| abstract |
An OLED device including spaced anode and cathodes; at least one light-emitting layer, and a hole-transporting layer disposed between the anode and the light-emitting layer; and a first electron-transporting layer in contact with at least one light-emitting layer and a second electron-transporting layer in contact with the first electron-transporting layer, wherein the first and second electron-transporting layers are disposed between the at least one light-emitting layer and the cathode, wherein: the first electron-transporting layer contains an anthracene compound; and the second electron-transporting layer contains an anthracene compound and at least one salt or complex of an element selected from Group 1, 2, 12 or 13 of the Periodic Table, and is further doped with an alkali metal. |