Patent ID: 7345323

Claim:
A light-emitting diode comprising: a substrate; an n-type layer of GaN formed over the substrate; an active region, formed over the n-type layer; a p-type Al x Ga (1−x) N (0≦×≦1) layer, formed over the active region; a p-type transition layer, formed over the p-type Al x Ga (1−x) N layer, the p-type transition layer comprising a superlattice, the superlattice further comprising: a first sublayer of doped p-type material; a second sublayer of material, wherein a concentration of dopant in the second sublayer is less than a concentration of dopant in the first sublayer; and a metal n-type contact and a metal p-type contact, the n-type contact being connected to the n-type layer, the p-type contact being directly connected to the p-type transition layer superlattice.