Long-Lived Charge Separated State in NiO-Based p-Type Dye-Sensitized Solar Cells with Simple Cyclometalated Iridium Complexes
2014 (English)In: Journal of Physical Chemistry Letters, ISSN 1948-7185, E-ISSN 1948-7185, Vol. 5, no 13, 2254-2258 p.Article in journal (Refereed) Published
Three new cyclometalated iridium complexes were prepared and investigated on nanocrystalline NiO cathodes. Nanosecond transient absorption spectroscopy experiments show they present a surprisingly slow geminate charge recombination upon excitation on NiO, representing thus the first examples of simple sensitizers with such feature. These complexes were used in dye-sensitized solar cells using nanocrystalline NiO film as semiconductor. The long-lived charge separated state of these Ir complexes make them compatible with other redox mediators than I-3(-)/I-, such as a cobalt electrolyte and enable to reach significantly high open circuit voltage.
Place, publisher, year, edition, pages
2014. Vol. 5, no 13, 2254-2258 p.
IdentifiersURN: urn:nbn:se:uu:diva-230103DOI: 10.1021/jz5009714ISI: 000338693200015OAI: oai:DiVA.org:uu-230103DiVA: diva2:742445