Patent ID: 8120010

Claim:
A quantum dot electroluminescent device comprising: a substrate; a quantum dot light-emitting layer disposed on the substrate; a first electrode which injects charge carriers into the quantum dot light-emitting layer; a second electrode which injects charge carriers, which have an opposite charge than the charge carriers injected by the first electrode, into the quantum dot light-emitting layer; a hole transport layer disposed between the first electrode and the quantum dot light-emitting layer; and an electron transport layer disposed between the second electrode and the quantum dot light-emitting layer; wherein the quantum dot light-emitting layer has a first surface in contact with the hole transport layer and a second surface in contact with the electron transport layer, wherein the quantum dot light-emitting layer comprises: a plurality of first organic ligands distributed on the first surface and the second surface; and a plurality of second organic ligands distributed on the first surface and the second surface; and wherein a distribution of the first and second organic ligands on the first surface is different from a distribution of the first and second organic ligands on the second surface.