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To deprotect or not to deprotect : phosphonate ester versus phosphonic acid anchor ligands in copper(I)-based dye-sensitized solar cells

Malzner, F. J. and Brauchli, S. Y. and Schönhofer, E. and Constable, E. C. and Housecroft, C. E.. (2014) To deprotect or not to deprotect : phosphonate ester versus phosphonic acid anchor ligands in copper(I)-based dye-sensitized solar cells. Polyhedron, 82 . pp. 116-121.

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Abstract

The performances of n-type DSCs containing the heteroleptic copper(I) dyes [Cu(1)(dmbpy)]+ and [Cu(2)(dmbpy)]+ (1 = ((6,6′-dimethyl-[2,2′-bipyridine]-4,4′-diyl)bis(4,1-phenylene))bis(phosphonic acid);2 = tetraethyl ((6,6′-dimethyl-[2,2′-bipyridine]-4,4′-diyl)bis(4,1-phenylene))bis(phosphonate); dmbpy = 6,6′-dimethyl-2,2′-bipyridine) have been evaluated to determine whether or not deprotection of the phosphonate ester prior to assembly of the heteroleptic [Cu(Lanchor)(Lancillary)]+ dye is an essential step. Fully masked DSCs containing [Cu(1)(dmbpy)]+ with I3−/I− electrolyte show conversion efficiencies, η, of ≈2.1% compared to ≈0.3% for those containing [Cu(2)(dmbpy)]+ in which 2 may be partially deprotected in situ. Compound 2is a surprisingly effective ancillary ligand; DSCs containing [Cu(1)(2)]+ exhibit η ≈2%. EQE spectra for DSCs containing the dyes [Cu(1)(dmbpy)]+ and [Cu(1)(2)]+ are similar, showing broad bands with λmax around 460–480 nm and EQEmax = 40%.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Constable)
05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Housecroft)
UniBasel Contributors:Housecroft, Catherine Elizabeth and Constable, Edwin Charles and Malzner, Frederik Jürgen and Brauchli, Sven and Schönhofer, Ewald
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Elsevier
ISSN:0277-5387
e-ISSN:1873-3719
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Identification Number:
Last Modified:17 Nov 2016 13:27
Deposited On:05 Dec 2014 09:45

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