Patent ID: 8890113

Claim:
A semiconductor optoelectronic device comprising (i) an active region capable of generating light through radiative recombination of nonequilibrium carriers; (ii) a means for the injection of nonequilibrium carriers into said active region; wherein said semiconductor optoelectronic device is epitaxially grown on a substrate; wherein at least one layer of said semiconductor optoelectronic device is formed of a III-V semiconductor material; wherein said active region further comprises at least one insertion; wherein said at least one insertion contains phosphorus atoms in the anion sublattice and gallium atoms in the cation sublattice; wherein said at least one insertion is tensile strained with respect to said substrate; wherein said insertion creates a barrier for nonequilibrium electrons, wherein the barrier for nonequilibrium electrons prevents their leakage away from said active region, and wherein the barrier is a current blocking layer for electrons, and wherein the barrier for nonequilibrium electrons exceeds the maximum barrier height possible in the gallium-aluminum arsenide materials system.