Quantum dot films, lighting devices, and lighting methods
First Claim
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1. A quantum dot (QD) phosphor film, comprising:
- a QD phosphor material comprising at least one population of QDs embedded in at least one matrix material, wherein the QDs emit secondary light upon absorbance of primary light;
at least one bottom barrier film disposed on a first surface of the QD phosphor material;
at least one top barrier film disposed on a second surface of the QD phosphor material, wherein the second surface is opposite the first surface, and wherein the at least one top barrier film comprises a brightness enhancing film configured to reflect a portion of the primary light towards the QD phosphor material, such that the portion of the primary light has an increased optical path length within the QD phosphor material to cause increased primary light absorption by the QDs and thereby increase emission of secondary light; and
wherein the QD phosphor material is disposed between the at least one top barrier film and the at least one bottom barrier film.
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Abstract
Light-emitting quantum dot films, quantum dot lighting devices, and quantum dot-based backlight units are provided. Related compositions, components, and methods are also described. Improved quantum dot encapsulation and matrix materials are provided. Quantum dot films with protective barriers are described. High-efficiency, high brightness, and high-color purity quantum dot-based lighting devices are also included, as well as methods for improving efficiency and optical characteristics in quantum dot-based lighting devices.
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Citations
71 Claims
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1. A quantum dot (QD) phosphor film, comprising:
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a QD phosphor material comprising at least one population of QDs embedded in at least one matrix material, wherein the QDs emit secondary light upon absorbance of primary light; at least one bottom barrier film disposed on a first surface of the QD phosphor material; at least one top barrier film disposed on a second surface of the QD phosphor material, wherein the second surface is opposite the first surface, and wherein the at least one top barrier film comprises a brightness enhancing film configured to reflect a portion of the primary light towards the QD phosphor material, such that the portion of the primary light has an increased optical path length within the QD phosphor material to cause increased primary light absorption by the QDs and thereby increase emission of secondary light; and wherein the QD phosphor material is disposed between the at least one top barrier film and the at least one bottom barrier film. - 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, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
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59. A method of forming a quantum dot (QD) phosphor film, comprising:
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(a) providing at least one bottom barrier film; (b) providing a QD phosphor material comprising at least one population of QDs embedded in at least one matrix material, wherein the QDs emit secondary light upon absorbance of primary light; (c) disposing the QD phosphor material on the at least one bottom barrier film; and (d) disposing at least one top barrier film over the QD phosphor material, wherein the at least one top barrier film comprises a brightness enhancing film configured to reflect a portion of the primary light towards the QD phosphor material, such that the portion of the primary light has an increased optical path length within the QD phosphor material to cause increased primary light absorption by the QDs and thereby increase emission of secondary light. - View Dependent Claims (60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71)
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Specification