Organic electronic device and method for manufacturing the same
In a coating-type electron injection layer or electron transport layer using a metal oxide, the present invention aims at improving uniformity or stability of composition distribution and adhesion with another adjoining constituent layer, and improving film forming property, to thereby provide an organic electronic device and manufacture of the device whose efficiency is improved. In the organic electronic device having one pair of electrodes on a substrate, and having at least one organic layer between the electrodes, the electron injection layer or the electron transport layer is formed by application of a liquid material in which an alkaline metal salt and zinc-oxide nano particles are dissolved in alcohol.
1. An organic electronic device comprising a pair of electrodes, a substrate, and at least one organic layer between said electrodes, comprising an electron injection layer or electron transport layer formed of a coated film of an alkaline metal salt and zinc-oxide nano particles.
2. An organic electronic device as claimed in claim 1 , wherein said coated film contains an organic polymer binder.
3. An organic electronic device as claimed in claim 1 , wherein said alkaline metal salt is cesium carbonate, sodium 8-quinolinolate or lithium 8-quinolinolate, or a lithium phenolate salt which is either lithium 2-(2-pyridyl) phenolate, or lithium 2-(2′,2″-bipyridine-6′-yl) phenolate.
4. An organic electronic device as claimed in claim 1 , wherein said coated film has a thickness of 1 to 30 nm.
5. An organic electronic device as claimed in claim 2 , wherein said organic polymer binder is selected from the group of poly(4-vinylpyridine), poly(2-vinylpyridine), and polyethylene oxide.
6. An organic electronic device as claimed in claim 1 , wherein said organic layer includes a stack type structure in which a plurality of active layers are stacked.
7. An organic electronic device as claimed in claim 1 , wherein said organic electronic device is an organic electroluminescence element, and said organic layer includes a multi-photon structure in which a plurality of luminescence layers are stacked.
8. A method for manufacturing an organic electronic device as claimed in claim 1 , wherein formation of the electron injection layer or the electron transport layer is carried out by application of an alcohol-borne liquid material.