Título: Dyes and PigmentsImportada do Authenticus Pesquisar Publicações da Revista

Vol. 136

Páginas: 46-53

ISSN: 0143-7208

Editora: Elsevier

ISI Web of Knowledge - 23 Citações

ISI Web of Science

Scopus - 27 Citações

CORDIS: Ciências Físicas > Química > Química orgânica

FOS: Ciências exactas e naturais > Química

ID Authenticus: P-00K-RWP

DOI: 10.1016/j.dyepig.2016.08.020

Resumo (PT):

Abstract (EN): Four novel heterocycle dyes 3a-d were synthesized in order to study the variations produced in the optical, electronic and photovoltaic properties by substitution of different electron-rich heterocyclic groups 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 on a thieno[3,2-b]thiophene spacer, a cyanoacetic acid anchoring group and several electron-rich heterocycles (thiophene, pyrrole and furan) as donor groups. The multidisciplinary study concerning the optical, redox and photovoltaic characterization of the dyes reveals that compound 3b bearing a hexyl-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 between N719 and 3b revealed that upon addition of N719 co-adsorbent, the optimized cell efficiencies were improved 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

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Notas: Journal Citation Reports

Nº de páginas: 8