Organic electroluminescent device with graded region
US5925980A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1997 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | May 1, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K50/11
Abstract
An organic electroluminescent device with graded region is formed, which includes a hole transporting region formed of hole transporting organic material, an electron transporting region formed of electron transporting organic material, and a graduated region disseminated between the hole transporting region and the electron transporting region. The graduated region changes, either in steps or continuously, from hole transporting organic material adjacent the hole transporting region to electron transporting organic material adjacent the electron transporting region. Electrical contacts are formed in communication with the hole transporting region and the electron transporting region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.