Functionalization of boron-doped nanocrystalline diamond with N3 dye molecules
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
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.
boron-doped diamond; diazonium coupling; Suzuki cross-coupling; N3 dye; spectroscopic surface characterization; photocurrent
IdentifiersURN: urn:nbn:se:liu:diva-109373DOI: 10.1021/am501783bISI: 000338979900049PubMedID: 24915549OAI: oai:DiVA.org:liu-109373DiVA: diva2:738059