Lighting device having highly luminescent quantum dots
AssigneePacific Light Technologies Corp.
InventorJuanita N. Kurtin
Life of this patent
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Abstract
Lighting devices having highly luminescent quantum dots are described. In an example, a lighting apparatus includes a housing structure or a substrate. The lighting apparatus also includes a light emitting diode supported within the housing structure or disposed on the substrate, respectively. The lighting apparatus also includes a light conversion layer disposed above the light emitting diode. The light conversion layer includes a plurality of quantum dots. Each quantum dot includes an anisotropic nanocrystalline core having a first semiconductor material and having an aspect ratio between, but not including, 1.0 and 2.0. Each quantum dot also includes a nanocrystalline shell having a second, different, semiconductor material at least partially surrounding the anisotropic nanocrystalline core.
Claims44
A lighting apparatus, comprising:
- a housing structure;
- a light emitting diode supported within the housing structure;
- and
- a light conversion layer disposed above the light emitting diode, the light conversion layer comprising a plurality of quantum dots, each quantum dot having higher wavelength emission and lower wavelength absorption with little to no overlap between emission and absorption and each quantum dot comprising:
- an anisotropic nanocrystalline core comprising a first semiconductor material and having an aspect ratio approximately in the range of 1.01-1.2;
- and
- a nanocrystalline shell comprising a second, different, semiconductor material at least partially surrounding the anisotropic nanocrystalline core.
A lighting apparatus, comprising:
- a substrate;
- a light emitting diode disposed on the substrate;
- and
- a light conversion layer disposed above the light emitting diode, the light conversion layer comprising a plurality of quantum dots, each quantum dot having higher wavelength emission and lower wavelength absorption with little to no overlap between emission and absorption and each quantum dot comprising:
- an anisotropic nanocrystalline core comprising a first semiconductor material and having an aspect ratio approximately in the range of 1.01-1.2;
- and
- a nanocrystalline shell comprising a second, different, semiconductor material at least partially surrounding the anisotropic nanocrystalline core.
Dependencies are inferred from the claim text.