Photovoltaic cell
View Patent ↗A photovoltaic cell is described, having a photoactive layer ( 4 ) made of two molecular components, namely an electron donor and an electron acceptor, particularly a conjugated polymer component and a fullerene component, and having two metallic electrodes ( 2, 5 ) provided on both sides of the photoactive layer ( 4 ). In order to provide advantageous construction ratios, it is suggested that an electrically insulating transition layer ( 6 ), having a thickness of at most 5 nm, be provided between at least one electrode ( 5 ) and the photoactive layer ( 4 ).
1. A photovoltaic cell, comprising:
a first electrode;
a second electrode;
a photoactive layer between the first and second electrodes, the photoactive layer comprising:
a conjugated polymer component;
a fullerene component;
a first electrically insulating layer between the photoactive layer and the first electrode; and
a second electrically insulating layer between the photoactive layer and the second electrode.
2. The photovoltaic cell of claim 1 , wherein the first electrically insulating layer has a thickness of at most five nanometers.
3. The photovoltaic cell of claims 1 , wherein the first electrically insulating layer has a thickness of at most two nanometers.
4. The photovoltaic cell of claim 1 , wherein the first electrically insulating layer comprises an alkali halogenide.
5. The photovoltaic cell of claim 1 , wherein the first electrically insulating layer comprises lithium fluoride.
6. The photovoltaic cell of claim 1 , wherein, during use of the photovoltaic cell, the first electrode is an electron-collecting electrode.
7. The photovoltaic cell of claim 1 , wherein the second electrically insulating layer has a thickness of at most five nanometers.
8. The photovoltaic cell of claim 1 , wherein the second electrically insulating layer comprises an alkali halogenide.
9. The photovoltaic cell of claim 7 , wherein, during use of the photovoltaic cell, the second electrode is a hole-collecting electrode.
10. The photovoltaic cell of claim 9 , further comprising a smoothing layer between the photoactive layer and the second electrode.
11. The photovoltaic cell of claim 10 , wherein the second electrically insulating layer is between the smoothing layer and the second electrode.
12. The photovoltaic cell of claim 1 , wherein, during use of the photovoltaic cell, the first electrode is a hole-collecting electrode.
13. The photovoltaic cell of claim 12 , further comprising a smoothing layer between the photoactive layer and the first electrode.
14. The photovoltaic cell of claim 1 , further comprising a smoothing layer between the photoactive layer and the first electrode.
15. The photovoltaic cell of claim 14 , wherein the smoothing layer comprises PEDOT.
16. The photoactive cell of claim 1 , wherein the fullerene comprises functionalized fullerene PCBM.
17. A photovoltaic cell, comprising:
a first electrode;
a second electrode;
a photoactive layer between the first and second electrodes, the photoactive layer comprising:
an electron donor; and
an electron acceptor comprising a fullerene component;
a first layer comprising an alkali halogenide between the photoactive layer and the first electrode; and
a second layer comprising the alkali halogenide between the photoactive layer and the second electrode.
18. The photovoltaic cell of claim 17 , wherein the alkali halogenide comprises lithium fluoride.
19. The photovoltaic cell of claim 17 , wherein the first layer has a thickness of at most five nanometers.
20. The photovoltaic cell of claim 17 , wherein the first layer has a thickness of at most two nanometers.
21. The photovoltaic cell of claim 17 , wherein the electron donor comprises a conjugated polymer.
22. The photovoltaic cell of claim 21 , wherein the electron acceptor comprises a fullerene component.
23. A photovoltaic cell, comprising:
a first electrode;
a second electrode;
a photoactive layer between the first and second electrodes, the photoactive layer comprising:
an electron donor comprising a conjugated polymer; and
an electron acceptor;
a first layer comprising an alkali halogenide between the photoactive layer and the first electrode; and
a second layer comprising the alkali halogenide between the photoactive layer and the second electrode.
24. The photovoltaic cell of claim 23 , wherein the alkali halogenide comprises lithium fluoride.
25. The photovoltaic cell of claim 23 , wherein the first layer has a thickness of at most five nanometers.
26. The photovoltaic cell of claim 23 , wherein the first layer has a thickness of at most two nanometers.
27. The photovoltaic cell of claim 23 , wherein the electron acceptor comprises a fullerene component.