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US 11,859,118 B2Granted
Cadmium-free quantum dots, tunable quantum dots, quantum dot containing polymer, articles, films, and 3D structure containing them and methods of making and using them
AssigneeTectus Corporation
InventorsLianhua Qu, Hunaid Nulwala
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Abstract
Quantum dots that are cadmium-free and/or stoichiometncally tuned are disclosed, as are methods of making them. Inclusion of the quantum dots and others in a stabilizing polymer matrix is also disclosed. The polymers are chosen for their strong binding affinity to the outer layers of the quantum dots such that the bond dissociation energy between the polymer material and the quantum dot is greater than the energy required to reach the melt temperature of the cross-linked polymer.
Claims18
A nanocrystal polymer composite comprising a plurality of capped ZnInCuS semiconductor nanocrystals dispersed in a polymer resin, wherein,
- the capped ZnInCuS semiconductor nanocrystals comprise:
- a core comprising ZnInCuS, wherein the core is modified with a zinc alkylcarboxylate or a dialkyl zinc;
- a first cap layer overlying the core, wherein the first cap layer comprises ZnS;
- a second cap layer overlying the first cap layer, wherein the second cap layer comprises Al2O3;
- the capped ZnInCuS semiconductor nanocrystals are configured to emit radiation in a range from 530 nm to 750 nm;
- and
- the polymer resin comprises an acrylate resin, wherein the acrylate resin is derived from homopolymers of cyclohexyl acrylate and cyclohexyl acrylate copolymer with methyl methacrylate or heptyl acrylate.
4 more elements
Dependencies are inferred from the claim text.