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US 9,755,150 B2Granted
Functionalized nanostructures and related devices
AssigneeMassachussets Institute of Technology
InventorsTimothy M. Swager, Vladimir Bulovic, Ggoch Ddeul Han, Trisha L. Andrew
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Abstract
Embodiments described herein provide functionalized carbon nanostructures for use in various devices, including photovoltaic devices (e.g., solar cells). In some embodiments, carbon nanostructures substituted with at least one cyclobutyl and/or cyclobutenyl group are provided. Devices including such materials may exhibit increased efficiency, increased open circuit potential, high electron/hole mobility, and/or low electrical resistance.
Claims22
A device, comprising:
- a composition comprising a carbon nanostructure comprising at least one cyclobutyl and/or at least one cyclobutenyl group, any of which is optionally substituted;
- and
- at least one electrode in electrochemical communication with the composition,
- wherein the composition exhibits an increase in LUMO energy level of about 50 meV relative to the LUMO energy level of ([6,6]-phenyl-C61-butyric acid methyl ester) (PCBM).
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A photovoltaic device, comprising:
- a photoactive material comprising an electron donor material and an electron acceptor material comprising a carbon nanostructure and a cyclobutyl-containing group and/or a cyclobutenyl-containing group in contact with the electron donor material;
- and
- at least two electrodes in electrical communication with the photoactive material,
- the electron acceptor material exhibits an increase in LUMO energy level of about 50 meV relative to the LUMO energy level of ([6,6]-phenyl-C61-butyric acid methyl ester) (PCBM).
1 more element
Dependencies are inferred from the claim text.