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Homoleptic and Heteroleptic Copper Complexes as Redox Couples in Dye‐Sensitized Solar Cells
Author(s) -
Lennert Annkatrin,
Guldi Dirk M.
Publication year - 2019
Publication title -
chemphotochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.13
H-Index - 18
ISSN - 2367-0932
DOI - 10.1002/cptc.201900104
Subject(s) - homoleptic , copper , redox , dye sensitized solar cell , dielectric spectroscopy , electrochemistry , chemistry , photochemistry , spectroscopy , ligand (biochemistry) , ultrafast laser spectroscopy , absorption spectroscopy , combinatorial chemistry , inorganic chemistry , electrode , metal , organic chemistry , optics , biochemistry , physics , receptor , quantum mechanics , electrolyte
Abstract To gather a comprehensive understanding of copper complexes as redox couples in dye‐sensitized solar cells (DSSCs), a series of copper complexes were synthesized and thoroughly characterized. Characterization was undertaken using an arsenal of spectroscopic techniques, including steady‐state spectroscopy, electrochemical and spectroelectrochemical assays, current‐voltage measurements, electrochemical impedance spectroscopy (EIS), and transient absorption spectroscopy (TAS). Starting from a homoleptic copper complex featuring two bathocuproine ligands and replacing one of them by either another N‐ or a P‐coordinating ligand, a clear relationship between ligand size, on one hand, and charge transport, recombination as well as effective regeneration of the sensitizer, on the other hand, was established. With this information in hand, the future targeted synthesis of copper complexes to achieve maximum device performance may be achieved.