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Functionalization of boron-doped nanocrystalline diamond with N3 dye molecules
Hasselt University, Diepenbeek, Belgium.
Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, The Institute of Technology.
Hasselt University, Diepenbeek, Belgium.
University of Ulm, Germany .
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2014 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 6, no 13, 10322-10329 p.Article in journal (Refereed) Published
Abstract [en]

N3 dye molecules [cis-bis(isothiocyanato)bis(2,2-bipyridyl-4,4-dicarboxylato)ruthenium(II)] are covalently attached to boron-doped nanocrystalline diamond (B:NCD) thin films through a combination of coupling chemistries, i.e., diazonium, Suzuki, and EDC-NHS. X-ray and ultraviolet photoelectron spectroscopy and near-edge X-ray absorption fine structure spectroscopy are used to verify the covalent bonding of the dye on the B:NCD surface (compared to a hydrogen-terminated reference). The spectroscopic results confirm the presence of a dense N3 chromophore layer, and the positions of the frontier orbitals of the dye relative to the band edge of the B:NCD thin film are inferred as well. Proof-of-concept photoelectrochemical measurements show a strong increase in the photocurrent compared to non-dye-functionalized B:NCD films. This study opens up the possibility of applying N3-sensitized B:NCD thin films as hole conductors in dye-sensitized solar cells.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2014. Vol. 6, no 13, 10322-10329 p.
Keyword [en]
boron-doped diamond; diazonium coupling; Suzuki cross-coupling; N3 dye; spectroscopic surface characterization; photocurrent
National Category
Physical Sciences
URN: urn:nbn:se:liu:diva-109373DOI: 10.1021/am501783bISI: 000338979900049PubMedID: 24915549OAI: diva2:738059
Available from: 2014-08-15 Created: 2014-08-15 Last updated: 2015-05-13Bibliographically approved

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