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Author(s): Sara S. M. Fernandes
M. Cidália R. Castro
I. Mesquita
L. Andrade
A. Mendes
M. Manuela M. Raposo
Title: Synthesis 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
Issue Date: 2017
Abstract: Four 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
Subject: Química orgânica, Química
Organiz chemistry, Chemical sciences
Scientific areas: Ciências exactas e naturais::Química
Natural sciences::Chemical sciences
Related Information: info:eu-repo/grantAgreement/COMISSÃO EUROPEIA/7.º Programa-Quadro de IDT/321315/Building Integrated Dye Sensitized Solar Cells/BI-DSC
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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