Organic EL element, organic EL display apparatus, method for manufacturing organic EL element, and apparatus for manufacturing organic EL element
US7935433B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 25, 2003 |
| Grant date | May 3, 2011 |
| Priority date | — |
| Expiry date | Nov 1, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/80
Abstract
An object of the present invention is to enable suppression of a leak current of an organic EL element while improving a conductivity of the organic EL element and suppressing an operation voltage thereof. An organic EL element is used which comprises at least a luminescent layer, a hole transport layer adjacent to a positive-electrode side of the luminescent layer, and an electron injection transport layer adjacent to a negative-electrode side of the luminescent layer, wherein a hole injection layer is provided between the hole transport layer and the positive electrode, and the conductivity of the hole injection layer continuously changes along a thickness direction of the hole injection layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.