Organic electroluminescent device
US6284394A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1999 |
| Grant date | Sep 4, 2001 |
| Priority date | — |
| Expiry date | Jan 29, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/917
Abstract
The organic EL device of the present invention fulfils the object of realizing an EL device which exhibits an excellent electron and hole injecting efficiency and an improved light emitting efficiency and which can be operated at a low drive voltage and manufactured at a reduced cost. In order to attain such object, the organic EL device comprises a hole injecting electrode, an electron injecting electrode, and one or more organic layers between the electrodes wherein at least one of said organic layers has a light emitting function. A high resistivity inorganic electron injecting layer is provided between said organic layer and said electron injecting electrode. This layer comprises a first component comprising at least one oxide of an element selected from alkali metal elements, alkaline earth metal elements, and lanthanide elements, and a second component comprising at least one metal having a work function of 3 to 5 eV, and this layer has conduction paths for hole blockage and electron transportation. An inorganic insulative hole injecting and transporting layer is provided between the light emitting layer and the hole injecting layer. This layer contains oxide of silicon and/o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.