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Rapid Microwave-Assisted Self-Assembly of a Carboxylic-Acid-Terminated Dye on a TiO2 Photoanode
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry. Imperial Coll London, Dept Chem, London SW7 2AZ, England.
KTH Royal Inst Technol, Dept Chem, Div Appl Phys Chem, SE-11428 Stockholm, Sweden.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.ORCID iD: 0000-0002-8249-1469
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2018 (English)In: ACS APPLIED ENERGY MATERIALS, ISSN 2574-0962, Vol. 1, no 1, p. 202-210Article in journal (Refereed) Published
Abstract [en]

Self-assembly of carboxylic-acid-functionalized dyes on mesoporous, anatase TiO2 is at the heart of dye-sensitized solar cells (DSSCs). However, the process often requires 6-20 h of electrode immersion at room temperature in the dye-bath solutions. Here, we introduce a new, rapid microwave-assisted sensitization technique (MINAS), which significantly accelerates the sensitization process and yields high-quality, self-assembled films of an organic dye within 5 min. Targeted experiments show that the effects of the microwave radiation cannot be explained purely on the basis of the thermal component. The interaction of the microwave radiation with the conductive fluorine-doped tin oxide (FTO) electrical contact is a key aspect to consider and a unique feature of MWAS that is the likely cause for producing rapid self-assembly of the dye on the surface.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2018. Vol. 1, no 1, p. 202-210
Keywords [en]
dye-sensitized solar cells, sensitization, dye absorption, microwave, self-assembly, TiO2 grafting
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-377988DOI: 10.1021/acsaem.7b00088ISI: 000458705000028OAI: oai:DiVA.org:uu-377988DiVA, id: diva2:1293385
Funder
Swedish Research CouncilSwedish Energy AgencyKnut and Alice Wallenberg FoundationCarl Tryggers foundation Available from: 2019-03-04 Created: 2019-03-04 Last updated: 2019-03-04Bibliographically approved

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Leandri, ValentinaYang, WenxingBoschloo, GerritOtt, Sascha

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Molecular BiomimeticsPhysical ChemistryDepartment of Chemistry - Ångström
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