| 摘要 |
There is provided an organic electroluminescence device includes: a pair of electrodes formed of an anode and a cathode; and an organic compound layer provided between the pair of electrodes, in which the organic electroluminescence device contains a cesium suboxide in which an element ratio A/B calculated from an area ratio of a peak A at a binding energy of 726.0 eV±0.5 eV corresponding to a Cs3d5 orbital measured by X-ray photoelectron spectroscopy to a peak B at binding energy of 531.0 eV±0.5 eV corresponding to an O1s orbital measured by the X-ray photoelectron spectroscopy is in a range of 3.1 to 7.3. The organic electroluminescence device has excellent light emitting property that is not largely impaired even after the device is driven for a long time period.
|
