Light emitting element, display device and method for manufacturing the same

A display device comprising:

• a substrate;
• a common electrode on the substrate;
• an organic pattern layer on the common electrode;
• a light emitting element on the organic pattern layer and having a first contact electrode and a second contact electrode;
• a pixel electrode on the first contact electrode;
• and
• a connection electrode connecting the second contact electrode and the common electrode,
• wherein the light emitting element comprises:
• a first portion comprising the first contact electrode, a first semiconductor layer, an active layer, and a second semiconductor layer;
• a second portion comprising the second contact electrode, a second semiconductor layer, and a third semiconductor layer;
• and
• a protective layer on a top portion and a side of the first portion and a top portion and a side of the second portion,
• wherein the first portion is on the second portion, and
• wherein a diameter of the first portion is smaller than a diameter of the second portion.

A method of manufacturing a light emitting element comprising:

• forming a plurality of semiconductor material layers on a base substrate;
• etching the plurality of semiconductor material layers to form a light emitting element comprising a third semiconductor layer, a second semiconductor layer, an active layer, and a first semiconductor layer;
• forming a first portion and a second portion of the light emitting element by etching a portion of the first semiconductor layer, the active layer, and the second semiconductor layer;
• forming a protective layer on a top portion and a side of the first portion and on a top portion and a side of the second portion;
• and
• forming a first contact electrode on a top of the first portion and forming a second contact electrode on a top of the second portion,
• wherein the second portion is on the first portion, and a diameter of the first portion is smaller than a diameter of the second portion.

A method of manufacturing a display device comprising:

• forming a thin film transistor layer and a common electrode on a substrate;
• forming a temporary adhesive layer on the common electrode and aligning light emitting elements;
• fixing a light emitting element from among the light emitting elements on the temporary adhesive layer and removing a portion of the temporary adhesive layer to form an organic pattern layer;
• forming a connection electrode connecting the common electrode and a second contact electrode of the light emitting element;
• forming an organic layer covering a portion of the connection electrode and the light emitting element;
• and
• forming a pixel electrode on a first contact electrode of the light emitting element,
• wherein the light emitting element comprises:
• a first portion comprising the first contact electrode, a first semiconductor layer, an active layer, and a second semiconductor layer arranged in a sequence,
• a second portion comprising the second contact electrode, a second semiconductor layer, and a third semiconductor layer arranged in a sequence,
• wherein the first portion is on the second portion,
• wherein a diameter of the first portion is smaller than a diameter of the second portion.