Light-emitting device containing flattened anisotropic colloidal semiconductor nanocrystals and processes for manufacturing such devices
US9447927B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2014 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Jul 11, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/95
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A device that emits light in response to an electrical or optical excitation, such as LEDs, displays, e-readers, device includes at least one anisotropic flat colloidal semiconductor nanocrystal whose smallest dimension, namely the thickness, is smaller than the other two by a factor of at least 1.5, the emitted light having an intensity and a polarization that vary according to the angle formed by the light emitting direction and the normal to the largest surface of the flat nanocrystal. The device allows to realize a light-emitting device exhibiting simultaneously a high emission spectral finesse and allows proper control of the wavelength, the directivity and/or polarization of the emitted light, and thus increases the brightness and color gamut of displays composed of such a device. Such devices are found for example in displays, televisions, mobile phones, tablets, or computers. The various embodiments of these devices are also presented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.