Organic light-emitting device and method for producing an organic light-emitting device

1. An organic light-emitting device comprising a substrate, a first electrode on the substrate, a first organic functional layer stack on the first electrode, a charge carrier-generating layer stack on the first organic functional layer stack, a second organic functional layer stack on the charge carrier-generating layer stack, and a second electrode on the second organic functional layer stack, wherein the charge carrier-generating layer stack comprises at least one hole-transporting layer, at least one electron-transporting layer and at least one intermediate layer, and wherein the at least one intermediate layer comprises a naphthalocyanine derivative wherein the naphthalocyanine derivative comprises the formula A or B

where R 1 and R 2 , which are arranged in a meta-position with respect to one another, collectively form an aromatic ring system consisting of one, two or three rings, and M 1 is Cu, Ag, Zn, Co, Ni, Fe, Mn, Mg, Ca, Sr, Ba, Al, AlCl, SnO, HfO, ZrO, VO or TiO.

2. The device according to claim 1 , wherein the naphthalocyanine derivative contains a metal or a metal compound.

3. The device according to claim 2 , wherein the metal or the metal compound are selected from a group containing Cu, Ag, Zn, Co, Ni, Fe, Mn, Mg, Ca, Sr, Ba, Al, AlCl, SnO, HfO, ZrO, VO and TiO.

4. The device according to claim 1 , wherein the naphthalocyanine derivative is metal-free.

5. The device according to claim 1 , wherein the naphthalocyanine derivative comprises the formula B and wherein M 1 is Cu, Co, TiO, SnO or VO.

6. The device according to claim 1 , wherein the at least one intermediate layer has a thickness which is selected from a range comprising 1 nm to 50 nm.

7. The device according to claim 1 , wherein the at least one hole-transporting layer comprises a first hole-transporting layer and a second hole-transporting layer and the first hole-transporting layer is arranged on the at least one electron-transporting layer and the second hole-transporting layer is arranged on the first hole-transporting layer.

8. The device according to claim 7 , wherein the at least one intermediate layer is arranged between the at least one electron transporting layer and the first hole-transporting layer and/or between the first hole-transporting layer and the second hole-transporting layer.

9. The device according to claim 7 , wherein the at least one hole-transporting layer or the first and second hole-transporting layers are undoped or are p-doped independently of one another.

10. The device according to claim 1 , wherein the at least one electron-transporting layer is n-doped.

11. The device according to claim 1 , which is formed as an organic light-emitting diode.

12. A method for producing an organic light-emitting device by the method steps of

A) forming a first organic functional layer stack on a first electrode which is arranged on a substrate,

B) forming a charge carrier-generating layer stack on the first organic functional layer stack,

C) forming a second organic functional layer stack on the charge carrier-generating layer stack,

D) arranging a second electrode on the second organic functional layer stack,

wherein method step B) comprises the steps of:

B1) applying at least one electron-transporting layer on the first organic functional layer stack,

B2) applying a first hole-transporting layer on the electron-transporting layer, and

B3) applying an intermediate layer wherein the intermediate layer comprises a naphthalocyanine derivative, wherein the naphthalocyanine derivative comprises the formula A or B

where R 1 and R 2 , which are arranged in a meta-position with respect to one another, collectively form an aromatic ring system consisting of one, two or three rings, and M 1 is Cu, Ag, Zn, Co, Ni, Fe, Mn, Mg, Ca, Sr, Ba, Al, AlCl, SnO, HfO, ZrO, VO or TiO.

13. The method according to claim 12 , wherein the naphthalocyanine derivative is vapor-deposited or applied as a solution.