Light-emitting element, light-emitting device, and manufacturing method of light-emitting element for improving electron transport efficiency
AssigneeSharp Kabushiki Kaisha
InventorsTadashi Kobashi, Masaki Yamamoto
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Abstract
A light-emitting element includes, in sequence, an anode, a hole transport layer, a luminous layer containing a plurality of quantum dots, an electron transport layer, and a cathode. The electron transport layer includes a plurality of inorganic nanoparticles having electron transportability, and an organic layer having electron transportability. The organic layer partly contains the plurality of inorganic nanoparticles, and includes a plurality of first hollows in an interface adjacent to the luminous layer. The plurality of first hollows are filled with the plurality of quantum dots.
Claims2
A light-emitting element comprising in sequence:
- an anode;
- a hole transport layer;
- a luminous layer comprising a plurality of quantum dots;
- an electron transport layer;
- and
- a cathode,
- wherein the electron transport layer includes
- a plurality of inorganic nanoparticles having electron transportability, and
- an organic layer having electron transportability,
- the organic layer partly includes the plurality of inorganic nanoparticles,
- the organic layer further includes a plurality of first hollows in an interface adjacent to the luminous layer, the plurality of first hollows being filled with the plurality of quantum dots, and
- a difference between an energy level at a conduction-band lower end of an electron transport material included in the organic layer and an energy level at a conduction-band lower end of a core of each of the plurality of quantum dots is equal to or smaller than 1 eV.
A light-emitting element comprising in sequence:
- an anode;
- a hole transport layer;
- a luminous layer comprising a plurality of quantum dots;
- an electron transport layer;
- and
- a cathode,
- wherein the electron transport layer includes
- a plurality of inorganic nanoparticles having electron transportability, and
- an organic layer having electron transportability,
- the organic layer partly includes the plurality of inorganic nanoparticles,
- the organic layer further includes a plurality of first hollows in an interface adjacent to the luminous layer, the plurality of first hollows being filled with the plurality of quantum dots, and
- the organic layer is made of an electron transport material comprising at least one compound selected from the group consisting of 1,3,5-tris (1-phenyl-1H-benzimidazol-2-yl) benzene, 3-(biphenyl-4-yl)-5-(4-tert-butylphenyl)-4-phenyl-4H-1,2,4-triazole, bathophenanthroline, and tris (2,4,6-trimethyl-3-(pyridin-3-yl) phenyl) borane.
Dependencies are inferred from the claim text.