Organic light-emitting device and method for producing the organic light-emitting device
View Patent ↗An organic light-emitting device and a method for producing an organic light-emitting device are disclosed. In an embodiment, the OLED includes a substrate, a first electrode disposed on the substrate, at least one first organic functional layer stack disposed on the first electrode, the first organic functional layer stack configured to emit radiation in a first wavelength range, a second electrode disposed on the first organic functional layer stack and a filter layer arranged in a beam path of the first organic functional layer stack, wherein the first wavelength range comprises a low-energy sub-range and a high-energy sub-range and wherein the filter layer comprises an absorption range containing the low-energy or the high-energy sub-range of the first wavelength range.
1. An organic light-emitting device comprising:
a substrate;
a first electrode disposed on the substrate;
at least one first organic functional layer stack disposed on the first electrode, the first organic functional layer stack configured to emit radiation in a first wavelength range;
a second electrode disposed on the first organic functional layer stack; and
a filter layer arranged in a beam path of the first organic functional layer stack,
wherein the first wavelength range comprises a low-energy sub-range and a high-energy sub-range,
wherein the filter layer comprises an absorption range containing the low-energy sub-range or the high-energy sub-range of the first wavelength range, and
wherein the filter layer is arranged between the first electrode and the second electrode.
2. The device according to claim 1 , wherein the filter layer contains a material which is selected from the group consisting of metal-containing and metal-free tetraazaporphyrin derivatives (TAPs).
3. The device according to claim 2 , wherein the metal-containing tetraazaporphyrin derivatives are selected from the group consisting of CoTAP, NiTAP, CuTAP, MgTAP, TiOTAP, VOTAP, ZnTAP, AlTAP, FeTAP, SnOTAP and MnTAP.
4. The device according to claim 1 , wherein the filter layer has a thickness between 1 nm and 50 nm.
5. The device according to claim 1 , wherein the first wavelength range comprises a red spectral range.
6. The device according to claim 5 , wherein the absorption range of the filter layer contains the high-energy sub-range of the first wavelength range.
7. The device according to claim 1 , wherein the filter layer is arranged between the first electrode and the first organic functional layer stack.
8. The device according to claim 1 , further comprising:
a second organic functional layer stack configured to emit radiation in a second wavelength range, the second organic functional layer stack is disposed between the first electrode and the first organic functional layer stack; and
a charge carrier generation layer stack disposed between the second organic functional layer stack and the first organic functional layer stack.
9. The device according to claim 8 , wherein the charge carrier generation layer stack comprises at least one hole-transporting layer and an electron-transporting layer, and wherein the filter layer is arranged between the hole-transporting layer and the electron-transporting layer.
10. The device according to claim 8 , further comprising an outcoupling layer between the substrate and the first electrode.
11. The device according to claim 8 , wherein the second wavelength range comprises a low-energy sub-range and a high-energy sub-range, and wherein the absorption range of the filter layer contains the low-energy sub-range or the high-energy sub-range of the second wavelength range.
12. The device according to claim 11 , wherein the second wavelength range comprises a red spectral range.
13. The device according to claim 12 , wherein the absorption range of the filter layer contains the high-energy sub-range of the second wavelength range.