Light-emitting element, light-emitting device, and display device
AssigneeSharp Kabushiki Kaisha
InventorKenji Kimoto
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Abstract
A light-emitting element includes a first electrode, a second electrode, a light-emitting layer between the first electrode and the second electrode, and an intervening layer between the first electrode and the light-emitting layer, the intervening layer containing an oxide. The first electrode includes: a first layer adjacent to the intervening layer, the first layer containing atoms of a first metal element; and a second layer containing atoms of a second metal element, the first layer and the second layer are stacked in a stated order when viewed from the light-emitting layer, and the second metal element is more susceptible to oxidation than the first metal element.
Claims19
A light-emitting element comprising:
- a first electrode;
- a second electrode;
- a light-emitting layer between the first electrode and the second electrode;
- and
- an intervening layer between the first electrode and the light-emitting layer, the intervening layer containing an oxide, wherein
- the first electrode includes:
- a first layer adjacent to the intervening layer, the first layer containing atoms of a first metal element;
- and
- a second layer containing atoms of a second metal element,
- the first layer and the second layer are stacked in a stated order when viewed from the light-emitting layer, and
- the second metal element is more susceptible to oxidation than the first metal element, wherein
- there is formed a crystal grain boundary in the first layer, and
- the first layer includes a crystal domain that has a dimension of from 50 nm to 800 nm both inclusive in a direction in which the intervening layer and the second layer are connected by a minimum distance.
A light-emitting element comprising:
- a first electrode;
- a second electrode;
- a light-emitting layer between the first electrode and the second electrode;
- and
- an intervening layer between the first electrode and the light-emitting layer, the intervening layer containing an oxide, wherein
- the first electrode is adjacent to the intervening layer,
- the first electrode contains either an alloy of the first metal element and the second metal element or a mixture of the first metal element and the second metal element,
- the second metal element is more susceptible to oxidation than the first metal element,
- the first electrode contains oxygen atoms,
- in the first electrode, a ratio in number of the oxygen atoms to the atoms of the second metal element is less than or equal to 30%, and
- the ratio of the number of the atoms of the second metal element to the number of the atoms of the first metal element in the first electrode is from 0.1% to 30% both inclusive.
Dependencies are inferred from the claim text.