Voltage-operated layered arrangement
View Patent ↗A voltage-operated layered arrangement comprising a substrate ( 1 ), a layered structure ( 2, 3, 4, 5 ) that is applied to the substrate and that comprises at least one electrically conductive functional layer ( 3 ) arranged between a first electrode ( 2 ) and a second electrode ( 4 ), and a field-degrading layer ( 5 ) that is less electrically conductive than the functional layer ( 3 ) and that is applied to the second electrode ( 4 ) arranged on the side of the layered structure remote from the substrate in such a way that it covers the second electrode ( 4 ) at least in the region of an edge ( 4 a ) and connects the second electrode ( 4 ) to the first electrode ( 2 ) electrically.
1. A voltage-operated layered arrangement comprising
a substrate ( 1 ),
a layered structure ( 2 , 3 , 4 , 5 ) that is applied to the substrate and that comprises at least one electrically conductive functional layer ( 3 ) arranged between a first electrode ( 2 ) and a second electrode ( 4 ), and
a field-degrading layer ( 5 ) that is less electrically conductive than the functional layer ( 3 ) and that is applied to the second electrode ( 4 ) arranged on the side of the layered structure remote from the substrate in such a way that it covers the second electrode ( 4 ) at least in the region of an edge ( 4 a ) and connects the second electrode ( 4 ) to the first electrode ( 2 ) electrically.
2. A voltage-operated layered arrangement as claimed in claim 1 , wherein the functional layer comprises at least one electroluminescent layer.
3. A voltage-operated layered arrangement as claimed in claim 2 , wherein the electroluminescent layer comprises an organic electroluminescent material.
4. A voltage-operated layered arrangement as claimed in claim 1 , wherein the field-degrading layer has an electrical resistance of between 1 Ωcm and 10 8 Ωcm.
5. A voltage-operated layered arrangement as claimed in claim 1 , wherein the thickness of the field-degrading layer is less than 200 nm.
6. A voltage-operated layered arrangement as claimed in claim 4 , wherein the field-degrading layer comprises at least one material selected from the group consisting of: the inorganic semiconductors, the organic conductive polymers and the small conductive organic molecules.
7. A voltage-operated layered arrangement as claimed in claim 6 , wherein the inorganic semiconductor is sub-stoichiometric SiN x where 0.1<x<0.8, titanium oxinitride, or non-stoichiometric TiO y where 0<y<2.
8. A voltage-operated layered arrangement as claimed in claim 6 , wherein the organic conductive polymers are doped PDOT, PANI or polyaniline.
9. A voltage-operated layered arrangement as claimed in claim 6 , wherein the small conductive organic molecules comprise at least one material selected from the group consisting of: MTDATA doped with F4TCNQ, vanadyl phthalocyanine doped with F4TCNQ, C60 fullerene doped with LVC and C60 fullerene doped with pyB.
10. A method of producing a voltage-operated layered arrangement as claimed in claim 1 , comprising the steps of
applying a first electrode ( 2 ),
applying an electrically conductive functional layer ( 3 ),
applying a second electrode ( 4 ),
applying a field-degrading layer ( 5 ) to cover the second electrode ( 4 ) at least in the region of an edge ( 4 a ) and to make electrical contact with the first electrode ( 2 ).