Influence of Different Cations of N3 Dyes on Their Photovoltaic Performance and...

• Autor(es): Luísa Andrade ; Shaik M. Zakeeruddin ; Mohammad K. Nazeeruddin ; Helena Aguilar Ribeiro ; Adélio Mendes ; Michael Graetzel
• Data: 2009
• Identificador Persistente: http://hdl.handle.net/10216/67952
• Origem: Repositório Aberto da Universidade do Porto
• Assunto(s): Ciências Tecnológicas; Engenharia; Engenharia química
• Tipo de Documento: Artigo
• Idioma: Inglês

Descrição

The N3 dye was modified by substituting two of its protons by potassium or sodium cations. The performance and stability of dye-sensitized solar cells incorporating the new dyes were evaluated under light soaking (1000W · m−2 )at50◦C. Photocurrent measurements demonstrated that proton substitution by potassiumcations rends the systemmore stable. Further characterization of the potassium-based devices was performed by electrochemical impedance spectroscopy to investigate the charge-transfer phenomena occurring at the different interfaces of the cells.