Patent ID: 8716928

Claim:
An organic light emitting device comprising: an anode; a cathode; and a light emitting layer disposed between the anode and the cathode, the cathode having a structure comprising a first metal layer, a second metal layer, and a capping layer selected from the group consisting of MoOx, Al 2 O 3 , Sb 2 O 3 , BaO, CdO, CaO, Ce 2 O 3 , CoO, Cu 2 O, DyO, GdO, HfO 2 , La 2 O 3 , Li 2 O, MgO, NbO, NiO, Nd 2 O 3 , PdO, Sm 2 O 3 , ScO, SiO 2 , SrO, Ta 2 O 3 , TiO, WO 3 , VO 2 , YbO, Y 2 O 3 , ZnO, ZrO, wherein x is in a range of 2 to 4, a nitride layer, and a nitric oxide layer, wherein a metal of the second metal layer is Ag, and the first metal layer is an alloy of Ag and Yb, and wherein a weight ratio of Yb to Ag in the first metal layer is approximately 0.1:1 to approximately 15:1.