Patent ID: 8723158
Filing Date: 2014-05-13
Classification: H01L

Abstract:
1. A light emitting diode comprising: a light emitting structure comprising a first conductive type semiconductor layer doped with a first conductive type dopant, an active layer, and a second conductive type semiconductor layer doped with a second conductive type dopant, wherein the first conductive type semiconductor layer, the active layer and the second conductive type semiconductor layer are disposed adjacent to each other, and the active layer comprises a well layer and a barrier layer which are alternatively stacked at least one time, and an energy band gap of the well layer is smaller than an energy band gap of the barrier layer; a multi-contact layer directly disposed on at least a predetermined region of the second conductive type semiconductor layer, the multi-contact layer comprising at least one pair-structure configured of a first layer comprising InGaN having a first dopant doped thereon and a second layer comprising GaN having a second dopant doped thereon, wherein each of the first dopant and the second dopant is a first conductive type dopant; and a first electrode and a second electrode to provide currents to the first conductive type semiconductor layer and the second conductive type semiconductor layer, respectively; wherein the first conductive type semiconductor layer, the active layer, the second conductive type semiconductor layer, the multi-contact layer and the first and second electrodes are disposed, with the same directivity, and the second conductive type semiconductor layer and the multi-contact layer are differently doped and an n-p tunnel junction is formed between the second conductive type semiconductor layer and the multi-contact layer.