Photogenerated charge collection on diamond electrodes with covalently linked chromophore monolayers

0524953 - FZÚ 2021 RIV GB eng J - Článek v odborném periodiku
Raymakers, J. - Artemenko, Anna - Verstraeten, F. - Krýsová, Hana - Čermák, Jan - Nicley, S. S. - Lopez-Carballeira, D. - Kromka, Alexander - Haenen, K. - Kavan, Ladislav - Maes, W. - Rezek, B.
Photogenerated charge collection on diamond electrodes with covalently linked chromophore monolayers.
Electrochimica acta. Roč. 337, Mar (2020), s. 1-15, č. článku 135762. ISSN 0013-4686. E-ISSN 1873-3859
Grant CEP: GA MŠMT LM2015087; GA MŠMT(CZ) EF16_013/0001821
Institucionální podpora: RVO:68378271 ; RVO:61388955
Klíčová slova: surface functionalization * sonogashira cross-coupling * monolayers * photoelectrochemistry
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.); Physical chemistry (UFCH-W)
Impakt faktor: 6.901, rok: 2020
Způsob publikování: Omezený přístup
https://doi.org/10.1016/j.electacta.2020.135762

B:NCD is a promising p-type photoelectrode in dye-sensitized solar cells. One method of diamond surface functionalization using stable carbon-carbon bonds involves the electrochemical grafting of diazonium salts. Here, we establish functionalization of B:NCD electrodes by a monolayer of ethynylphenyl molecules using sterically hindered 4 (trimethylsilyl)ethynylbenzenediazonium tetrafluoroborate. Both the density and structural orientation of the grafted layer are investigated by ARXPS, confirming the presence of covalently grafted monolayers. After removal of the trimethylsilyl protective groups, the resulting ethynyl functionalities are employed to immobilize organic donor-acceptor chromophores via Sonogashira crosscoupling reactions. Correlation between the density of the molecular layer and photocurrents/photovoltage provides better understanding of the charge generation and recombination pathways in diamond-organic photoelectrochemical cells.
Trvalý link: http://hdl.handle.net/11104/0309169