Organic light emitting device and method of manufacturing the same
US11211576B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2020 |
| Grant date | Dec 28, 2021 |
| Priority date | — |
| Expiry date | Feb 23, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/40
Abstract
An organic light-emitting device including an anode electrode, a hole injection layer on the anode electrode, a hole transport layer on the hole injection layer, an emissive layer on the hole transport layer, and a cathode electrode on the emissive layer. A material of the hole injection layer includes a nitrogen-containing compound having a quinoid structure and a nitrogen-containing compound having a benzenoid structure. A ratio of a peak intensity IB to a peak intensity IA (IB/IA) in a Fourier transform infrared spectroscopy (FTIR) spectrum of the material of the hole injection layer ranges from 1.5 to 2.5, the peak intensity IA and the peak intensity IB being further defined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.