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US 12,772,653 B2Granted
Light-emitting element
AssigneeSharp Kabushiki Kaisha
InventorsMasaya Ueda, Keisuke Kitano, Masaki Yamamoto, Makoto Izumi, Yoshihiro Ueta
Life of this patent
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Abstract
A light-emitting element includes the following: a cathode; an anode; and a light-emitting layer disposed between the cathode and the anode, and containing a quantum dot including a core and a shell, wherein the core contains a dopant.
Claims9
A light-emitting element comprising:
- a cathode;
- an anode;
- and
- a light-emitting layer disposed between the cathode and the anode, and containing a quantum dot that includes a core and a shell,
- wherein:
- the core contains a first donor impurity as a dopant,
- a hole transport layer is provided between the anode and the light-emitting layer,
- a plurality of second doped layers containing a second donor impurity is provided between the hole transport layer and the light-emitting layer, and
- a separation layer containing no dopant and having a band gap larger than a band gap of each of the plurality of second doped layers is provided between the plurality of second doped layers.
6 more elements
A light-emitting element comprising:
- a cathode;
- an anode;
- and
- a light-emitting layer disposed between the cathode and the anode, and containing a quantum dot that includes a core and a shell,
- wherein:
- the core contains a first donor impurity as a dopant,
- a hole transport layer is provided between the anode and the light-emitting layer,
- a plurality of second doped layers containing a second donor impurity is provided between the hole transport layer and the light-emitting layer,
- a concentration of at least one element forming a compound that is contained in the shell has a gradient between a first region of the shell being closest to the core and a second region of the shell being farthest from the core, and
- a separation layer containing no dopant and having a band gap larger than a band gap of each of the plurality of second doped layers is provided between the plurality of second doped layers.
7 more elements
Dependencies are inferred from the claim text.