Long-lived charge separated state in NiO-based p-type dye-sensitized solar cells with simple cyclometalated iridium complexes

Marcello Gennari, Florent Légalité, Lei Zhang, Yann Pellegrin, Errol Blart, Jérôme Fortage, Allison M. Brown, Alain Deronzier, Marie Noëlle Collomb, Mohammed Boujtita, Denis Jacquemin, Leif Hammarström, Fabrice Odobel

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56 Citations (Scopus)

Abstract

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 I3-/I-, such as a cobalt electrolyte and enable to reach significantly high open circuit voltage.

Original languageEnglish
Pages (from-to)2254-2258
Number of pages5
JournalJournal of Physical Chemistry Letters
Volume5
Issue number13
DOIs
Publication statusPublished - Jul 3 2014

Keywords

  • cobalt complex
  • p-type semiconductor
  • photoelectrocatalysis
  • photovoltaic
  • transient absorption spectroscopy

ASJC Scopus subject areas

  • Materials Science(all)
  • Physical and Theoretical Chemistry

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    Gennari, M., Légalité, F., Zhang, L., Pellegrin, Y., Blart, E., Fortage, J., Brown, A. M., Deronzier, A., Collomb, M. N., Boujtita, M., Jacquemin, D., Hammarström, L., & Odobel, F. (2014). Long-lived charge separated state in NiO-based p-type dye-sensitized solar cells with simple cyclometalated iridium complexes. Journal of Physical Chemistry Letters, 5(13), 2254-2258. https://doi.org/10.1021/jz5009714