Solid state lighting devices comprising quantum dots
AssigneeSamsung Electronics Co., Ltd.
InventorsKwang-Ohk Cheon, Jennifer Gillies, David Socha, David Duncan, Michael Locasio
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Abstract
Solid state lighting devices containing quantum dots dispersed in polymeric or silicone acrylates and deposited over a light source. Solid state lighting devices with different populations of quantum dots either dispersed in matrix materials or not are also provided. Also provided are solid state lighting devices with non-absorbing light scattering dielectric particles dispersed in a matrix material containing quantum dots and deposited over a light source. Methods of manufacturing solid state lighting devices containing quantum dots are also provided.
Claims34
A solid state lighting device comprising:
- a light source;
- and
- an active layer deposited either directly or indirectly on top of the light source, the active layer comprising one or more populations of quantum dots dispersed in a first matrix material, wherein the first matrix material comprises a polymer or silicone having a plurality of cross-linked acrylate groups and the polymer or silicone having a plurality of cross-linked acrylate groups comprises a urethane acrylate, acrylated silicone, urethane acrylate epoxy mixture, or a combination thereof.
A method of manufacturing a solid state lighting device comprising:
- providing a light source;
- dispersing quantum dots in a polymer or silicone having acrylate groups to form a first matrix material;
- depositing the first matrix material either directly or indirectly on top of the light source;
- and
- cross-linking the acrylate groups in the first matrix material to form a solid active layer,
- wherein the first matrix material comprises a polymer or silicone having a plurality of cross-linked acrylate groups and the polymer or silicone having a plurality of cross-linked acrylate groups comprises a urethane acrylate, acrylated silicone, urethane acrylate epoxy mixture, or a combination thereof.
A solid state lighting device comprising:
- a light source;
- and
- an active layer deposited either directly or indirectly on the light source, the active layer comprising:
- a first matrix material, wherein the first matrix material comprises a polymer or silicone having a plurality of cross-linked acrylate groups and the polymer or silicone having a plurality of cross-linked acrylate groups comprises a urethane acrylate, acrylated silicone, urethane acrylate epoxy mixture, or a combination thereof;
- a population of quantum dots dispersed in the first matrix material;
- and
- non-absorbing light scattering dielectric particles dispersed in the first matrix material, wherein the particles have a diameter between 2 nanometers and 50 microns, have refractive indices greater than that of the first matrix material, and are substantially non-absorbent to light emitted by the light source or the population of quantum dots.
A solid state lighting device comprising:
- a light source;
- a first active layer deposited either directly or indirectly on top of the light source, the first active layer comprising a first population of quantum dots dispersed in a first matrix material, wherein the first matrix material comprises a polymer or silicone having a plurality of cross-linked acrylate groups and the polymer or silicone having a plurality of cross-linked acrylate groups comprises a urethane acrylate, acrylated silicone, urethane acrylate epoxy mixture, or a combination thereof;
- and
- a second active layer deposited either directly or indirectly on top of the first active layer, the second active layer comprising a second population of different quantum dots.
Dependencies are inferred from the claim text.