Organic electroluminescent device having an electron- and/or exciton-blocking layer comprising an indolocarbazole compound
US9290498B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 19, 2010 |
| Grant date | Mar 22, 2016 |
| Priority date | — |
| Expiry date | Sep 15, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K50/181
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secure of driving stability, and of a simple configuration. The organic EL device comprises organic layers comprising a hole-transporting layer and a light-emitting layer sandwiched between an anode and a cathode. The light-emitting layer contains a fluorescent light-emitting material and an electron- and/or exciton-blocking layer containing an indolocarbazole derivative represented by general formula (2) is disposed between the hole-transporting layer and the light-emitting layer so as to be adjacent to the light-emitting layer. In general formula (2), ring B is a heterocyclic ring fused to the adjacent rings and represented by formula (1c), Z is an n-valent aromatic hydrocarbon group or aromatic heterocyclic group, and n is 1 or 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.