Method for preparing nanocrystal with core-shell structure
US12351454B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2020 |
| Grant date | Jul 8, 2025 |
| Priority date | — |
| Expiry date | May 9, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8514
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Method for preparing nanocrystals with a core-shell structure is provided. The method includes: providing quantum dot cores; and performing N growth processes of shell layers on a quantum dot core to form a nanocrystal with a core-shell structure. A shell source includes a shell source cation precursor and a shell source anion precursor, and the shell source cation precursor is a metal organic carboxylate. The N growth processes include one or more groups of M growth processes of adjacent shell layers, where N and M are positive integers, N≥2 and N/3≤M≤N−1. Before and/or after performing each group of the M growth processes of adjacent shell layers, one of organic amine and organic carboxylic acid is mixed into a shell-layer-growth-reaction-system after a previous shell layer has formed, to form a mixed system to heat. A subsequent shell layer is grown over the previous shell layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.