Long-Lived Charge Separated State in NiO-Based p-Type Dye-Sensitized Solar Cells with Simple Cyclometalated Iridium Complexes.
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.
†Université Grenoble Alpes, DCM, F-38000 Grenoble, France CNRS, DCM, F-38000 Grenoble, France.
Marcello
M
Gennari
‡CEISAM, Chimie Et Interdisciplinarité, Synthèse, Analyse, Modélisation, CNRS, UMR CNRS 6230, Université LUNAM, Université de Nantes, 2, rue de la Houssinière - BP 92208; 44322 NANTES Cedex 3 France.
Florent
F
Légalité
§Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, Uppsala, SE75120 Sweden.
Lei
L
Zhang
‡CEISAM, Chimie Et Interdisciplinarité, Synthèse, Analyse, Modélisation, CNRS, UMR CNRS 6230, Université LUNAM, Université de Nantes, 2, rue de la Houssinière - BP 92208; 44322 NANTES Cedex 3 France.
Yann
Y
Pellegrin
‡CEISAM, Chimie Et Interdisciplinarité, Synthèse, Analyse, Modélisation, CNRS, UMR CNRS 6230, Université LUNAM, Université de Nantes, 2, rue de la Houssinière - BP 92208; 44322 NANTES Cedex 3 France.
Errol
E
Blart
†Université Grenoble Alpes, DCM, F-38000 Grenoble, France CNRS, DCM, F-38000 Grenoble, France.
Jérôme
J
Fortage
§Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, Uppsala, SE75120 Sweden.
Allison M
AM
Brown
†Université Grenoble Alpes, DCM, F-38000 Grenoble, France CNRS, DCM, F-38000 Grenoble, France.
Alain
A
Deronzier
†Université Grenoble Alpes, DCM, F-38000 Grenoble, France CNRS, DCM, F-38000 Grenoble, France.
Marie-Noëlle
MN
Collomb
‡CEISAM, Chimie Et Interdisciplinarité, Synthèse, Analyse, Modélisation, CNRS, UMR CNRS 6230, Université LUNAM, Université de Nantes, 2, rue de la Houssinière - BP 92208; 44322 NANTES Cedex 3 France.
Mohammed
M
Boujtita
‡CEISAM, Chimie Et Interdisciplinarité, Synthèse, Analyse, Modélisation, CNRS, UMR CNRS 6230, Université LUNAM, Université de Nantes, 2, rue de la Houssinière - BP 92208; 44322 NANTES Cedex 3 France.|∥Institut Universitaire de France, 103 Boulevard St. Michel, 75005 Paris Cedex 5, France.
Denis
D
Jacquemin
§Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, Uppsala, SE75120 Sweden.
Leif
L
Hammarström
‡CEISAM, Chimie Et Interdisciplinarité, Synthèse, Analyse, Modélisation, CNRS, UMR CNRS 6230, Université LUNAM, Université de Nantes, 2, rue de la Houssinière - BP 92208; 44322 NANTES Cedex 3 France.
Fabrice
F
Odobel
cobalt complex; p-type semiconductor; photoelectrocatalysis; photovoltaic; transient absorption spectroscopy