Diketopyrrolopyrrole derivatives for efficient NiO-based dye-sensitized solar cells

Favereau, Ludovic; Warnan, Julien; Pellegrin, Yann; Blart, Errol; Boujtita, Mohammed; Jacquemin, Denis; Odobel, Fabrice

doi:10.1039/c3cc44232b

Cited by 73 publications

(84 citation statements)

References 19 publications

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“…30 Solvents employed for this study (dichloromethane (Aldrich, UV spectroscopy grade), ethanol (Aldrich, 99.5% spectroscopy grade), propylene carbonate (Aldrich, 99% ACS reagent grade) were used without further purification unless otherwise noted. 30 Solvents employed for this study (dichloromethane (Aldrich, UV spectroscopy grade), ethanol (Aldrich, 99.5% spectroscopy grade), propylene carbonate (Aldrich, 99% ACS reagent grade) were used without further purification unless otherwise noted.…”

Section: Experimental Section Generalmentioning

confidence: 99%

“…30 Solvents employed for this study (dichloromethane (Aldrich, UV spectroscopy grade), ethanol (Aldrich, 99.5% spectroscopy grade), propylene carbonate (Aldrich, 99% ACS reagent grade) were used without further purification unless otherwise noted. 30 For spectroscopic measurements on solution samples, a quartz cuvette with 1 cm path length was used (1 mm for the fs experiments), unless otherwise noted. 30 For spectroscopic measurements on solution samples, a quartz cuvette with 1 cm path length was used (1 mm for the fs experiments), unless otherwise noted.…”

Section: Experimental Section Generalmentioning

confidence: 99%

“…However, the rapid charge recombination between the injected holes and the reduced sensitizer is much faster in p-DSSCs than conventional DSSCs based on n-SC, such as TiO 2 , and occurs in most cases on a less than 1 ns time scale. 30 The photovoltaic performances show that the photocurrent increased with the replacement of the bromine group by better acceptor groups: a thiophene-dicyanovinylene or a secondary electron acceptor (NDI), in the presence of an iodide/triiodide electrolyte. An important strategy to overcome the quite usual fast charge recombination is the development of dye-acceptor dyads to rapidly localize the ejected electron far away from the NiO surface.…”

Section: Introductionmentioning

confidence: 99%

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Ultrafast and slow charge recombination dynamics of diketopyrrolopyrrole–NiO dye sensitized solar cells

Zhang

Favereau

Farré

et al. 2016

Phys. Chem. Chem. Phys.

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In a photophysical study, two diketopyrrolopyrrole (DPP)-based sensitizers functionalized with 4-thiophenecarboxylic acid as an anchoring group and a bromo (DPPBr) or dicyanovinyl (DPPCN2) group, and a dyad consisting of a DPP unit linked to a naphthalenediimide group (DPP-NDI), were investigated both in solution and grafted on mesoporous NiO films. Femtosecond transient absorption measurements indicate that ultrafast hole injection occurred predominantly on a timescale of ∼200 fs, whereas the subsequent charge recombination occurred on a surprisingly wide range of timescales, from tens of ps to tens of μs; this kinetic heterogeneity is much greater than is typically observed for dye-sensitized TiO2 or ZnO. Also, in contrast to what is typically observed for dye-sensitized TiO2, there was no significant dependence on the excitation power of the recombination kinetics, which can be explained by the hole density being comparatively higher near the valence band of NiO before excitation. The additional acceptor group in DPP-NDI provided a rapid electron shift and stabilized charge separation up to the μs timescale. This enabled efficient (∼95%) regeneration of NDI by a Co(III)(dtb)3 electrolyte (dtb = 4,4'-di-tert-butyl-2,2'-bipyridine), according to transient absorption measurements. The regeneration of DPPBr and DPPCN2 by Co(III)(dtb)3 was instead inefficient, as most recombination for these dyes occurred on the sub-ns timescale. The transient spectroscopy data thus corroborated the trend of the published photovoltaic properties of dye-sensitized solar cells (DSSCs) based on these dyes on mesoporous NiO, and show the potential of a design strategy with a secondary acceptor bound to the dye. The study identifies rapid initial recombination between the dye and NiO as the main obstacle to obtaining high efficiencies in NiO-based DSSCs; these recombination components may be overlooked when studies are conducted using only methods with ns resolution or slower.

