118724 20240319081014.0 doi 10.1016/j.dyepig.2022.110566 sideral 129980 ART-2022-129980 eng Royo Sánchez, R. Universidad de Zaragoza Pyranylidene/trifluoromethylbenzoic acid-based chromophores for dye-sensitized solar cells 2022 Access copy available to the general public Unrestricted The synthesis and photovoltaic study of five dyes based on 4H-pyranylidene moiety as donor moiety is reported. A thiophene unit conjugated with/without an ethynyl bond acts as the p-relay and benzoic acid as the anchor group with/without a trifluoromethyl group. Their electrochemical and optical properties are analyzed by using a joint experimental and theoretical approach. The presence of the trifluoromethyl group leads to an enhancement of the molar extinction coefficient, being slightly when a hexyl chain is introduced in the thiophene ring, but does not modify the oxidation potential. For the preparation of derived solar cells an antiaggregant is essential in all cases. The photovoltaic performance is sensitive to the structural modification of the dye: the CF3 group and the hexyl chain of the thiophene spacer were shown to improve the efficiency. The lack of a triple bond in the p-spacer involves a lower photovoltaic efficiency, and the trifluoromethyl group leads to a lower dye-load, but a decrease of the recombination processes. These results are in accordance with the electrochemistry impedance spectroscopy studies carried out. Moreover, the organic dyes have been also tested with a fluorescent lamp (indoor conditions), leading to an increase of the efficiency, reaching a 36% for the best dye. © 2022 The Authors info:eu-repo/grantAgreement/ES/DGA-FEDER/E47-20R info:eu-repo/grantAgreement/ES/MICINN/PID2019-104307GB-I00-AEI-10.13039-501100011033 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 4.5 2022 CHEMISTRY, APPLIED 18 / 72 = 0.25 2022 Q1 T1 MATERIALS SCIENCE, TEXTILES 3 / 25 = 0.12 2022 Q1 T1 ENGINEERING, CHEMICAL 40 / 141 = 0.284 2022 Q2 T1 0.683 2022 Chemical Engineering (miscellaneous) 2022 Q1 Process Chemistry and Technology 2022 Q2 8.3 2022 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Domínguez Celorrio, A. (orcid)0000-0001-8253-8741 Franco Ontaneda, S. Universidad de Zaragoza (orcid)0000-0001-9747-1789 Andreu Solano, R. Universidad de Zaragoza (orcid)0000-0002-3206-9868 Orduna, J. 2013 765 Universidad de Zaragoza Dpto. Química Orgánica Área Química Orgánica 206 (2022), 10566 [12 pp] Dyes pigm. Dyes and Pigments 0143-7208 3360211 http://zaguan.unizar.es/record/118724/files/texto_completo.pdf Versión publicada 2431167 http://zaguan.unizar.es/record/118724/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:118724 articulos driver 2024-03-18-15:24:45 ARTICLE