Donor-free oligothiophene based dyes with di-anchor architecture for dye-sensitized solar cells

dos Santos, J. M., Tanaka, E., Wiles, A. A. , Cooke, G. and Robertson, N. (2021) Donor-free oligothiophene based dyes with di-anchor architecture for dye-sensitized solar cells. Molecular Systems Design and Engineering, 6(5), pp. 381-389. (doi: 10.1039/D1ME00009H)

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Traditionally, metal free DSSCs are fabricated from sensitizers designed using a donor-pi-acceptor (D-π-A) architecture. More recently, non-conventional dyes without strong donor units have emerged and have provided competitive power conversion efficiencies (PCEs) with respect to their (D-π-A)-based counterparts. Here, we report the synthesis and DSSC fabrication of oligothiophene molecules featuring two anchoring groups that do not possess strong donor moieties and are able to adopt V- and U-shape conformations. PCEs of 3.70% was obtained with the smaller 5-thiophene dyes (5T2A, 5T2A-E) possessing higher PCEs than their larger 8-thiophene counterparts containing diacetylene units (8T4A, 8T4A-E). Comparison to the DSSC properties of the analogous linear dye 5T, indicates that the architecture and structure of this series of dyes are likely responsible for their lower performance.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Cooke, Professor Graeme and Wiles, Dr Alan and Dos Santos, Mr John Marques
Authors: dos Santos, J. M., Tanaka, E., Wiles, A. A., Cooke, G., and Robertson, N.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Molecular Systems Design and Engineering
Publisher:Royal Society of Chemistry
ISSN (Online):2058-9689
Published Online:17 March 2021
Copyright Holders:Copyright © 2021 The Royal Society of Chemistry
First Published:First published in Molecular Systems Design and Engineering 6(5): 381-389
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
141731Physical organic chemistry - opportunities in synthesis, materials and pharmaceuticalsGraeme CookeEngineering and Physical Sciences Research Council (EPSRC)EP/E036244/1Chemistry