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US 10,700,236 B2Granted
Quantum dot spacing for high efficiency quantum dot LED displays
AssigneeApple Inc.
InventorsJonathan S. Steckel, Hitoshi Yamamoto, Paul S. Drzaic
Life of this patent
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Abstract
Quantum dot layers and display devices including quantum dot layers are described. In an embodiment the quantum dot layer includes quantum dots with coatings to adjust the spacing between adjacent quantum dots. In an embodiment, the coatings are metal oxide coatings and may create a charge transporting matrix. In an embodiment, the coatings are core-material coatings. The QD layers may be QD-LED compatible.
Claims16
A quantum dot LED display subpixel comprising:
- a bottom electrode layer;
- a hole transport layer over the bottom electrode layer;
- a quantum dot layer over the hole transport layer, wherein the quantum dot layer includes a matrix of quantum dots including a core, a shell around the core, and a core-material coating around the shell, wherein the core-material coating consists of the core material;
- wherein the matrix of quantum dots is a close packed film in which the shells of adjacent quantum dots are spaced apart by an average distance of 0.5 nm 10 nm, and the core-material coatings are in direct contact with one another;
- an electron transport layer over the quantum dot layer;
- and
- a top electrode layer over the electron transport layer.
4 more elements
A quantum dot layer comprising:
- a matrix of quantum dots;
- wherein each quantum dot includes:
- a core that consists of a core material selected from the group consisting of:
- CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, GaAs, GaP, GaAs, GaSb, HgS, HgSe, HgTe, InAs, InP, InSb, AlAs, AlP, AlSb, InGaP, ZnSeTe, ZnCdS, ZnCdSe, and CdSeS,
- a shell around the core, wherein the shell comprises a shell material different from the core material;
- and
- a core-material coating around the shell, wherein the core-material coating consists of the core material;
- and
- wherein the shells of adjacent quantum dots are spaced apart by an average distance of 0.5 nm-3.0 nm.
6 more elements
Dependencies are inferred from the claim text.