Organic EL element and production method for same
US8927976B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2013 |
| Grant date | Jan 6, 2015 |
| Priority date | — |
| Expiry date | Jan 14, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2102/331
Abstract
An organic EL element includes a hole injection layer yielding excellent hole conduction efficiency, and comprises: an anode; a cathode; a functional layer disposed between the anode and the cathode, and including a light-emitting layer containing organic material; the hole injection layer disposed between the anode and the functional layer; and a bank defining an area in which the light-emitting layer is to be formed, wherein the hole injection layer includes tungsten oxide, tungsten atoms constituting the tungsten oxide include both tungsten atoms with a valence of six and tungsten atoms with a valence less than six, the hole injection layer includes a crystal of the tungsten oxide, a particle diameter of the crystal being on an order of nanometers, an inner portion of the hole injection layer is depressed to define a recess, and an upper peripheral edge of the recess is covered with a part of the bank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.