Organic EL element including a hole injection layer with a proportion of sulphur atoms relative to metal atoms
US9105868B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 28, 2012 |
| Grant date | Aug 11, 2015 |
| Priority date | — |
| Expiry date | Aug 28, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K59/874
Abstract
An organic EL element has an anode and a cathode a light-emitting layer including an organic material provided between the anode and the cathode, a hole injection layer provided between the anode and the light-emitting layer, and a electron injection layer provided between the light-emitting layer and the cathode 7. The hole injection layer and the electron injection layer include metal atoms and sulphur atoms. The sulphur concentration in the hole injection layer and the electron injection layer is no less than 96 ppm and no more than 439 ppm in terms of numerical ratio of sulphur atoms to metal atoms in the hole injection layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.