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Publication details

Document type
Journal articles

Document subtype
Full paper

Title
The role of ethanol-water solvent mixtures in N719 sensitization of electrodeposited ZnO nanorods

Participants in the publication
Daniel Siopa (Author)
Ricardo Nunes (Author)
Filomena Martins (Author)
Dep. Química e Bioquímica
 CQB
 M. Soledade C. S. Santos (Author)
Dep. Química e Bioquímica
 CQB
 Killian Lobato (Author)
Dep. Engenharia Geográfica, Geofísica e Energia
 IDL
 Anabela Gomes (Author)
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA
Summary
Water plays an important role in N719 sensitization of ZnO films for application as photoanodes in DSC devices. The role of water content in ethanolic N719 sensitization solutions was examined resorting to N719-solvent interaction studies based on Kamlet-Taft solvatochromic parameters. Results show that as the water content increases, solvent’s HBA ability decreases, hindering dye aggregation in solution and increasing the fraction of dye carboxylic groups available for anchorage onto the charged ZnO surface. The impact of dye-dye-solvent equilibria in solution on ZnO nanorod films sensitization and device behavior was evaluated. Devices assembled with films sensitized in N719 solutions containing equal parts of ethanol and water showed a twofold increase in short-circuit current densities when compared to those sensitized in ethanol only, despite exhibiting significantly less stained films. Data indicate that the presence of water in the sensitization solution reduces the amount of dye aggregates in solution and on the ZnO surface.

Date of Submisson/Request
2017-12-14
Date of Acceptance
2018-04-10
Date of Publication
2018-05-12

Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Where published
Journal of Solid State Electrochemistry

Publication Identifiers
ISSN - 1432-8488

Publisher
Springer Science and Business Media LLC

Volume
22
Number
9

Number of pages
9
Starting page
2779
Last page
2787

Document Identifiers
URL - http://dx.doi.org/10.1007/s10008-018-3985-0
DOI - https://doi.org/10.1007/s10008-018-3985-0

Rankings
SCIMAGO Q2 (2018) - 0.606 - Eletrochemistry
Web Of Science Q3 (2018) - 2.531 - electrochemistry
SCIMAGO Q2 (2018) - 0.606 - Materials Science ( miscelaneous)

Keywords
ZnO nanorods ZnO-based photoanodes sensitization Kamlet-Taft solvent parameters Solvent effect on N719 dye aggregation

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APA
Daniel Siopa, Ricardo Nunes, Filomena Martins, M. Soledade C. S. Santos, Killian Lobato, Anabela Gomes, (2018). The role of ethanol-water solvent mixtures in N719 sensitization of electrodeposited ZnO nanorods. Journal of Solid State Electrochemistry, 22, 2779-2787. ISSN 1432-8488. eISSN . http://dx.doi.org/10.1007/s10008-018-3985-0

IEEE
Daniel Siopa, Ricardo Nunes, Filomena Martins, M. Soledade C. S. Santos, Killian Lobato, Anabela Gomes, "The role of ethanol-water solvent mixtures in N719 sensitization of electrodeposited ZnO nanorods" in Journal of Solid State Electrochemistry, vol. 22, pp. 2779-2787, 2018. 10.1007/s10008-018-3985-0

BIBTEX
@article{35976, author = {Daniel Siopa and Ricardo Nunes and Filomena Martins and M. Soledade C. S. Santos and Killian Lobato and Anabela Gomes}, title = {The role of ethanol-water solvent mixtures in N719 sensitization of electrodeposited ZnO nanorods}, journal = {Journal of Solid State Electrochemistry}, year = 2018, pages = {2779-2787}, volume = 22 }