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https://hdl.handle.net/1822/44490
Título: | 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 |
Autor(es): | Fernandes, Sara Sofia Marques Castro, Maria Cidália Rodrigues Mesquita, I. Andrade, L. Mendes, A. Raposo, M. Manuela M. |
Palavras-chave: | Dye sensitized solar cells (DSSCs) Heterocyclic organic dye Metal-free thieno[3,2-b]thiophene dye Cyanoacetic acid anchoring group Heterocyclic donor groups Co-adsorption Synthesis UV-Vis. Fluorescence Push-pull systems Dye sensitized solar cells Metal-free thieno[3,2-b]thlophene dye |
Data: | Jan-2017 |
Editora: | Elsevier 1 |
Revista: | Dyes and Pigments |
Citação: | Fernandes, S. S. M.; Castro, M. C. R.; Mesquita, I.; Andrade, L.; Mendes, A.; Raposo, M. M. M. 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. Dyes Pigments 2017, 136, 46-53. |
Resumo(s): | 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 16–77%. The best efficiency was 4.40%, corresponding to 54% of the photovoltaic performance of the N719-based DSSC fabricated and measured under similar conditions. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/44490 |
DOI: | 10.1016/j.dyepig.2016.08.020 |
ISSN: | 0143-7208 |
e-ISSN: | 1873-3743 |
Versão da editora: | http://www.sciencedirect.com/science/article/pii/S014372081630417X |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Dyes and Pigments 2017, 136, 46-53.pdf | 664,18 kB | Adobe PDF | Ver/Abrir |