Influence of Sodium Cations of N3 Dye on the Photovoltaic Performance and Stability of Dye-Sensitized Solar Cells

• Tipo: Artigo em Revista Científica Internacional
• Data: 2009

Autores

Luísa Andrade (Autor) FEUP; Shaik M. Zakeeruddin (Autor) Outra; Mohammad K. Nazeeruddin (Autor) Outra; Helena Aguilar Ribeiro (Autor) FEUP; Adélio Mendes (Autor) FEUP; Michael Graetzel (Autor) Outra

Revista

Título: ChemPhysChem

Vol. 10 Nº 7

Páginas: 1117-1124

ISSN: 1439-4235

Editora: Wiley-Blackwell

Indexação

ISI Web of Science

Scopus

INSPEC

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Outras ciências da engenharia e tecnologias

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia química

Outras Informações

DOI: doi: 10.1002/cphc.200900111

Abstract (EN): We report on the effect of substituting the two tetrabutyl am-monium counter ions of the standard N719 dye by sodium ions on the performance and stability of dye-sensitized solar cells (DSCs). The disodium analogue of N719 in conjunction with a non-volatile electrolyte gives a conversion efficiency of 7.6% under standard global AM 1.5 sunlight. Devices maintain 99% of their initial performance after 1000 h under full sun-light aging at 50 8C. Electrochemical impedance spectroscopy and photovoltage transient decay studies reveal the evolution of the solar cell parameters during aging. Remarkably, upon aging a decrease in the rate of electron back reaction with the triiodide ions across the TiO2/electrolyte interface appears as well as enhanced electronic conduction in the TiO2 film.

Idioma: Inglês

Tipo (Avaliação Docente): Científica