Light emitting device with a layer sequence having electrode surfaces and partial regions
View Patent ↗A radiation emitting device includes a substrate and a layer sequence disposed on top of the substrate. The layer sequence includes a first electrode surface with a first contact for applying a voltage, at least one functional layer that emits radiation during operation, and a second electrode surface. In the layer sequence, a plurality of partial regions is present that is modified in such a way that the emission of radiation visible to an external observer therefrom is interrupted. The distribution density of these partial regions can vary depending on their distance from the contact.
1. A light emitting device, comprising:
a substrate; and
a layer sequence disposed on the substrate, the layer sequence comprising:
a first electrode surface on the substrate with a first contact and a second contact;
at least one functional layer, which emits light during operation;
a second electrode surface on the at least one functional layer, wherein the second electrode surface comprises a third contact and a fourth contact; and
a plurality of partial regions in the layer sequence, wherein the layer sequence is modified by the partial regions in such a way that the emission of light visible to an outside observer is interrupted, wherein a distribution density of each partial region varies depending on a distance of that partial region from the first contact; and
electrically conducting conductive paths that are arranged in the partial regions and that, emanating from the first contact and/or the second contact and/or the third contact and/or the fourth contact, extend across the first and/or second electrode surface;
wherein adjacent conductive paths comprise different lengths, and a length distribution of the conductive paths emanating from the first and/or second contact and/or the third and fourth contact, in each case, comprises at least one maximum and one minimum; and
wherein the maxima and minima of the length distribution of the conductive paths emanating from the first and second contact and/or from the third and fourth contact are located opposite each other.
2. The light emitting device according to claim 1 , wherein the conductive paths extend away from the first contact and/or a third contact across the first and/or second electrode surface.
3. The light emitting device according to claim 1 , wherein surfaces of the conductive paths comprise an electrically insulating layer that is adjacent to the second electrode surface and to an organic functional layer.
4. The light emitting device according to claim 2 , wherein the distribution density of the conductive paths decreases with increasing distance from the first contact and/or third contact.
5. The light emitting device according to claim 1 , wherein a width of the conductive paths is less than 200 μm.
6. The light emitting device according to claim 1 , wherein the conductive paths have a thickness in a range of less than 200 μm.
7. The light emitting device according to claim 1 , wherein the conductive paths pierce the second and/or the first electrode surface.
8. The light emitting device according to claim 7 , wherein surfaces of the conductive paths comprise an insulating layer that is adjacent to an organic functional layer and the second or first electrode surface.
9. The light emitting device according to claim 1 , wherein the distribution density of the conductive paths decreases with increasing distance from the first and second contact and/or the third and fourth contact, and the conductive paths emanating from the first and second contact and/or from the third and fourth contact do not intersect.
10. The light emitting device according to claim 1 , wherein a thickness and/or width of the conductive paths decreases with increasing distance from the first contact and/or from the third contact.
11. A light emitting device, comprising:
a substrate; and
a layer sequence disposed on the substrate, the layer sequence comprising:
a first electrode surface on the substrate with a first contact and a second contact;
at least one functional layer, which emits light during operation;
a second electrode surface on the at least one functional layer, wherein the second electrode surface comprises a third contact and a fourth contact; and
a plurality of partial regions in the layer sequence, wherein the layer sequence is modified by the partial regions in such a way that the emission of light visible to an outside observer is interrupted, wherein a distribution density of each partial region varies depending on a distance of that partial region from the first contact; and
electrically conducting conductive paths that are arranged in the partial regions and that, emanating from the first contact and/or the second contact and/or the third contact and/or the fourth contact, extend across the first and/or second electrode surface;
wherein adjacent conductive paths comprise different lengths, and a length distribution of the conductive paths emanating from the first and/or second contact and/or the third and fourth contact, in each case, comprises at least one maximum and one minimum; and
wherein the maxima and minima of the length distribution of the conductive paths originating from the first and second contact and/or from the third and fourth contact are shifted relative to each other.
12. The light emitting device according to claim 11 , wherein the conductive paths extend away from the first contact and/or a third contact across the first and/or second electrode surface.
13. The light emitting device according to claim 11 , wherein surfaces of the conductive paths comprise an electrically insulating layer that is adjacent to the second electrode surface and to an organic functional layer.
14. The light emitting device according to claim 12 , wherein the distribution density of the conductive paths decreases with increasing distance from the first contact and/or third contact.
15. The light emitting device according to claim 11 , wherein a width of the conductive paths is less than 200 μm.
16. The light emitting device according to claim 11 , wherein the conductive paths have a thickness in a range of less than 200 μm.
17. The light emitting device according to claim 11 , wherein the conductive paths pierce the second and/or the first electrode surface.
18. The light emitting device according to claim 17 , wherein surfaces of the conductive paths comprise an insulating layer that is adjacent to an organic functional layer and the second or first electrode surface.
19. The light emitting device according to claim 11 , wherein the distribution density of the conductive paths decreases with increasing distance from the first and second contact and/or the third and fourth contact, and the conductive paths emanating from the first and second contact and/or from the third and fourth contact do not intersect.
20. The light emitting device according to claim 11 , wherein a thickness and/or width of the conductive paths decreases with increasing distance from the first contact and/or from the third contact.