Cadmium-free quantum dot nanoparticles

A technology of nanoparticles and quantum dots, applied in the field of quantum dot nanoparticles, can solve problems such as difficulty in obtaining
CN105899640AActive Publication Date: 2016-08-24NANOCO TECH LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANOCO TECH LTD
Publication Date
2016-08-24

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Abstract

The invention discloses cadmium-free quantum dot nanoparticles. Quantum dot semiconductor nanoparticle compositions that incorporate ions such as zinc, aluminum, calcium, or magnesium into the quantum dot core have been found to be more stable to Ostwald ripening. A core-shell quantum dot may have a core of a semiconductor material that includes indium, magnesium, and phosphorus ions. Ions such as zinc, calcium, and / or aluminum may be included in addition to, or in place of, magnesium. The core may further include other ions, such as selenium, and / or sulfur. The core may be coated with one (or more) shells of semiconductor material. Example shell semiconductor materials include semiconductors containing zinc, sulfur, selenium, iron and / or oxygen ions.
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Description

[0001] Cross references to related applications:

[0002] This application claims the benefit of US Provisional Application No. 61 / 924,031, filed January 6, 2014.

[0003] Statement Regarding Federally Sponsored Research or Development: Not Applicable Background of the invention

[0004] 1. Field of invention.

[0005] The present invention generally relates to quantum dot nanoparticles. More specifically, it relates to the synthesis of quantum dot nanoparticles that do not contain cadmium or other heavy metals.

[0006] 2. Includes descriptions of related art based on information disclosed in 37 CFR 1.97 and 1.98.

[0007] There has been substantial interest in the preparation and characterization of compound semiconductor particles, commonly referred to as quantum dots (QDs) and / or nanocrystals, with dimensions on the order of 2-100 nm. This interest is mainly due to their size-tunable electronic, optical and chemical properties. For example, many QDs show relatively s...

Claims

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