Patent ID: 9660126
Date: 2017-05-23
CPC Classifications: H01L,Y02E,Y02P

Claim:
1. A solar cell, comprising: a layer of a p-type Group III-nitride alloy for absorbing a portion of the solar spectrum upon exposure to light to generate photoexcited electron-hole pairs, wherein the p-type Group III-nitride alloy includes a top surface and a bottom surface, wherein the p-type Group III-nitride alloy includes a conduction band having a conduction band edge and a valence band having a valence band edge having a band gap there between the conduction band edge and the valence band edge; a plurality of structural imperfections within the p-type Group III-nitride alloy, each of the structural imperfections having a surface that extends over a full distance from a point on the top surface to a point on the bottom surface of the p-type Group III-nitride alloy, wherein a Fermi level stabilization energy, E wherein the p-type Group III-nitride alloy is compositionally graded along the plurality of structural imperfections between at least a first area and a second area of the p-type Group III-nitride alloy such that the first area possesses a first composition of the p-type Group III-nitride alloy having its conduction band edge beneath the Fermi level stabilization energy, E a layer of n-type Group III-nitride alloy.