Fluorescent quantum dots as well as preparation method and use thereof
US12408505B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2021 |
| Grant date | Sep 2, 2025 |
| Priority date | — |
| Expiry date | Dec 6, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/881
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The preparation method for fluorescent quantum dots includes: carrying out solvothermal reaction on a first evenly mixed reaction system containing a silver source, a negative ion source and a weakly polar solvent to prepare a silver-based quantum dots precursor; and carrying out ion exchange reaction on a second evenly mixed reaction system containing the silver-based quantum dots precursor, a negative ion source and/or a metal positive ion source to obtain alloyed fluorescent quantum dots with a fluorescence emission peak wavelength of 500-1700 nm and an absolute quantum efficiency of more than 85%. The silver-based quantum dots are prepared through a simple high-temperature solvothermal method and then the alloyed quantum dots are obtained by the ion exchange method, and therefore the synthesis process is simple and controllable. The obtained fluorescent quantum dots can be prepared on large scale, and have adjustable fluorescence emission from visible to near-infrared region and excellent photostability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.