Light-emitting element and display device
AssigneeSharp Kabushiki Kaisha
InventorRyo Kitamura
Life of this patent
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Abstract
A light-emitting element according to an aspect of the disclosure, comprising: a first electrode; a second electrode; a light-emitting layer disposed between the first electrode and the second electrode; and a charge transport layer disposed between the first electrode and the light-emitting layer. The charge transport layer includes a first layer and a second layer closer to the first electrode relative to the first laver. The first layer and the second layer include nanoparticles containing an identical semiconductor A particle size of the nanoparticle of the second layer is larger than a particle size of the nanoparticle of the first layer.
Claims4
A display device, comprising:
- a first light-emitting element configured to emit red light;
- a second light-emitting element configured to emit green light;
- and
- a third light-emitting element configured to emit blue light,
- wherein each of the first, second, and third light-emitting elements includes:
- an anode,
- a cathode,
- a light-emitting layer disposed between the anode and the cathode, and
- an electron transport layer disposed between the cathode and the light-emitting layer, and including a first layer and a second layer closer to the cathode relative to the first layer,
- in each of the first, second, and third light-emitting elements, the first layer and the second layer include nanoparticles containing an identical semiconductor, and a particle size of each nanoparticle of the second layer is larger than a particle size of each nanoparticle of the first layer, and
- the particle size of each nanoparticle included in the first layer of the first light-emitting element is larger than the particle size of each nanoparticle included in the first layer of the second light-emitting element, and the particle size of each nanoparticle included in the first layer of the second light-emitting element is larger than the particle size of each nanoparticle included in the first layer of the third light-emitting element.
Dependencies are inferred from the claim text.