TY - JOUR
T1 - A Comparative Investigation of the Role of the Anchoring Group on Perylene Monoimide Dyes in NiO-Based Dye-Sensitized Solar Cells
AU - Farré, Yoann
AU - Maschietto, Federica
AU - Föhlinger, Jens
AU - Wykes, Mike
AU - Planchat, Aurélien
AU - Pellegrin, Yann
AU - Blart, Errol
AU - Ciofini, Ilaria
AU - Hammarström, Leif
AU - Odobel, Fabrice
N1 - Funding Information:
The authors are grateful to Agence Nationale de la Recherche (ANR) for the financial support of these researches through the program POSITIF (ANR‐12‐PRGE‐0016‐01) and Région des Pays de la Loire for the project LUMOMAT, to the Swedish Research Council (Project no 2014–5921) and the Swedish Energy Agency (Project no 4359‐1). IC and FM have received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement No 648558).
PY - 2020/4/7
Y1 - 2020/4/7
N2 - The anchoring group of a sensitizer may strongly affect the overall properties and stability of the resulting dye-sensitized solar cells (DSSCs) and dye-sensitized photoelectrosynthetic solar cells (DSPECs). The properties of seven perylene monoimide (PMI) dyes have been comprehensively studied for their immobilization on nanocrystalline NiO film. The PMI dyes differ only by the nature of the anchoring group, which are: carboxylic acid (PMI-CO2H), phosphonic acid (PMI-PO3H2), acetyl acetone (PMI-acac), pyridine (PMI-Py), aniline (PMI-NH2), hydroxyquinoline (PMI-HQ), and dipicolinic acid (PMI-DPA). The dyes are investigated by cyclic voltammetry and spectroelectrochemistry and modeled by TD-DFT quantum chemical calculations. The mode of binding of these anchoring groups is investigated by infrared spectroscopy and the stability of the binding to NiO surface is studied by desorption experiments in acidic and basic media. The phosphonic acid group is found to offer the strongest binding to the NiO surface in terms of stability and dye loading. Finally, a photophysical study by ultrafast transient absorption spectroscopy shows that all dyes inject a hole in NiO with rate constants on a subpicosecond timescale and display similar charge recombination kinetics. The photovoltaic properties of the dyes show that PMI-HQ and PMI-acac give the highest photovoltaic performances, owing to a lower degree of aggregation on the surface.
AB - The anchoring group of a sensitizer may strongly affect the overall properties and stability of the resulting dye-sensitized solar cells (DSSCs) and dye-sensitized photoelectrosynthetic solar cells (DSPECs). The properties of seven perylene monoimide (PMI) dyes have been comprehensively studied for their immobilization on nanocrystalline NiO film. The PMI dyes differ only by the nature of the anchoring group, which are: carboxylic acid (PMI-CO2H), phosphonic acid (PMI-PO3H2), acetyl acetone (PMI-acac), pyridine (PMI-Py), aniline (PMI-NH2), hydroxyquinoline (PMI-HQ), and dipicolinic acid (PMI-DPA). The dyes are investigated by cyclic voltammetry and spectroelectrochemistry and modeled by TD-DFT quantum chemical calculations. The mode of binding of these anchoring groups is investigated by infrared spectroscopy and the stability of the binding to NiO surface is studied by desorption experiments in acidic and basic media. The phosphonic acid group is found to offer the strongest binding to the NiO surface in terms of stability and dye loading. Finally, a photophysical study by ultrafast transient absorption spectroscopy shows that all dyes inject a hole in NiO with rate constants on a subpicosecond timescale and display similar charge recombination kinetics. The photovoltaic properties of the dyes show that PMI-HQ and PMI-acac give the highest photovoltaic performances, owing to a lower degree of aggregation on the surface.
KW - dyes
KW - immobilization
KW - photovoltaics
KW - polycycles
KW - solar cells
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U2 - 10.1002/cssc.201903182
DO - 10.1002/cssc.201903182
M3 - Article
C2 - 31995667
AN - SCOPUS:85081736894
VL - 13
SP - 1844
EP - 1855
JO - ChemSusChem
JF - ChemSusChem
SN - 1864-5631
IS - 7
ER -