Dye-Sensitized Solar Cells for Efficient Solar and Artificial Light Conversion

• Tipo: Artigo em Revista Científica Internacional
• Data: 2019

Autores

Hora, C (Autor) Outra; Santos, F (Autor) Outra; Sales, MGF (Autor) Outra; Ivanou, D (Autor) Outra; Adélio Mendes (Autor) FEUP

Revista

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Título: ACS SUSTAINABLE CHEMISTRY & ENGINEERING

Vol. 7

ISSN: 2168-0485

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 10 Citações

Outras Informações

ID Authenticus: P-00Q-YHN

DOI: 10.1021/acssuschemeng.9b02990

Abstract (EN): Progress in dye-sensitized solar cells (DSSCs) has been benchmarked with N719 dye-based devices. However, power conversion efficiency (PCE) improvements performed in low-energy-performing devices cannot be extrapolated to high-performing ones. This points to the need for using a high PCE reference DSSC device, which preferably should be possible for preparation using readily available commercial reactants and parts. This study reports an optimized DSSC prepared with commercial reactants, displaying a PCE of up to 9.84% under simulated solar light and of 28.7% under artificial room light. The efficient light harvesting in the photoanode and electron recombination suppression in the photoanode/electrolyte interface were systematically optimized; the thickness and light-scattering ability of the photoanode mesoporous layers were tuned to maximize light harvesting and minimize the recombination losses. Electron back recombination with electrolyte was minimized using a TiO2 blocking layer and treating the mesoporous layer of TiO2 with TiCl4. Finally, despite the use of a light-scattering TiO2 coating over the mesoporous layer, the use of a light reflection layer applied to the back of the devices proved to improve the PCE further.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 13