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Influence of Sodium Cations of N3 Dye on the Photovoltaic Performance and Stabi...
Luísa Andrade; Shaik M. Zakeeruddin; Mohammad K. Nazeeruddin; Helena Aguilar Ribeiro; Adélio Mendes; Michael GraetzelWe 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 unde...
Influence of Different Cations of N3 Dyes on Their Photovoltaic Performance and...
Luísa Andrade; Shaik M. Zakeeruddin; Mohammad K. Nazeeruddin; Helena Aguilar Ribeiro; Adélio Mendes; Michael GraetzelThe 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 ...
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