Patent ID: 8921141
Filing Date: 2014-12-30
Classification: H01L

Abstract:
1. A semiconductor light emitting device comprising a support and a plurality of nanopyramids arrayed on the support, each of the plurality of the nanopyramids comprising: a first conductivity type semiconductor core or core seed; a first conductivity type semiconductor shell enclosing the core or the core seed of the first conductivity type semiconductor; a first layer of a second conductivity type semiconductor over the shell of the first conductivity type semiconductor, wherein the first conductivity type semiconductor shell and the first layer of second conductivity type semiconductor are configured to form a pn or pin junction that in operation provides an active region for light generation; and a second layer of the second conductivity type semiconductor over the first layer of second conductivity type semiconductor; wherein the device comprises at least one feature which reduces or eliminates leakage current at bases of the nanopyramids, wherein the at least one feature comprises a semiconductor foot portion of at least one of the first conductivity type semiconductor or the first layer of the second conductivity type semiconductor which extends under an electrode contacting the second layer of the second conductivity type semiconductor.