Patent ID: 9136427
Filing Date: 2015-09-15
Classification: H01L

Abstract:
1. A light emitting diode, comprising: an n-type contact layer doped with silicon; a p-type contact layer; an active region disposed between the n-type contact layer and the p-type contact layer, the active region comprising a barrier layer and a well layer; a superlattice layer disposed between the n-type contact layer and the active region, the superlattice layer comprising a plurality of layers; an undoped intermediate layer disposed between the superlattice layer and the n-type contact layer; and an electron reinforcing layer disposed between the undoped intermediate layer and the superlattice layer, wherein: only a final layer of the superlattice layer closest to the active region is doped with silicon, and the silicon doping concentration of the final layer is higher than that of the n-type contact layer; and the superlattice layer comprises a (Al, In, Ga) N-based group III-nitride semiconductor layer having a smaller bandgap than that of the barrier layer and a larger bandgap than that of the well layer.