Organic light emitting device
View Patent ↗An organic light emitting device including an anode including a lanthanide oxide. The lanthanide oxide is doped with a conductive material including rubidium, titanium, or combinations thereof. The organic light emitting device further includes a cathode, an organic hole transport layer intermediate the anode and cathode, and an electron injection layer intermediate the anode and cathode.
1. An organic light emitting device comprising:
an anode, comprising a lanthanide oxide wherein said oxide is doped with a conductive material selected from the group consisting of rubidium, titanium, and combinations thereof;
a cathode;
an organic hole transport layer intermediate the anode and cathode; and
an electron injection layer intermediate the anode and cathode.
2. The organic light emitting device of claim 1 , further including an organic light emission layer intermediate the anode and cathode.
3. The organic light emitting device of claim 2 , wherein said organic light emission layer has a thickness which varies across the layer.
4. The organic light emitting device of claim 3 , wherein said light emission layer has a maximum thickness of up to 250 nm.
5. The organic light emitting device of claim 3 , wherein said light emission layer has a minimum thickness of at least 5 nm.
6. The organic light emitting device of claim 3 , wherein a ratio between a thickest portion and thinnest portion of said light emission layer is at least 2:1.
7. The organic light emitting device of claim 1 , wherein said light emission layer comprises tris(8-hydroxyquinoline) aluminum doped with a material selected from the group consisting of platinum octaethylporphyrin, nickel octaethylporphyrin, and chromium octaethylporphyrin, and mixtures thereof.
8. The organic light emitting device of claim 1 , wherein said lanthanide oxide includes a oxide selected from the group consisting of La 2 O 3 , Tb 4 O 7 , Er 2 O 3 , Lu 2 O 3 , Nd 0.5 Sr 0.5 MnO 3 , Nd 0.5 Ca 0.5 MnO 3 , Sm 0.5 Ca 0.5 MnO 3 , Dy 0.5 Ca 0.5 MnO 3 and Ho 0.5 Ca 0.5 MnO 3 , LaNi x Fe 1-x O 3 where 0<x<0.9, La 1-y Nd y Fe 0.5 Cr 0.5 O 3 where y=0.10, 0.15 or 0.20, La 0.7 Sr 0.3 Mn 1-z Ti z O 3 where z=0, 0.10, 0.20, or 0.30, M 3 Fe 4 V 6 O 24 where M is selected from Zn or Mn, and combinations thereof.
9. The organic light emitting device of claim 1 , wherein said anode has a thickness of at least 5 nm.
10. The organic light emitting device of claim 1 , wherein said anode has a thickness of no more than 200 nm.
11. The organic light emitting device of claim 1 , wherein said electron injection layer includes a magnetic metal halide.
12. The organic light emitting device of claim 11 , wherein said magnetic metal halide comprises a halide of a metal selected from the group consisting of nickel, silver, chromium, manganese, cesium, iron and combinations thereof.
13. The organic light emitting device of claim 1 , wherein said electron injection layer has a thickness of at least 0.1 nm.
14. The organic light emitting device of claim 1 , wherein said cathode comprises hafnium oxynitride.
15. The organic light emitting device of claim 14 , wherein the cathode further comprises a material selected from the group consisting of aluminum, nickel, titanium, alloys of aluminum, nickel, and titanium, and conductive polymers.
16. The organic light emitting device of claim 15 , wherein said conductive polymer is selected from a group consisting of polythiophene, poly(p-phenylene vinylenes), poly(3-alkyl thiophenes), nickelphthalocyanine, and combinations thereof.
17. The organic light emitting device of claim 1 , wherein said cathode has a thickness of between 50 and 200 nm.
18. The organic light emitting device of claim 1 , wherein an interface layer spaces said anode from said hole transport layer.
19. The organic light emitting device of claim 1 , wherein said organic light emitting device is supported by a transparent substrate.
20. The organic light emitting device of claim 19 , wherein said substrate is made of glass.
21. The organic light emitting device of claim 19 , further including a compliance and/or heat absorbing layer between said substrate and said anode.
22. A light source comprising at least one organic light emitting device according to claim 1 .
23. A method of manufacturing an organic light emitting device comprising:
forming an anode comprising a lanthanide oxide doped with at least one of titanium and rubidium;
forming a cathode;
disposing an organic hole transport layer intermediate said anode and cathode;
disposing an organic light emission layer intermediate said anode and cathode; and
disposing an electron injection layer intermediate said anode and cathode.
24. An organic light emitting device comprising:
an anode comprising a lanthanide oxide wherein said oxide is doped with a conductive material selected from the group consisting of rubidium, titanium, and combinations thereof;
a cathode including hafnium oxynitride;
an organic hole transport layer intermediate the anode and cathode;
an organic light emission layer intermediate the anode and cathode; and
an electron injection layer intermediate the anode and cathode.
25. An organic light emitting device comprising:
an anode comprising a lanthanide oxide wherein said oxide is doped with a conductive material selected from the group consisting of rubidium, titanium, and combinations thereof;
a cathode;
an organic hole transport layer intermediate the anode and cathode;
an organic light emission layer intermediate the anode and cathode, wherein said organic light emission layer has a gradient, in which the thickness varies across the layer; and
an electron injection layer intermediate the anode and cathode.