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Issue 11, 2011
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Assembly of carbon nanotubes and alkylated fullerenes: nanocarbon hybrid towards photovoltaic applications

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Abstract

Taking advantage of the non-covalent interaction between alkyl chains and the sidewalls of a single-walled carbon nanotube (SWCNT), a nanocarbon hybrid of SWCNT and a fullerene (C60) derivative with long alkyl chains was constructed as a donor–acceptor pair for photovoltaics and nanodevice investigations. It was found that SWCNT could be mostly unbundled by the alkylated C60 (1) and was well-dispersed in organic solvents. As a photoactive material, the resultant nanocarbon hybrid, 1-SWCNT, performed well in light-energy harvesting applications in photoelectrochemical cells and nanoscale field-effect transistors (FET). Moreover, the 1-SWCNT assembly exhibited superhydrophobicity, providing an interesting opportunity to fabricate nanocarbon-based waterproof optoelectronic devices. In order to understand the photoexcitation process, the 1-SWCNT assembly was electrochemically and spectroscopically characterized. The electrochemical results showed that the SWCNT facilitated electronic communication between 1 and the electrode. The steady-state and time-resolved fluorescence and the photoluminescence excitation studies suggested efficient quenching of the singlet excited state of C60. Nanosecond transient absorption data revealed the one-electron reduction of fullerene, C60˙, thereby demonstrating the photoinduced electron transfer from SWCNT to the C60 unit in the 1-SWCNT assembly.

Graphical abstract: Assembly of carbon nanotubes and alkylated fullerenes: nanocarbon hybrid towards photovoltaic applications

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Publication details

The article was received on 13 Jun 2011, accepted on 28 Jul 2011 and first published on 25 Aug 2011


Article type: Edge Article
DOI: 10.1039/C1SC00360G
Citation: Chem. Sci., 2011,2, 2243-2250
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    Assembly of carbon nanotubes and alkylated fullerenes: nanocarbon hybrid towards photovoltaic applications

    Y. Shen, J. S. Reparaz, M. R. Wagner, A. Hoffmann, C. Thomsen, J. Lee, S. Heeg, B. Hatting, S. Reich, A. Saeki, S. Seki, K. Yoshida, S. S. Babu, H. Möhwald and T. Nakanishi, Chem. Sci., 2011, 2, 2243
    DOI: 10.1039/C1SC00360G

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