Organic light-emitting element and method of producing an organic light-emitting element
View Patent ↗An organic light-emitting component includes a substrate on which a functional layer stack is applied, the stack including a first electrode, an organic functional layer stack thereover including an organic light-emitting layer and a translucent second electrode thereover, and a translucent halogen-containing thin-film encapsulation arrangement over the translucent second electrode, wherein a translucent protective layer having a refractive index of more than 1.6 is arranged directly on the translucent second electrode between the translucent second electrode and the thin-film encapsulation arrangement.
1. A method of producing an organic light-emitting component comprising:
providing a substrate on which a functional layer stack is applied, the stack comprising a first electrode, an organic functional layer stack thereover comprising an organic light-emitting layer and a translucent second electrode thereover,
applying a translucent protective layer directly on the translucent second electrode with a halogen-free metalorganic compound, the protective layer having a refractive index of more than 1.6; and
applying a translucent thin-film encapsulation arrangement on the translucent protective layer with a metal compound containing halogen.
2. The method according to claim 1 , wherein the protective layer has a refractive index of more than 1.8.
3. The method according to claim 1 , wherein the protective layer and the thin-film encapsulation arrangement are respectively applied by an atomic layer deposition method.
4. The method according to claim 1 , wherein the protective layer is applied at a temperature less than or equal to 150° C.
5. The method according to claim 4 , wherein the protective layer is applied at a temperature less than or equal to 120° C.
6. The method according to claim 1 , wherein the halogen-free metalorganic compound comprises a tetrakis(dimethylamine) or an alcoholate.
7. The method according to claim 1 , wherein the halogen-free metalorganic compound contains Zr, Ti, Zn, Hf, Sn, Ta or V.
8. The method according to claim 1 , wherein the translucent second electrode comprises at least one selected from the group consisting of a transparent conductive oxide, Al, Cu, Ag, Au, Pt, Pd, Mg, Ca, Sr, Ba, Ge, Sn, Li, Sm, Y, Yb, Ti, Zr and Zn.
9. The method according to claim 1 , wherein the protective layer has a refractive index of more than 2.0.
10. The method according to claim 5 , wherein the temperature is less than or equal to 90° C.
11. The method of claim 1 , wherein the protective layer comprises at least one material selected from the group consisting of zirconium dioxide, titanium dioxide, zinc oxide, hafnium oxide, tin oxide, tantalum oxide and vanadium oxide.
12. The method of claim 1 , wherein the protective layer is halogen free.
13. The method of claim 1 , wherein the substrate and the first electrode are translucent.
14. The method of claim 1 , wherein the protective layer has a refractive index of more than 2.0.
15. A method of producing an organic light-emitting component comprising:
providing a substrate on which a functional layer stack is applied, the stack comprising a first electrode, an organic functional layer stack thereover comprising an organic light-emitting layer and a translucent second electrode thereover;
applying at a temperature less than or equal to 150° C. a translucent protective layer directly on the translucent second electrode with a halogen-free metal compound, the protective layer having a refractive index of more than 1.6; and
applying a translucent thin-film encapsulation arrangement on the translucent protective layer with a metal compound containing halogen.