The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 2020
Filed:
Mar. 22, 2018
Sharp Kabushiki Kaisha, Osaka, JP;
James Andrew Robert Palles-Dimmock, Oxford, GB;
Edward Andrew Boardman, Oxford, GB;
Tim Michael Smeeton, Oxford, GB;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A light-emitting device is optimized for radiative recombination and minimizes non-radiative recombination. The light-emitting device includes an emissive layer, a first electrode and a second electrode from which charges are generated, a first charge transport layer that injects charges from the first electrode into the emissive layer, and a second charge transport layer that injects charges from the second electrode into the emissive layer. At least one of the charge transport layers includes a mixture of a first nanoparticle population and a second nanoparticle population, and the first nanoparticle population and the second nanoparticle population are conductive nanoparticles that are energetically non-aligned as between the first nanoparticle population and the second nanoparticle population. Nanoparticles of the first nanoparticle population and the second nanoparticle population are energetically non-aligned with each other by being made of different materials, by having nanoparticles of different sizes, and/or by having nanoparticles of different shapes.