Method for manufacturing light emitting elements and display device including light emitting elements

A method of manufacturing a light emitting element, the method comprising:

• providing a semiconductor structure disposed on a substrate and including a first conductive semiconductor layer, an active material layer, and a second conductive semiconductor layer;
• forming an etching mask layer on the semiconductor structure and one or more etching pattern layers of different diameters and spaced apart from each other on the etching mask layer;
• etching the semiconductor structure in a direction perpendicular to the substrate along a region where nanopatterns are spaced apart from each other to form element rods;
• and
• separating the element rods from the substrate to form light emitting elements, wherein
• the light emitting elements include:
• a first light emitting element having a diameter equal to the diameter of the first nanopattern;
• a second light emitting element having a diameter equal to the diameter of the second nanopattern;
• and
• a third light emitting element having a diameter equal to the diameter of the third nanopattern.

A display device, comprising:

• at least one first electrode and at least one second electrode disposed on a substrate, the at least one first electrode and the at least one second electrode extending in a first direction and spaced apart from each other in a second direction different from the first direction;
• at least one light emitting element disposed in a space between the at least one first electrode and the at least one second electrode;
• a first contact electrode partially overlapping the at least one first electrode and electrically contacting a first end of the at least one light emitting element;
• and
• a second contact electrode partially overlapping the at least one second electrode and electrically contacting a second end of the at least one light emitting element, the second end of the at least one light emitting element being opposite to the first end of the at least one light emitting element, wherein
• the at least one light emitting element includes a first light emitting element and a second light emitting element having a larger diameter than a diameter of the first light emitting element, and
• the first light emitting element and the second light emitting element emit light of substantially same wavelength band.