A light emitting device comprises: a substrate; a first electrode on the substrate, the first electrode having holes, and having inclined surfaces along the peripheries of the holes; second electrodes on the substrate, each of which is in a respective one of the holes of the first electrode; and light emitting elements between the first electrode and the second electrodes, the light-emitting elements being electrically connected to the first electrode and the second electrodes.

A light-emitting element ink, a display device, and a method of fabricating the display device are provided. The light-emitting element ink includes a light-emitting element solvent, light-emitting elements dispersed in the light-emitting element solvent, each of the light-emitting elements including a plurality of semiconductor layers and an insulating film that surrounds parts of outer surfaces of the semiconductor layers, and a surfactant dispersed in the light-emitting element solvent, the surfactant including a fluorine-based and/or a silicon-based surfactant.

A chamber and surrounding system for the assembly of high yielding, high density, accurately and deterministically placed discrete nano or microparticles or particle arrays are provided, where the positioning of the particles is maintained during a supercritical drying process. The nanoparticle assembly chamber is based upon the dielectrophoretic force generated AC electrodes patterned on a substrate and contacted with electrical feedthroughs, a secondary electrophoretic force generated by a DC electrode opposite the substrate to force particles from the bulk solution near the substrate surface to increase deposition rate, and a fluidic pump to flow solution containing nanoparticles over the substrate surface. The magnitude of the dielectrophoretic forces and electrophoretic force can be adjusted by the geometric parameters, the bias potential applied to the DC bias electrode, and the magnitude of the AC electric field applied to the substrate electrodes.

A light emitting device includes: a substrate; a first electrode and a second electrode provided at a distance from each other on the substrate and extending in one direction; a plurality of light emitting diodes provided between the first electrode and the second electrode, and connected to the first electrode and the second electrode; and a residual pattern provided between at least one of the plurality of light emitting diodes and the substrate.