Light emitting component having a window layer with lower resistance and better current spreading effect to improve the light emitting efficiency

This invention provides a light emitting component which is structurally formed with a substrate, a lower cladding layer, a lower confinement layer, an active layer, an upper confinement layer, an upper cladding layer, a tunnel junction layer, a window layer and an upper electrode from bottom to top in sequence. According to this invention, the window layer and the upper electrode are converted from a p type of a traditional LED to an n type in this invention by virtue of the tunneling junction layer. Since the resistance of the n-type window layer is much smaller than the resistance of the p-type window layer, the window layer of the light emitting component provided in this invention has low resistance and a better current spreading effect, and then, the light emitting efficiency is increased. The resistance of the n-type upper electrode is much smaller than the resistance of the p-type upper electrode, and therefore, the n-type upper electrode of the light emitting component in this invention is more benef