The present disclosure relates to a light emitting device, a method of manufacturing the same, a light emitting device package, and a lighting system.
A Light Emitting Diode (LED) is manufactured by combining a p-n junction diode, which is characterized in converting electric energy into light energy, with Group III and V elements in the periodic table of the chemical elements. The LED may produce various colors by adjusting a composition ratio of a compound semiconductor and materials.
The LED may generate light energy corresponding to an energy gap between a conduction band and a valance band by combining electrons in an n-layer and electron-holes in a p-layer when forward voltage is applied.
Especially, a blue LED, a green LED, and an Ultra Violet (UV) LED using a nitride semiconductor are commercialized and are extensively used.