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US 11,459,243 B2Granted
Core shell particle, method of producing core shell particle, and film
AssigneeFUJIFILM Corporation
InventorHiroshi Isojima
Life of this patent
Estimating the term…
Abstract
Provided are a core shell particle including a core which contains a Group III element and a Group V element, and a shell which covers at least a part of a surface of the core and contains a Group II element and a Group VI element, in which the core shell particle has a tetrahedral shape having one side with a length of 6 nm or greater; a method of producing the core shell particle; and a film formed of the core shell particle.
Claims18
A core shell particle comprising:
- a core which contains a Group III element and a Group V element;
- and
- a shell which covers at least a part of a surface of the core and contains a Group II element and a Group VI element,
- wherein the core shell particle has a tetrahedral shape having one side with a length of 6 nm or greater,
- wherein an emission wavelength peak of the core shell particle is at 640 nm or greater, and
- wherein the core shell particle has a luminous efficacy of 50% or greater.
3 more elements
A method of producing a core shell particle, comprising:
- a first step of mixing a Group III raw material containing a Group III element with a Group II raw material containing a Group II element to prepare a mixed solution containing the raw materials dissolved therein;
- a second step of adding a Group V raw material containing a Group V element to the mixed solution to form a core containing the Group III element and the Group V element;
- and
- a third step of adding a Group VI raw material containing a Group VI element to the mixed solution after the formation of the core to form a shell containing the Group II element and the Group VI element in at least a part of a surface of the core,
- wherein the second step is a step of forming the core by adding the Group V raw material to the mixed solution at a temperature of 130° C. or lower and increasing the temperature to a temperature range of 200° C. to 240° C. at a temperature increase rate of 0.4° C./min or less.
2 more elements
Dependencies are inferred from the claim text.