US Patent 8158193 - Highly luminescent color-selective nanocrystals
http://www.freepatentsonline.com/8158193.html
This patent from M.I.T. has priority going back to 1997 and includes some basic claims for nanocrystal core-shell quantum dots. Claim 1 reads:
1. A composition comprising a population of nanocrystals,
wherein each nanocrystal of the population comprises a core including a first semiconductor material and an overcoating including a second semiconductor material deposited on the core,
wherein the population exhibits photoluminescence having a quantum yield of at least 30% and emit light in a spectral range of about 37 nm or less full width at half max (FWHM) when irradiated.
This patent from M.I.T. has priority going back to 1997 and includes some basic claims for nanocrystal core-shell quantum dots. Claim 1 reads:
1. A composition comprising a population of nanocrystals,
wherein each nanocrystal of the population comprises a core including a first semiconductor material and an overcoating including a second semiconductor material deposited on the core,
wherein the population exhibits photoluminescence having a quantum yield of at least 30% and emit light in a spectral range of about 37 nm or less full width at half max (FWHM) when irradiated.
Labels: M.I.T.
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