| 摘要 |
A top-emitting organic light emissive device (OLED) comprises a cathode and an anode 32, which an organic light emissive region 33 between the anode and the cathode. The cathode comprises a transparent bilayer of a low work function metal 34 having a work function of no more than 3.5eV and a transparent layer of silver 38. The low workfunction metal is preferably an alkali metal or alkaline earth metal, in particular calcium, barium or lithium. The silver layer thickness may be between 2nm and 18nm. |
