Highly-stable Cu(I)/(II) oxazoline-bipyridine complexes
Hannes Michaels a
a Uppsala University, Sweden, Uppsala, Sweden
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV18)
Benidorm, Spain, 2018 May 28th - 31st
Organizers: Emilio Palomares and Rene Janssen
Oral, Hannes Michaels, presentation 072
DOI: https://doi.org/10.29363/nanoge.hopv.2018.072
Publication date: 21st February 2018

Cu(I)/(II) oxazoline-bipyridine complexes as highly-stable tetradendate redox mediators

Hannes Michaels, Marina Freitag, Gerrit Boschloo
Department of Chemistry, Ångström Laboratory, Uppsala University, Sweden

In the past years, several metal complexes redox electrolytes for dye-sensitized solar cells based on Cu as well as Co have been reported.1,2 These complexes, however, are often subject to conformational change upon charging/discharging.

In this study, we investigate a new tetradendate Cu(I)/(II) oxazoline-bipyridine complex. The connection of all four coordinating nitrogen atoms into one ligand molecule minimizes coordinational reorganization energies upon oxidation state change and leads to extraordinary stability of these complexes. We successfully prepare dye-sensitized solar cells using the Y123 dye as photoabsorber with conversion efficiencies exceeding 8% at 1000 W m‑2 AM1.5G.

(1)       Freitag, M.; Giordano, F.; Yang, W.; Pazoki, M.; Hao, Y.; Zietz, B.; Grätzel, M.; Hagfeldt, A.; Boschloo, G. J. Phys. Chem. C 2016, 120 (18), 9595–9603.

(2)       Saygili, Y.; Söderberg, M.; Pellet, N.; Giordano, F.; Cao, Y.; Munoz-García, A. B.; Zakeeruddin, S. M.; Vlachopoulos, N.; Pavone, M.; Boschloo, G.; Kavan, L.; Moser, J. E.; Grätzel, M.; Hagfeldt, A.; Freitag, M. J. Am. Chem. Soc. 2016, 138 (45), 15087–15096.

 

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