UV light diodes refer to a kind of glow diode (LED) that can emit nearly ultraviolet light. Its luminous principle is the same as ordinary glow diodes.

50 years ago, people had understood the basic knowledge of semiconductor materials to produce light. The first commercial diode was born in 1960. LED is an abbreviation of English Light Emitting Diode.

Its basic structure is a semiconductor material of electrostatic glowing, placed on a leading rack, and then seal with epoxy resin around it to protect the internal core wire.

The core part of the light -emitting diode is a chip composed of a P -type semiconductor and N -type semiconductor. There is a transition layer between the P -type semiconductor and the N -type semiconductor, called the PN knot. In the PN knot of certain semiconductor materials, the small number of loads injected will release excess energy in the form of light when compounding with most carrier, thereby directly converting electrical energy to light energy. Pn knot plus reverse voltage, a few carriers are difficult to inject, so it does not glow.

This diode made of injecting electrophtochemical lighting principle is called luminous diode, which is called LED. When it is in a positive working state (that is, a positive voltage with both ends) and the current flows from LED anode to cathode, semiconductor crystals emit light from different colors from ultraviolet to infrared. The strength of light is related to current.