| Texto completo | |
| Autor(es): |
Andrade, Jr., Marcos A. S.
;
Miettunen, Kati
;
Tiihonen, Armi
;
Lund, Peter D.
;
Nogueira, Ana E.
;
Pastore, Heloise O.
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Electrochimica Acta; v. 228, p. 413-421, FEB 20 2017. |
| Citações Web of Science: | 6 |
| Resumo | |
Organic-inorganic layered materials, such as organotalcs, are a promising alternative as gelling agent for liquid electrolytes in dye-sensitized solar cells. Talcs could provide an abundant, low cost and environmentally friendly option for solidifying the electrolyte. This work focuses on generation 5 polyamideamino dendron-modified talc with emphasis is on how it affects the performance and stability of the DSSC. The talc was shown to improve the initial photocurrent by up to 39% by acting as a light scatterer and/or a recombination barrier compared to reference solar Cells with liquid electrolyte. Non-destructive analysis based on photographic image technique revealed that during the aging the additive absorbed charge carriers, tri-iodide, from the electrolyte reducing the performance of the solar cells. The degradation could, however, be prevented by intercalating polyiodides into interlamellar space of the talc as the resulting dendron chains did not absorb tri-iodide charge carriers from the electrolyte. These quasi-solid solar cells maintained 95% of their initial efficiency under light-soaking at 1 Sun for about 1000 h. The cells with a quasi-solid electrolyte showed up to 5% higher efficiency than those with liquid electrolyte. (C) 2017 Published by Elsevier Ltd. (AU) | |
| Processo FAPESP: | 14/06942-0 - Sólidos lamelares nanoestruturados como catalisadores ácidos, básicos e redox |
| Beneficiário: | Heloise de Oliveira Pastore |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 13/05911-1 - Polieletrólitos lamelares sólidos e em gel para aplicação em células solares de corantes |
| Beneficiário: | Marcos Antonio Santana Andrade Junior |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |