Light-emitting element, production method therefor, and display device
AssigneeSharp Display Technology Corporation
InventorsTakahiro ADACHI, Yasushi ASAOKA
Life of this patent
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Abstract
The disclosure realizes a technique for increasing a reliability of a light-emitting element while supplying an appropriate amount of current to a light-emitting region for light emission. In the light-emitting element, a first charge transport layer is continuous from a light-emitting region to a second region, and a light-emitting layer is continuous from the light-emitting region to a first region. The light-emitting region and the first region of the first charge transport layer have a higher electrical conductivity than the second region of the first charge transport layer
Claims11
A light-emitting element comprising:
- an electrode;
- a charge transport layer;
- and
- a light-emitting layer,
- the electrode, the charge transport layer, and the light-emitting layer being disposed to overlap in this order in a light-emitting region partitioned by at least a bank,
- wherein the charge transport layer is formed in the light-emitting region, a first region adjacent to an outer side of the light-emitting region, and a second region adjacent to a further outer side of the first region, in a plan view,
- the light-emitting layer is formed in at least the light-emitting region and the first region in a plan view,
- in at least one direction in a plan view, the light-emitting region and the first region of the charge transport layer have a higher electrical conductivity than the second region of the charge transport layer, and
- in the first region, the light-emitting layer has an edge portion having a thickness larger than a thickness in the light-emitting region.
A light-emitting element comprising:
- an electrode;
- a charge transport layer;
- and
- a light-emitting layer,
- the electrode, the charge transport layer, and the light-emitting layer being disposed to overlap in this order in a light-emitting region partitioned by at least a bank,
- wherein the charge transport layer is formed in the light-emitting region, a first region adjacent to an outer side of the light-emitting region, and a second region adjacent to a further outer side of the first region, in a plan view,
- the light-emitting layer is formed in at least the light-emitting region and the first region in a plan view,
- in at least one direction in a plan view, the light-emitting region and the first region of the charge transport layer have a higher electrical conductivity than the second region of the charge transport layer, and
- in a second direction intersecting the at least one direction plan view, the first region of the charge transport layer has the same electrical conductivity as the second region of the charge transport layer, and an edge portion of the light-emitting layer overlaps another light-emitting layer on the bank.
A light-emitting element comprising:
- an electrode;
- a charge transport layer;
- and
- a light-emitting layer,
- the electrode, the charge transport layer, and the light-emitting layer being disposed to overlap in this order in a light-emitting region partitioned by at least a bank,
- wherein the charge transport layer is formed in the light-emitting region, a first region adjacent to an outer side of the light-emitting region, and a second region adjacent to a further outer side of the first region, in a plan view,
- the light-emitting layer is formed in at least the light-emitting region and the first region in a plan view,
- in at least one direction in a plan view, the light-emitting region and the first region of the charge transport layer have a higher electrical conductivity than the second region of the charge transport layer, and
- in a second direction intersecting the at least one directionin the second region of the charge transport layer has a higher electrical conductivity than the first region of the charge transport layer, and an edge portion of the light-emitting layer overlaps another light-emitting layer on the bank.
(canceled)
Dependencies are inferred from the claim text.