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Control of the distance between porphyrin sensitizers and the TiO2 surface in solar cells by designed anchoring groups

Carlos J.P. Monteiro, Patricia Jesus, Matthew Davies Orcid Logo, Diana Ferreira, Luis G. Arnaut, Iluminada Gallardo, Mariette M. Pereira, Carlos Serpa

Journal of Molecular Structure, Volume: 1196, Pages: 444 - 454

Swansea University Author: Matthew Davies Orcid Logo

Abstract

Unsymmetrical porphyrins were rationally-designed and synthesized to investigate the relation between their structure, properties and adsorption geometries, and their relative performance as dyes in dye-sensitized solar cells. Photophysics, electrochemical and TiO2 anchoring properties of the new un...

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Published in: Journal of Molecular Structure
ISSN: 0022-2860
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa51065
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first_indexed 2019-07-11T15:37:41Z
last_indexed 2019-08-09T16:31:10Z
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spelling 2019-08-08T08:58:47.9579658 v2 51065 2019-07-11 Control of the distance between porphyrin sensitizers and the TiO2 surface in solar cells by designed anchoring groups 4ad478e342120ca3434657eb13527636 0000-0003-2595-5121 Matthew Davies Matthew Davies true false 2019-07-11 CHEG Unsymmetrical porphyrins were rationally-designed and synthesized to investigate the relation between their structure, properties and adsorption geometries, and their relative performance as dyes in dye-sensitized solar cells. Photophysics, electrochemical and TiO2 anchoring properties of the new unsymmetrical N-glycolic acid amino phenyl porphyrins were evaluated. Most dyes showed good energy matching between excited state energies and the TiO2 conduction band. Depending on the porphyrins, anchoring to TiO2 occurred with only one carboxyl anchor group or with two N-glycolic acid amino phenyl connected to opposite and adjacent phenyl groups. It was found that cell efficiencies normalized for surface coverage are strongly affected by the adsorption geometry and spacer linker flexibility. The effective distance between the porphyrin core and the TiO2 surface has key importance in cell efficiencies. The data is consistent with a through-space electron transfer and anchoring via N-glycolic acid substituents located in adjacent phenyl groups results in higher surface coverage normalized cell efficiencies. Journal Article Journal of Molecular Structure 1196 444 454 0022-2860 Dye-sensitized solar cells, Porphyrin sensitizers, Anchoring mode, Adjacent anchor groups, Molecular efficiencies 15 11 2019 2019-11-15 10.1016/j.molstruc.2019.06.074 COLLEGE NANME Chemical Engineering COLLEGE CODE CHEG Swansea University 2019-08-08T08:58:47.9579658 2019-07-11T09:32:11.7287244 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Carlos J.P. Monteiro 1 Patricia Jesus 2 Matthew Davies 0000-0003-2595-5121 3 Diana Ferreira 4 Luis G. Arnaut 5 Iluminada Gallardo 6 Mariette M. Pereira 7 Carlos Serpa 8 0051065-08082019085208.pdf monteiro2019.pdf 2019-08-08T08:52:08.9970000 Output 1113366 application/pdf Accepted Manuscript true 2020-06-27T00:00:00.0000000 true eng
title Control of the distance between porphyrin sensitizers and the TiO2 surface in solar cells by designed anchoring groups
spellingShingle Control of the distance between porphyrin sensitizers and the TiO2 surface in solar cells by designed anchoring groups
Matthew Davies
title_short Control of the distance between porphyrin sensitizers and the TiO2 surface in solar cells by designed anchoring groups
title_full Control of the distance between porphyrin sensitizers and the TiO2 surface in solar cells by designed anchoring groups
title_fullStr Control of the distance between porphyrin sensitizers and the TiO2 surface in solar cells by designed anchoring groups
title_full_unstemmed Control of the distance between porphyrin sensitizers and the TiO2 surface in solar cells by designed anchoring groups
title_sort Control of the distance between porphyrin sensitizers and the TiO2 surface in solar cells by designed anchoring groups
author_id_str_mv 4ad478e342120ca3434657eb13527636
author_id_fullname_str_mv 4ad478e342120ca3434657eb13527636_***_Matthew Davies
author Matthew Davies
author2 Carlos J.P. Monteiro
Patricia Jesus
Matthew Davies
Diana Ferreira
Luis G. Arnaut
Iluminada Gallardo
Mariette M. Pereira
Carlos Serpa
format Journal article
container_title Journal of Molecular Structure
container_volume 1196
container_start_page 444
publishDate 2019
institution Swansea University
issn 0022-2860
doi_str_mv 10.1016/j.molstruc.2019.06.074
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Chemical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemical Engineering
document_store_str 1
active_str 0
description Unsymmetrical porphyrins were rationally-designed and synthesized to investigate the relation between their structure, properties and adsorption geometries, and their relative performance as dyes in dye-sensitized solar cells. Photophysics, electrochemical and TiO2 anchoring properties of the new unsymmetrical N-glycolic acid amino phenyl porphyrins were evaluated. Most dyes showed good energy matching between excited state energies and the TiO2 conduction band. Depending on the porphyrins, anchoring to TiO2 occurred with only one carboxyl anchor group or with two N-glycolic acid amino phenyl connected to opposite and adjacent phenyl groups. It was found that cell efficiencies normalized for surface coverage are strongly affected by the adsorption geometry and spacer linker flexibility. The effective distance between the porphyrin core and the TiO2 surface has key importance in cell efficiencies. The data is consistent with a through-space electron transfer and anchoring via N-glycolic acid substituents located in adjacent phenyl groups results in higher surface coverage normalized cell efficiencies.
published_date 2019-11-15T03:56:34Z
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score 10.92735