Method for surface treatment of light-emitting element, method of manufacturing display device comprising light-emitting element provided using ink, and electronic device comprising display device

An electronic device, comprising:

• a processor;
• a display device outputting image information based on a signal provided from the processor;
• and
• a power module supplying power to the display device,
• wherein the display device is manufactured by a manufacturing method comprising:
• providing an ink comprising a light-emitting element and a solvent on a base layer;
• aligning the light-emitting element between a first electrode and a second electrode formed on the base layer;
• and
• forming a first connection electrode electrically connected to a first end of the light-emitting element and a second connection electrode electrically connected to a second end of the light-emitting element,
• wherein the light-emitting element comprises a semiconductor layer and a cover layer covering at least a portion of the semiconductor layer, and
• wherein the cover layer is surface-treated by a surface-treatment method and comprises a cover base forming a target layer and a self-assembled layer formed on the cover base, and
• wherein the surface-treatment method comprises:
• performing ultraviolet ozone (UVO) treatment on the target layer;
• and
• forming the self-assembled layer on the target layer,
• wherein the performing the UVO treatment comprises irradiating the target layer with UV light for 50 minutes to 70 minutes, and
• wherein the forming the self-assembled layer comprises dipping the target layer into a mixing solution comprising ethanol and a coupling agent at 50° C. to 70° C.