Patent ID: 7456423

Claim:
A quantum dot optoelectronic device having an Sb-containing overgrown layer, comprising: an epitaxy substrate; an epitaxy buffer layer, said epitaxy buffer layer deposited on said epitaxy substrate; a quantum dot layer, said quantum dot layer deposited on said epitaxy buffer layer; an overgrown layer, said overgrown layer having antimony (Sb), said overgrown layer deposited on said quantum dot layer; and a surface layer, said surface layer deposited on said overgrown layer, wherein the said overgrown layer is made of a compound selected from a group consisting of Al x Ga 1-x (N y P 1-y ) m As z Sb 1-m-z and InAl x Ga 1-x (N y P 1-y ) m As z Sb 1-m-z ; and where the value of x, y, z and m is between 0 and 1.