Patent ID: 9595649
Date: 2017-03-14
CPC Classifications: B82Y,F21S,F21Y,H01L,Y10S

Claim:
1. A nanostructured LED comprising: a plurality of nanowires protruding from a substrate through openings in a mask layer, each nanowire comprising a pn- or p-i-n-junction that is formed between an n-doped core that comprises an n-doped III-V semiconductor material and protrudes upward vertically from a top surface of the substrate and a p-doped shell that laterally surrounds the n-doped core and overlies a top portion of the n-doped core and a respective proximal portion of the mask layer around a respective opening therein so that the pn or p-i-n junction includes a vertically extending portion that laterally surrounds the n-doped core and extends perpendicular to the top surface of the substrate, wherein a first group of multiple nanowires within the plurality of nanowires is covered with a laterally-extending portion of a continuous portion of a light-reflecting or transparent contact layer located within a respective area, wherein the continuous portion of the light-reflecting or transparent contact layer further includes vertical portions that extend downward from the laterally-extending portion between vertically extending portions of pn or p-i-n junctions of the first group of multiple nanowires and electrically contact outer sidewalls of p-doped shells of the first group of multiple nanowires, wherein a conductive material continuously extends along an interface between the light-emitting or transparent contact layer underneath the laterally-extending portion of the continuous portion of the light-reflecting or transparent contact layer, along and in contact with the sidewalls of the p-doped shells of the nanowires, and directly on the top surface of the mask layer, and wherein a second group of at least one nanowire within the plurality of nanowires is located outside of the at least one area of, and is not contacted by, any material of the light-reflecting or transparent contact layer and is electrically dead; and a first group of at least one contact pad that is in electrical contact with a bottom portion of each of the plurality of nanowires, wherein the light-reflecting or transparent contact layer is in electrical contact with the pn- or p-i-n-junctions.