Organic electroluminescent element and organic electroluminescent device
US9525009B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2014 |
| Grant date | Dec 20, 2016 |
| Priority date | — |
| Expiry date | May 9, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/90
Abstract
The objection of invention is to provide an organic electroluminescent element having an excellent current-voltage property. The organic electroluminescent element of the invention comprises an anode, a light emitting layer and a cathode, in this order, wherein a total number of kinds of an electron transport material and a light emitting material contained in the light emitting layer is five or more. Preferably, a total number of kinds of an electron transport material contained in the light emitting layer is four or more, and at least one of an ionization potential and an electron affinity of three kinds or more of the electron transport materials contained in the light emitting layer is different from each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.