Quantum dot and method for producing the same
AssigneeToppan Inc.
InventorsSoichiro Nikata, Yuko Ogura, Mikihiro Takasaki, Yuka Takamizuma
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Abstract
An object is to provide a quantum dot that has a narrow fluorescence half-width and a high fluorescence quantum yield, and emits blue fluorescence. A quantum dot (5) according to the present invention includes at least Zn and Se and does not include Cd, and has a particle diameter of 5 nm or more and 20 nm or less. In addition, the quantum dot (5) according to the present invention includes at least Zn and Se and does not include Cd, and has a fluorescence quantum yield of 58 or more and a fluorescence half-width of 25 nm or less. In the present invention, the fluorescence lifetime can be made 50 ns or less.
Claims9
A quantum dot having a core-shell structure comprising:
- a core formed from Zn, Se, and Te;
- and
- a shell that covers the core and is formed from Zn and S,
- wherein a particle diameter of the quantum dot is 5 nm or more and 20 nm or less, and wherein a nonzero residual amount of Cu is 100 ppm or less relative to Zn.
A manufacturing method for a quantum dot, comprising:
- synthesizing a copper chalcogenide precursor from an organic copper compound or an inorganic copper compound, and an organic chalcogen compound;
- forming a core from Zn, Se, and Te by using the copper chalcogenide precursor;
- and
- covering the core with a shell that is formed from Zn and S.
Dependencies are inferred from the claim text.