturing process, but also need to use some auxiliary materials, such as conductive leads, electrode materials. These materials are used to connect the LED chip and external circuits to ensure that the current can pass smoothly through the LED, so that it works properly.