| 摘要 |
<p>An object of the present invention is to provide an organic EL device capable of utilizing the advantages of both organic and inorganic materials and having a high efficiency, long lifetime, and low cost. The object is attained by an organic EL device comprising a substrate, a hole injecting electrode and an electron injecting electrode formed on the substrate, and an organic material-containing organic layer between the electrodes, the organic layer including a light emitting layer containing a conjugated polymer, the device further comprising an inorganic electron injecting and transporting layer between the light emitting layer and the electron injecting electrode, the inorganic electron injecting and transporting layer comprising at least one oxide selected from lithium oxide, rubidium oxide, potassium oxide, sodium oxide, and cesium oxide as a first component, at least one oxide selected from strontium oxide, magnesium oxide, and calcium oxide as a second component, and silicon oxide and/or germanium oxide as a third component. The device may further have an inorganic hole injecting layer between the light emitting layer and the hole injecting electrode, the inorganic hole injecting layer comprising silicon oxide and/or germanium oxide as a main component, the main component having an average composition represented by the formula: (Si1-xGex)Oy wherein 0≤x≤1 and 1.7≤y≤1.99, as analyzed by Rutherford back-scattering. <IMAGE></p> |
