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US 9,790,424 B2Granted
Highly luminescent color-selective nanocrystalline materials
AssigneeMassachusetts Institute of Technology
InventorsMoungi G. Bawendi, Klavs F. Jensen, Bashir O. Dabbousi, Javier Rodriguez-Viejo, Frederic Victor Mikulec
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Abstract
A nanocrystal capable of light emission includes a nanoparticle having photoluminescence having quantum yields of greater than 30%.
Claims7
A monodisperse population of nanocrystals comprising:
- a plurality of nanocrystal particles, wherein each particle includes a core including a first semiconductor material and an overcoating including a second semiconductor material deposited on the core;
- wherein the first semiconductor material and the second semiconductor material are different;
- wherein the monodisperse population emits light in a spectral range of no greater than about 37 nm full width at half max (FWHM);
- wherein the overcoating is a crystalline overcoating;
- and
- wherein the monodisperse population exhibits photoluminescence having a quantum yield of greater than 30%.
3 more elements
A coated nanocrystal capable of light emission, comprising:
- a core comprising a first semiconductor material, said core being a member of a monodisperse particle population;
- and
- an overcoating uniformly deposited on the core comprising a second semiconductor material,
- wherein the first semiconductor material and the second semiconductor material are different,
- wherein the monodisperse particle population is characterized in that it exhibits no more than about 10% rms deviation in the diameter of the core, and
- and wherein the monodisperse particle population is characterized in that when irradiated the population emits light in a spectral range of no greater than about 37 nm full width at half max (FWHM) and the coated nanocrystal exhibits photoluminescence having quantum yields in the range of at least 30%.
3 more elements
Dependencies are inferred from the claim text.