Neutral copper(i) dipyrrin complexes and their use as sensitizers in dye-sensitized solar cells
Authors:
- 24 January 2014
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Dalton Transactions
- Vol. 43 (10) , 4127-4136
Abstract
Heteroleptic neutral copper(I) dipyrrin complexes have been synthesised with the general formula [Cu(4,4′-(R)-6,6′-(CH3)-bipyridine)(dipyrrin)], R = CH3 or CO2Et, and H-dipyrrin is either 1,3,7,9-tetramethyldipyrromethene (HL1), 1,13-diphenyl-6,8-diisoindolemethene (HL2), or 1,13-diphenyl-3,11-di(trifluoromethyl)-6,8-diisoindolemethene (HL3). Improved stability was observed across the series L1–L3, likely due to better steric constraints between the ligands. Visible light absorption has also been enhanced with a red-shift in absorption from 450 nm to 600 nm. Complex 3 shows photoluminescence lifetime in the order of nanoseconds suggesting singlet fluorescence which is supported by theoretical calculations. Study of the complexes as sensitisers in dye-sensitised solar cells was achieved by assembling the dye in situ on the surface of TiO2 in a series of steps (anchoring ligand followed by ancillary ligand and [Cu(CH3CN)4][BF4]. The highest efficiency achieved was 0.41% for the dye with HL3, attributed to better dye regeneration due to a more favourable oxidation potential.Keywords
Funding Information
- Engineering and Physical Sciences Research Council (EP/G031088/1)
This publication has 48 references indexed in Scilit:
- Highly efficient green organic light-emitting diodes containing luminescent tetrahedral copper(i) complexesJournal of Materials Chemistry C, 2012
- Copper(i) complexes for sustainable light-emitting electrochemical cellsJournal of Materials Chemistry, 2011
- Highly Efficient Green Organic Light-Emitting Diodes Containing Luminescent Three-Coordinate Copper(I) ComplexesJournal of the American Chemical Society, 2011
- A Codeposition Route to CuI−Pyridine Coordination Complexes for Organic Light-Emitting DiodesJournal of the American Chemical Society, 2011
- Sticky complexes: carboxylic acid-functionalized N-phenylpyridin-2-ylmethanimine ligands as anchoring domains for copper and ruthenium dye-sensitized solar cellsDalton Transactions, 2010
- Copper(i) complexes of 6,6′-disubstituted 2,2′-bipyridine dicarboxylic acids: new complexes for incorporation into copper-based dye sensitized solar cells (DSCs)Dalton Transactions, 2009
- An element of surprise—efficient copper-functionalized dye-sensitized solar cellsChemical Communications, 2008
- Copper(I) complex employed in organic light-emitting electrochemical cells: Device and spectra shiftApplied Physics Letters, 2005
- Synthesis of a new copper(i) complex, [Cu(tmdcbpy)2]+ (tmdcbpy = 4,4′,6,6′-tetramethyl-2,2′-bipyridine-5,5′-dicarboxylic acid), and its application to solar cellsJ. Chem. Soc., Dalton Trans., 2002
- Spectral sensitization of large-band-gap semiconductors (thin films and ceramics) by a carboxylated bis(1,10-phenanthroline)copper(I) complexJ. Chem. Soc., Dalton Trans., 1994