Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/103197
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dc.creatorSara S. M. Fernandes
dc.creatorM. Cidália R. Castro
dc.creatorI. Mesquita
dc.creatorL. Andrade
dc.creatorA. Mendes
dc.creatorM. Manuela M. Raposo
dc.date.accessioned2019-08-12T23:08:28Z-
dc.date.available2019-08-12T23:08:28Z-
dc.date.issued2017
dc.identifier.issn0143-7208
dc.identifier.othersigarra:175205
dc.identifier.urihttps://hdl.handle.net/10216/103197-
dc.description.abstractFour novel heterocycle dyes 3a-d were synthesized in order to study the variations produced in theoptical, electronic and photovoltaic properties by substitution of different electron-rich heterocyclicgroups to the thieno[3,2-b]thiophene system. The final push-pull conjugated dyes 3a-d were synthesized by Suzuki-Miyaura coupling reaction followed by Knoevenagel condensation of the corresponding aldehyde precursors with cyanoacrylic acid 2a-d. These new push-pull systems are based ona thieno[3,2-b]thiophene spacer, a cyanoacetic acid anchoring group and several electron-richheterocycles (thiophene, pyrrole and furan) as donor groups. The multidisciplinary study concerningthe optical, redox and photovoltaic characterization of the dyes reveals that compound 3b bearing ahexyl-bithiophene donor group/heterocyclic spacer exhibits the best overall conversion efficiency(2.49%) as sensitizer in nanocrystalline TiO2 dye sensitized solar cells. Co-adsorption studies betweenN719 and 3b revealed that upon addition of N719 co-adsorbent, the optimized cell efficiencies wereimproved by 16e77%. The best efficiency was 4.40%, corresponding to 54% of the photovoltaic performance of the N719-based DSSC fabricated and measured under similar conditions
dc.language.isoeng
dc.relationinfo:eu-repo/grantAgreement/COMISSÃO EUROPEIA/7.º Programa-Quadro de IDT/321315/Building Integrated Dye Sensitized Solar Cells/BI-DSC
dc.rightsrestrictedAccess
dc.subjectQuímica orgânica, Química
dc.subjectOrganiz chemistry, Chemical sciences
dc.titleSynthesis and characterization of novel thieno[3,2-b]thiophene based metal-free organic dyes with different heteroaromatic donor moieties as sensitizers for dye-sensitized solar cells
dc.typeArtigo em Revista Científica Internacional
dc.contributor.uportoFaculdade de Engenharia
dc.identifier.doi10.1016/j.dyepig.2016.08.020
dc.subject.fosCiências exactas e naturais::Química
dc.subject.fosNatural sciences::Chemical sciences
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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