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Section: Experimental Section Generalmentioning

confidence: 99%

“…30 Solvents employed for this study (dichloromethane (Aldrich, UV spectroscopy grade), ethanol (Aldrich, 99.5% spectroscopy grade), propylene carbonate (Aldrich, 99% ACS reagent grade) were used without further purification unless otherwise noted. 30 For spectroscopic measurements on solution samples, a quartz cuvette with 1 cm path length was used (1 mm for the fs experiments), unless otherwise noted. 30 For spectroscopic measurements on solution samples, a quartz cuvette with 1 cm path length was used (1 mm for the fs experiments), unless otherwise noted.…”

Section: Experimental Section Generalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ultrafast and slow charge recombination dynamics of diketopyrrolopyrrole–NiO dye sensitized solar cells

Zhang

Favereau

Farré

et al. 2016

Phys. Chem. Chem. Phys.

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“…3 For example, perylene imides, 4 push-pull systems, 5 diketopyrrolopyrroles (DPPs), 6 squaraines, 7 BODIPYs, 8 porphyrins, 9 ruthenium 10 and iridium 11 polypyridine complexes were studied in NiO based p-DSSCs and some of them proved to be rather effective sensitizers. 1 A p-type dye sensitized solar cell (p-DSSC) is composed of a nanocrystalline lm of a wide bandgap p-SC (generally NiO) covered by a monolayer of a sensitizer.…”

Section: Introductionmentioning

confidence: 99%

Isoindigo derivatives for application in p-type dye sensitized solar cells

et al. 2015

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In this study, we have investigated for the first time the use of isoindigo derivatives as sensitizers in NiObased\ud dye-sensitized solar cells (DSSCs). For this purpose, two indigo sensitizers were prepared and their\ud electronic properties were characterized by UV/visible spectroscopy, cyclic voltammetry and timedependent\ud density functional theory (TD-DFT). The first dye contains a N,N-di(4-benzoic acid)\ud phenylamine moiety acting as anchoring/donor group, and the isoindigo acting as the acceptor, while\ud the second compound is a dyad which is based on the same structure, but is additionally\ud functionalized with a naphthalene imide unit, acting as a secondary electron acceptor. The electronic\ud properties were also modeled by TD-DFT quantum chemistry calculations and they revealed that\ud a charge transfer band is present between the trisarylamine donor part and the isoindigo moiety. The\ud photovoltaic performances of these new dyes were evaluated in NiO-based DSSCs with both iodide/\ud triiodide and cobalt electrolytes. It turned out that they perform well since the photocurrent was\ud generated up to the wavelength of 700 nm. Altogether, these results underscore the viability of\ud isoindigo dyes for p-DSSCs

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“…Interest in pDSC may also be partially due to the crowded nature of nDSC research and the desire of researchers to find niche areas of research in which they can potentially have a greater impact. Until recently, with the commercial availability of dyes specifically designed for pDSCs [68], C343 sensitized NiO remained the 'unofficial standard' for photocathodes, used as a control in a number of studies [69][70][71][72][73][74][75][76][77][78][79].…”

Section: Overview Of Pdsc Developmentmentioning

confidence: 99%

Developments in and prospects for photocathodic and tandem dye-sensitized solar cells

Nattestad¹,

Perera²,

Spiccia³

2016

Journal of Photochemistry and Photobiology C: Photochemistry Re

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Third generation photovoltaics are based on the concept of providing high conversion efficiencies with low device production costs. As such, second generation concepts, such as Dye-sensitized Solar Cells (DSCs), serve as a good starting point for the development of these new devices. Tandem DSC devices are one example of such a concept, and can be constructed using two photoactive electrodes (one photoanode and one photocathode) inside the one cavity, increasing the theoretical efficiency limit by around 50% as compared to the conventional design. As there has been substantial effort devoted to the development of ntype DSCs, the focus of researchers investigating tandem DSCs has been to create high performance p-type systems, which operate by an analogous, but inverted, mechanism to n-type DSCs.

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Diketopyrrolopyrrole derivatives for efficient NiO-based dye-sensitized solar cells

Cited by 73 publications

References 19 publications

Ultrafast and slow charge recombination dynamics of diketopyrrolopyrrole–NiO dye sensitized solar cells

Ultrafast and slow charge recombination dynamics of diketopyrrolopyrrole–NiO dye sensitized solar cells

Isoindigo derivatives for application in p-type dye sensitized solar cells

Developments in and prospects for photocathodic and tandem dye-sensitized solar cells

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