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

• Type: Article in International Scientific Journal
• Date: 2017

Authors

Sara S. M. Fernandes (Author) Other; M. Cidália R. Castro (Author) Other; I. Mesquita (Author) FEUP; L. Andrade (Author) FEUP; A. Mendes (Author) FEUP; M. Manuela M. Raposo (Author) Other

Journal

Title: Dyes and Pigments

Vol. 136

Pages: 46-53

ISSN: 0143-7208

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 23 Citations

ISI Web of Science

Scopus - 27 Citations

Scientific classification

CORDIS: Physical sciences > Chemistry > Organic chemistry

FOS: Natural sciences > Chemical sciences

Associated Projects

BI-DSC - Building Integrated Dye Sensitized Solar Cells

Other information

Authenticus ID: P-00K-RWP

DOI: 10.1016/j.dyepig.2016.08.020

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

Language: English

Type (Professor's evaluation): Scientific

Notes: Journal Citation Reports

No. of pages: 8