High efficiency electroluminescent devices and methods for producing the same

A substrate comprising a layered structure wherein the layered structure comprises:

• an anode layer;
• an electroluminescent material layer;
• and
• an electron-injection layer, wherein the electron-injection layer comprises a polymer composition that comprises a polymer containing polar component and a metal diketonate.

An electroluminescent device, the device comprising:

• a substrate;
• an anode layer positioned above the substrate;
• an electroluminescent material layer positioned above the anode;
• an electron-injection layer positioned above the electroluminescent layer, wherein the electron-injection layer comprises a polymer composition comprising a polymer that contains a polar component and a metal diketonate;
• and
• a cathode layer positioned above the electron-injection layer.

A method for fabricating an electroluminescent device comprising the steps of:

• providing a substrate;
• contacting the substrate with an anode layer;
• contacting the anode layer with an electroluminescent material layer;
• and
• contacting the electroluminescent material layer with an electron-injection layer, wherein the electron-injection layer comprises polyethylene glycol dimethyl ether and barium acetylacetonate, and wherein the contacting is performed in such a manner that the electroluminescent material layer is in electrical contact with both the anode and electron-injection layers.

A method for fabricating an electroluminescent device comprising the steps of:

• providing a substrate;
• contacting the substrate with an anode layer;
• contacting the anode layer with a dielectric layer;
• forming a cavity in the dielectric layer and the anode layer in such a manner that the cavity extends through the dielectric layer and the anode layer, wherein once formed the cavity has an interior cavity surface comprising a dielectric region and an anode region;
• coating the interior cavity surface with an electroluminescent material such that the electroluminescent material is in electrical contact with the anode region and dielectric region of the interior cavity surface so as to form a layered structure;
• and
• contacting the layered structure with an electron-injection layer, wherein the electron-injection layer comprises polyethylene glycol dimethyl ether and barium acetylacetonate in such a manner that the electron-injection layer is in electrical contact with the electroluminescent material in the cavity.