Quantum Dot White and Colored Light-Emitting Devices
First Claim
1. A light emitting device comprising:
- a primary light source; and
at least one layer in optical communication with the primary light source, wherein the at least one layer comprises a matrix including a plurality of quantum dots having a polydisperse size distribution and adapted to convert primary light emitted by the primary light source to secondary light, wherein the secondary light comprises a mixed color of light or white light.
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Accused Products
Abstract
A light-emitting device comprising a population of quantum dots (QDs) embedded in a host matrix and a primary light source which causes the QDs to emit secondary light and a method of making such a device. The size distribution of the QDs is chosen to allow light of a particular color to be emitted therefrom. The light emitted from the device may be of either a pure (monochromatic) color, or a mixed (polychromatic) color, and may consist solely of light emitted from the QDs themselves, or of a mixture of light emitted from the QDs and light emitted from the primary source. The QDs desirably are composed of an undoped semiconductor such as CdSe, and may optionally be overcoated to increase photoluminescence.
7 Citations
32 Claims
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1. A light emitting device comprising:
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a primary light source; and at least one layer in optical communication with the primary light source, wherein the at least one layer comprises a matrix including a plurality of quantum dots having a polydisperse size distribution and adapted to convert primary light emitted by the primary light source to secondary light, wherein the secondary light comprises a mixed color of light or white light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of producing light of a selected color, comprising:
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providing a primary light source which emits primary light; providing at least one layer comprising a matrix including a plurality of quantum dots having a polydisperse size distribution; and disposing the at least one layer in optical communication with and physically separated from the primary light source, whereby the plurality of quantum dots are capable of converting primary light emitted by the primary light source to secondary light, wherein the secondary light comprises a mixed color of light or white light. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32)
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Specification