Quantum dot light enhancement substrate and lighting device including same

Patent metadata

Field	Value
Publication number	US-10096744-B2
Application number	US-201715619731-A
Country	US
Kind code	B2
Filing date	Jun 12, 2017
Priority date	Jul 23, 2007
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

A component including a substrate, at least one layer including a color conversion material including quantum dots disposed over the substrate, and a layer including a conductive material (e.g., indium-tin-oxide) disposed over the at least one layer. (Embodiments of such component are also referred to herein as a QD light-enhancement substrate (QD-LES).) In certain preferred embodiments, the substrate is transparent to light, for example, visible light, ultraviolet light, and/or infrared radiation. In certain embodiments, the substrate is flexible. In certain embodiments, the substrate includes an outcoupling element (e.g., a microlens array). A film including a color conversion material including quantum dots and a conductive material is also provided. In certain embodiments, a component includes a film described herein. Lighting devices are also provided. In certain embodiments, a lighting device includes a film described herein. In certain embodiments, a lighting device includes a component described herein.

First claim

What is claimed is:

1. A lighting device including:
a substrate comprising a material that is transparent to light within a predetermined range of wavelengths, the substrate including one or more optical member on a surface of the substrate;
a color conversion material comprising quantum dots and disposed over a predetermined region of a surface of the substrate opposite the optical member;
a first electrode disposed over at least a portion of the color conversion material, the first electrode being transparent to light within a second predetermined range of wavelengths;
an emissive layer disposed over at least a portion of the first electrode, wherein the emissive layer comprises a material capable of emitting blue light; and
a second electrode disposed over the emissive layer.

2. A lighting device in accordance with claim 1 , wherein the optical member comprises a microlens array.

3. A lighting device in accordance with claim 1 , wherein the optical member comprises a micro-relief structure.

4. A lighting device in accordance with claim 1 , wherein the optical member comprises a substantially hemispherical surface.

5. A lighting device in accordance with claim 1 , wherein the optical member comprises a curved surface.

6. A lighting device in accordance with claim 1 , wherein the color conversion material including quantum dots is included in a layer comprising a predetermined arrangement of sub-layers disposed over a predetermined region of a surface of the substrate.

7. A lighting device in accordance with claim 1 , wherein the color conversion material including quantum dots is included in a layered arrangement including two or more layers disposed over a predetermined region of a surface of the substrate.

8. A lighting device in accordance with claim 1 , wherein the device further comprises one or more charge transport layers between the first and second electrodes.

9. A lighting device in accordance with claim 1 , wherein the device further comprises one or more charge injection layers between the first and second electrodes.

10. A lighting device in accordance with claim 1 , wherein the device comprises an OLED.

11. A lighting device in accordance with claim 1 , wherein the emissive layer comprises quantum dots.

12. A lighting device in accordance with claim 1 , wherein the device comprises a thin film light emitting device.

13. A lighting device in accordance with claim 1 , wherein the device comprises a thin film electroluminescent device.

14. A light emitting device in accordance with claim 6 , wherein a first portion of the sub-layers comprises optically transparent scatterers or non-scattering material, a second portion of the sub-layers comprises quantum dots capable of emitting red light, and a third portion of the sub-layers comprises quantum dots capable of emitting green light.

15. A light emitting device in accordance with claim 6 , wherein a first portion of the sub-layers comprises optically transparent scatterers or non-scattering material, and a second portion of the sub-layers comprises quantum dots capable of emitting yellow light.

16. A light emitting device in accordance with claim 7 , wherein the layered arrangement comprises a first film including quantum dots capable of emitting red light, and a second film including quantum dots capable of emitting green light, and a third film including scatterers or non-scattering material to outcouple light.

17. A light emitting device in accordance with claim 7 , wherein the layered arrangement comprises a first film including quantum dots capable of emitting yellow light, a second film including scatterers or non-scattering material to outcouple light.

18. A lighting device in accordance with claim 16 , wherein the first film, the second film, and the third film are formed in order with the first film being nearest the first electrode.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Coe-Sullivan Seth
• Kazlas Peter

Classifications

• H01L33/507

  Electricity · mapped topic

• H01L33/06 Primary

  Electricity · mapped topic

• Y10S977/774

  Exhibiting three-dimensional carrier confinement, e.g. quantum dots · CPC title

• H01L27/322

  Electricity · mapped topic

• H01L31/035218

  Electricity · mapped topic