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http://hdl.handle.net/1942/33191
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DC Field | Value | Language |
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dc.contributor.author | RAYMAKERS, Jorne | - |
dc.contributor.author | Artemenko, A | - |
dc.contributor.author | VERSTRAETEN, Frederik | - |
dc.contributor.author | Krysova, H | - |
dc.contributor.author | Cermak, J | - |
dc.contributor.author | NICLEY, Shannon | - |
dc.contributor.author | Lopez-Carballeira, D | - |
dc.contributor.author | Kromka, A | - |
dc.contributor.author | HAENEN, Ken | - |
dc.contributor.author | Kavan, L | - |
dc.contributor.author | MAES, Wouter | - |
dc.contributor.author | Rezek, B | - |
dc.date.accessioned | 2021-01-27T14:21:26Z | - |
dc.date.available | 2021-01-27T14:21:26Z | - |
dc.date.issued | 2020 | - |
dc.date.submitted | 2021-01-27T14:11:06Z | - |
dc.identifier.citation | ELECTROCHIMICA ACTA, 337 (Art N° 135762) | - |
dc.identifier.uri | http://hdl.handle.net/1942/33191 | - |
dc.description.abstract | Encouraged by its rich surface chemistry and excellent electrochemical properties, boron-doped nanocrystalline diamond (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. However, this method typically leads to multilayers that may complicate the transport of photogenerated charges. 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 angular resolved X-ray photoelectron spectroscopy, 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 cross-coupling reactions. Homogenous surface coverage is achieved even on the B:NCD electrode. Atomic scale DFT computing reveals that for the chromophore with the strongest acceptor unit, efficient charge separation of 20 angstrom is obtained where photogenerated holes move directly into diamond. Yet, photocurrent and photovoltage measurements suggest competitive electron recombination to the diamond electrode via the redox electrolyte. 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. (C) 2020 Elsevier Ltd. All rights reserved. | - |
dc.description.sponsorship | The authors thank UHasselt, the Research FoundationeFlanders (FWO Vlaanderen), and the European regional development fund project CZ.02.1.01/0.0/0.0/15_003/0000464 (CAP) for financial support. H.K. and L.K. acknowledge the financial support from the Ministry of Education, Youth and Sports of the Czech Republic project Pro-NanoEnviCz (Reg. No. CZ.02.1.01/0.0/0.0/16_013/0001821). Part of this work has been done using computational resources of the“Research Center for Informatics” supported by the EU (reg. no. CZ.02.1.01/0.0/0.0/16_019/0000765). This work was also supported by The Ministry of Education, Youth and Sports through the Large Research Infrastructures IT4Innovations and LNSM. J. Raymakers and F. Verstraeten thank the FWO for their PhD fellowships. | - |
dc.language.iso | en | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.rights | 2020 Elsevier Ltd. All rights reserved | - |
dc.subject.other | Boron-doped diamond | - |
dc.subject.other | Surface functionalization | - |
dc.subject.other | Sonogashira cross-coupling | - |
dc.subject.other | Monolayers | - |
dc.subject.other | Photoelectrochemistry | - |
dc.title | Photogenerated charge collection on diamond electrodes with covalently linked chromophore monolayers | - |
dc.type | Journal Contribution | - |
dc.identifier.volume | 337 | - |
local.bibliographicCitation.jcat | A1 | - |
local.publisher.place | THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND | - |
local.type.refereed | Refereed | - |
local.type.specified | Article | - |
local.bibliographicCitation.artnr | 135762 | - |
dc.identifier.doi | 10.1016/j.electacta.2020.135762 | - |
dc.identifier.isi | WOS:000521531700059 | - |
local.provider.type | Web of Science | - |
local.uhasselt.international | yes | - |
item.validation | ecoom 2021 | - |
item.fulltext | With Fulltext | - |
item.accessRights | Open Access | - |
item.fullcitation | RAYMAKERS, Jorne; Artemenko, A; VERSTRAETEN, Frederik; Krysova, H; Cermak, J; NICLEY, Shannon; Lopez-Carballeira, D; Kromka, A; HAENEN, Ken; Kavan, L; MAES, Wouter & Rezek, B (2020) Photogenerated charge collection on diamond electrodes with covalently linked chromophore monolayers. In: ELECTROCHIMICA ACTA, 337 (Art N° 135762). | - |
item.contributor | RAYMAKERS, Jorne | - |
item.contributor | Artemenko, A | - |
item.contributor | VERSTRAETEN, Frederik | - |
item.contributor | Krysova, H | - |
item.contributor | Cermak, J | - |
item.contributor | NICLEY, Shannon | - |
item.contributor | Lopez-Carballeira, D | - |
item.contributor | Kromka, A | - |
item.contributor | HAENEN, Ken | - |
item.contributor | Kavan, L | - |
item.contributor | MAES, Wouter | - |
item.contributor | Rezek, B | - |
crisitem.journal.issn | 0013-4686 | - |
crisitem.journal.eissn | 1873-3859 | - |
Appears in Collections: | Research publications |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Manuscript - Raymakers et al.pdf | Peer-reviewed author version | 1.33 MB | Adobe PDF | View/Open |
1-s2.0-S0013468620301547-main.pdf Restricted Access | Published version | 1.7 MB | Adobe PDF | View/Open Request a copy |
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