Patent ID: 6225647
Filing Date: 2001-05-01
Classification: H01L

Abstract:
A heterojunction light-emitting diode device, comprising:a bulk semiconductor wafer of a first conductivity having a porous semiconductor layer on an exposed surface of said substrate wafer, said porous semiconductor layer comprised of a plurality of pores within a plurality of nanocrystallites, wherein each of said pores is defined by a pore wall and each of said nanocrystallites has a given thickness;at least one monolayer layer of passivating material on said pore wall of each of said pores, to passivate said porous semiconductor layer, wherein said passivated porous semiconductor layer exhibits a quantum efficiency of approximately 5 percent;a transparent layer of semiconductor material disposed on selected areas of said passivated porous semiconductor layer, said transparent layer having a second conductivity, opposite to said first conductivity; andan electrical contact layer disposed on a selected area of said transparent layer.