| abstract |
An organic EL device has a hole injecting electrode, an electron injecting electrode, at least one organic layer between the electrodes, and an inorganic insulating hole injecting and transporting layer between the hole injecting electrode and the organic layer. The inorganic insulating hole injecting and transporting layer contains silicon oxide and/or germanium oxide as a main component, the main component being represented by (Si1-xGex)Oy wherein 0<=x<=1 and 1.8<=y<=2.5, and further contains 0.01 to 2% by weight of at least one element selected from among Ar, Kr, Xe, and Ne. The device has the advantages of both organic and inorganic materials, a long lifetime, improved efficiency, low operating voltage, and low cost, and can provide a high luminance of light emission when applied to displays of the time-division driving mode, and realize large screen, high definition displays. |