Ink including light-emitting elements, display device and method of fabricating the same

A display device comprising:

• a substrate;
• a first electrode and a second electrode that extend in a direction on the substrate and are spaced apart from each other;
• a first passivation layer disposed on the substrate and overlapping the first electrode and the second electrode;
• at least one light-emitting element comprising a first semiconductor layer, an emissive layer, and a second semiconductor layer sequentially stacked on each other and an insulating film covering a periphery of at least the emissive layer, the at least one light-emitting element having ends disposed on the first electrode and the second electrode, respectively, the first passivation layer being between the at least one of the light-emitting elements and the first and second electrodes;
• a first organic insulating layer disposed between the first passivation layer and the at least one light-emitting element and in contact with the at least one light-emitting element;
• and
• a second organic insulating layer disposed on the at least one light-emitting element and in contact with the at least one light-emitting element,
• wherein a planar size of the first organic insulating layer is larger than a planar size of the at least one light-emitting element.

A method of fabricating a display device, the method comprising:

• preparing an ink including a solvent, light-emitting elements, and polymer resins;
• forming a first electrode and a second electrode on a substrate;
• forming a passivation layer on the first electrode and the second electrode;
• ejecting the ink onto the substrate;
• applying an electric field over the substrate to align the light-emitting elements on the first electrode and the second electrode;
• removing the solvent;
• forming a first organic layer surrounding the light-emitting elements;
• forming a second organic layer on the first organic layer;
• forming a mask pattern on the second organic layer;
• and
• etching the first organic layer and the second organic layer, wherein
• the polymer resins are included in the ink in an amount of about 1 to about 10 parts by weight based on 100 parts by weight of the ink, and
• the light-emitting elements are included in the ink in an amount of about 0.01 to about 1 parts by weight based on 100 parts by weight of the ink.