Organic light-emitting device
View Patent ↗An organic light-emitting device including an anode, a cathode having a double-layered structure, and an emission layer between the anode and the cathode.
1. 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.
2. The organic light-emitting device of claim 1 , wherein the first layer has a thickness of about 10Åto about 300Å.
3. The organic light-emitting device of claim 1 , wherein the metal selected from the group consisting of Yb, Ca, Sm, Eu, Tb, Sr, Ba, La, and Ce in the second layer is from about 1% to about 50% based on the total weight of the second layer.
4. The organic light-emitting device of claim 1 , wherein the second layer has a thickness of about 100Åto about 1000Å.
5. The organic light-emitting device of claim 1 , wherein the cathode comprises:
a first layer in which are co-deposited the LiF and the metal selected from the group consisting of Yb, Ca, Sm, Eu, Tb, Sr, Ba, La, and Ce; and
a second layer in which are co-deposited Ag and the metal selected from the group consisting of Yb, Ca, Sm, Eu, Tb, Sr, Ba, La, and Ce.
6. The organic light-emitting device of claim 1 , wherein the cathode comprises:
a first layer in which are co-deposited the LiF and the metal selected from the group consisting of Yb, Ca, Sm, Eu, Tb, Sr, Ba, La, and Ce; and
a second layer in which are co-deposited Ag and the metal selected from the group consisting of Yb, Ca, Sm, Eu, Tb, Sr, Ba, La, and Ce,
wherein the first layer has a thickness of about 15 Å to about 50 Å, and the second layer has a thickness of about 150 Å to about 230 Å.
7. The organic light-emitting device of claim 1 , wherein the cathode comprises:
a first layer in which are co-deposited the LiF or Liq, and Yb; and
a second layer in which are co-deposited Ag or Al, and Yb,
wherein the first layer has a thickness of about 15 Å to about 50 Å, and the second layer has a thickness of about 150 Å to about 230 Å.
8. The organic light-emitting device of claim 1 , wherein the cathode comprises:
a first layer in which are co-deposited the LiF and the metal selected from the group consisting of Yb, Ca, Sm, Eu, Tb, Sr, Ba, La, and Ce; and
a second layer in which are co-deposited Ag and the metal selected from the group consisting of Yb, Ca, Sm, Eu, Tb, Sr, Ba, La, and Ce,
wherein the composition ratio of the LiF 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 3:7 to about 7:3, and
the metal selected from the group consisting of Yb, Ca, Sm, Eu, Tb, Sr, Ba, La, and Ce in the second layer is from about 5% to about 15% based on the total weight of the second layer.
9. The organic light-emitting device of claim 1 , wherein the cathode comprises:
a first layer in which are co-deposited the LiF or Liq, and Yb; and
a second layer in which are co-deposited Ag or Al, and Yb,
wherein the composition ratio of LiF or Liq to Yb in the first layer is from about 3:7 to about 7:3, and
Yb in the second layer is from about 5% to about 15% based on the total weight of the second layer.
10. The organic light-emitting device of claim 1 , wherein the cathode comprises:
a first layer in which are co-deposited the LiF and Yb; and
a second layer in which are co-deposited Ag and Yb,
wherein the composition ratio of LiF to Yb in the first layer is from about 3:7 to about 7:3, and
wherein Yb in the second layer is from about 5% to about 15% based on the total weight of the second layer.
11. A cathode for an organic light-emitting device,
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.
12. The cathode of claim 11 , wherein the first layer has a thickness of about 10 Å to about 300 Å.
13. The cathode of claim 11 , wherein the metal selected from the group consisting of Yb, Ca, Sm, Eu, Tb, Sr, Ba, La, and Ce in the second layer is from about 1% to about 50% based on the total weight of the second layer.
14. The cathode of claim 11 , wherein the second layer has a thickness of about 100 Å to about 1000 Å.
15. The cathode of claim 11 , wherein the cathode comprises:
a first layer in which are co-deposited the LiF and the metal selected from the group consisting of Yb, Ca, Sm, Eu, Tb, Sr, Ba, La, and Ce; and
a second layer in which are co-deposited Ag and the metal selected from the group consisting of Yb, Ca, Sm, Eu, Tb, Sr, Ba, La, and Ce.
16. The cathode of claim 11 , wherein the cathode comprises:
a first layer in which are co-deposited the LiF and the metal selected from the group consisting of Yb, Ca, Sm, Eu, Tb, Sr, Ba, La, and Ce; and
a second layer in which are co-deposited Ag and the metal selected from the group consisting of Yb, Ca, Sm, Eu, Tb, Sr, Ba, La, and Ce,
wherein the first layer has a thickness of about 15 Å to about 50 Å, and the second layer has a thickness of about 150 Å to about 230 Å.
17. The cathode of claim 11 , wherein the cathode comprises:
a first layer in which are co-deposited the LiF or Liq, and Yb; and
a second layer in which are co-deposited Ag or Al, and Yb,
wherein the first layer has a thickness of about 15 Å to about 50 Å, and the second layer has a thickness of about 150 Å to about 230 Å.
18. The cathode of claim 11 , wherein the cathode comprises:
a first layer in which are co-deposited the LiF and the metal selected from the group consisting of Yb, Ca, Sm, Eu, Tb, Sr, Ba, La, and Ce; and
a second layer in which are co-deposited Ag and the metal selected from the group consisting of Yb, Ca, Sm, Eu, Tb, Sr, Ba, La, and Ce,
wherein the composition ratio of the LiF 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 3:7 to about 7:3, and
the metal selected from the group consisting of Yb, Ca, Sm, Eu, Tb, Sr, Ba, La, and Ce in the second layer is from about 5% to about 15% based on the total weight of the second layer.