Organic electroluminescent device with a high resistant inorganic electron injecting layer
US6281627A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1999 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Jan 21, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/917
Abstract
To realize an organic EL device having an excellent electron injection efficiency, improved luminous efficiency, low operating voltage, and low cost, the invention provides an organic EL device comprising a hole injecting electrode, an electron injecting electrode, and at least one organic layer between the electrodes, at least one of the organic layer having a light emitting function. The device further has a high resistance inorganic electron injecting layer between the electron injecting electrode and the organic layer. The high resistance inorganic electron injecting layer contains as a first component an oxide of at least one element selected from alkali metal elements, alkaline earth metal elements and lanthanide elements, having a band gap of up to 4 eV and as a second component at least one element selected from Ru, V, Zn, Sm, and In and is capable of blocking holes and has conduction paths for carrying electrons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.