Colloidal ternary group III-V nanocrystals synthesized in molten salts
AssigneeThe University of Chicago
InventorsDmitri V. Talapin, Vishwas Srivastava
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Abstract
Methods of synthesizing colloidal ternary Group III-V nanocrystals are provided. Also provided are the colloidal ternary Group III-V nanocrystals made using the methods. In the methods, molten inorganic salts are used as high temperature solvents to carry out cation exchange reactions that convert binary nanocrystals into ternary nanocrystals.
Claims20
Core-shell In1-xGaxP nanocrystals, each comprising an In1-xGaxP core consisting of only In1-xGaxP alloy and having a surface, where 0.2≤x≤0.85, and a ZnS shell on the surface of the In1-xGaxP core, wherein the core-shell In1-xGaxP nanocrystals absorb blue light and emit green or red photoluminescence, the green or red photoluminescence characterized by a photoluminescence peak maximum in the range from 490 nm to 640 nm and a photoluminescence peak full-width-half-maximum of 60 nm or lower at a temperature of 25° C.
A method of generating light, the method comprising irradiating core-shell In1-xGaxP nanocrystals, where 0.2≤x≤0.85, with blue light, wherein the core-shell In1-xGaxP nanocrystals absorb the blue light and emit green or red photoluminescence, the green or red photoluminescence characterized by a photoluminescence peak maximum in the range from 490 nm to 640 nm and a photoluminescence peak full-width-half-maximum of 60 nm or lower at a temperature of 25° C., and further wherein each core-shell In1-xGaxP nanocrystal comprises an In1-xGaxP core consisting of only In1-xGaxP alloy and having a surface and a ZnS shell on the surface of the In1-xGaxP core.
Core-shell In1-xGaxP nanocrystals, each comprising an In1-xGaxP core having a surface, where 0.4≤x≤0.85, and a ZnS shell around the In1-xGaxP core, wherein the ZnS shell is in contact with the surface of the In1-xGaxP core where it is present around said core, and further wherein the core-shell In1-xGaxP nanocrystals absorb blue light and emit green or red photoluminescence, the green or red photoluminescence characterized by a photoluminescence peak maximum in the range from 490 nm to 640 nm and a photoluminescence peak full-width-half-maximum of 60 nm or lower at a temperature of 25° C.
A method of generating light, the method comprising irradiating core-shell In1-xGaxP nanocrystals, where 0.4≤x≤0.85, with blue light, wherein the core-shell In1-xGaxP nanocrystals absorb the blue light and emit green or red photoluminescence, the green or red photoluminescence characterized by a photoluminescence peak maximum in the range from 490 nm to 640 nm and a photoluminescence peak full-width-half-maximum of 60 nm or lower at a temperature of 25° C., and further wherein each core-shell In1-xGaxP nanocrystal comprises an In1-xGaxP core having a surface and a ZnS shell around the In1-xGaxP core, wherein the ZnS shell is in contact with the surface of the In1-xGaxP core where it is present around said core.
Dependencies are inferred from the claim text.