Light-Emitting Element and Display Device Including the Same

A light-emitting element, comprising:

• a first semiconductor layer including a concave pattern that extends from a lower surface of the first semiconductor layer towards an upper surface of the first semiconductor layer;
• a light-emitting layer on the first semiconductor layer;
• a second semiconductor layer on the light-emitting layer;
• a first electrode in contact with the first semiconductor layer;
• and
• a second electrode in contact with the second semiconductor layer.

A display device, comprising:

• a substrate including a plurality of subpixels;
• a plurality of transistors on the substrate;
• and
• a light-emitting element in each of the plurality of subpixels on the substrate,
• wherein the light-emitting element of at least one of the plurality of subpixels includes a concave pattern that extends from a bottom surface of the light-emitting element towards a top surface of the light-emitting element, the bottom surface closer to the substrate than the top surface.

A display device, comprising:

• a substrate;
• a plurality of assembling electrodes on the substrate, the plurality of assembling electrodes including a plurality of first assembling electrodes and a plurality of second assembling electrodes;
• an insulation layer on the plurality of assembling electrodes;
• a plurality of concave-convex structures on the insulation layer, each of the plurality of concave-convex structures overlapping an area between a first assembling electrode of the plurality of first assembling electrodes and a second assembling electrode of the plurality of second assembling electrodes, the plurality of concave-convex structures including a first concave-convex structure of a first size and a second concave-convex structure of a second size that is different from the first size;
• and
• a plurality of light emitting elements including:
• a first light emitting element that emits light of a first color and having a first concave pattern of a first concave size that extends from a first bottom surface of the first light emitting element towards a first top surface of the first light emitting element, the first bottom surface closer to the substrate than the first top surface;
• and
• a second light emitting element that emits light of a second color and having a second concave pattern of a second concave size that is different from the first concave size, the second concave pattern extending from a second bottom surface of the second light emitting element towards a second top surface of the second light emitting element, the second bottom surface closer to the substrate than the second top surface,
• wherein the first concave-convex structure is in the first concave pattern, and the second concave-convex structure is in the second concave pattern.