Patent ID: 8446090

Claim:
An organic light-emitting device comprising: an anode; a cathode; and an emission layer between the anode and the cathode, wherein the cathode comprises: a first layer in which are co-deposited LiF or Liq and a metal selected from the group consisting of ytterbium (Yb), calcium (Ca), samarium (Sm), europium (Eu), terbium (Tb), strontium (Sr), barium (Ba), lanthanum (La), and cerium (Ce); and a second layer in which are co-deposited silver (Ag) or aluminum (Al), and a metal selected from the group consisting of Yb, Ca, Sm, Eu, Tb, Sr, Ba, La, and Ce; wherein the composition ratio of the LiF or Liq to the metal selected from the group consisting of Yb, Ca, Sm, Eu, Tb, Sr, Ba, La, and Ce in the first layer is from about 2:8 to about 8:2.