Cadmium-free semiconductor nanocrystal particles having high quantum efficiency, production methods thereof, and devices including the same
US11566345B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2019 |
| Grant date | Jan 31, 2023 |
| Priority date | — |
| Expiry date | Jan 30, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/64
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A semiconductor nanocrystal particle, a production method thereof, and a light emitting device including the same. The semiconductor nanocrystal particle includes a core including a first semiconductor nanocrystal, a first shell surrounding the core, the first shell including a second semiconductor nanocrystal including a different composition from the first semiconductor nanocrystal, a second shell surrounding the first shell, the second shell including a third semiconductor nanocrystal including a different composition from the second semiconductor nanocrystal, wherein the first semiconductor nanocrystal includes zinc and sulfur; wherein the third semiconductor nanocrystal includes zinc and sulfur; wherein an energy bandgap of the second semiconductor nanocrystal is less than an energy bandgap of the first semiconductor nanocrystal and less than an energy bandgap of the third semiconductor nanocrystal; and wherein the semiconductor nanocrystal particle does not include cadmium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.