Structure-efficiency relationship of newly synthesized 4-substituted donor–π–acceptor coumarins for dye-sensitized solar cells

Jadhav, Manoj M.; Vaghasiya, Jayraj V.; Patil, Dinesh S.; Soni, Saurabh S.; Sekar, Nagaiyan

doi:10.1039/c7nj04954d

Cited by 41 publications

(16 citation statements)

References 64 publications

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“…It is believed that the absorption potential of ruthenium sensitizers are improved by co‐sensitization with coumarin moieties because of their amazing light absorbing power in the blue region, tremendous photostability, and suitable HOMO‐LUMO energy levels . Recently, Jadhav et al synthesized a series of coumarin sensitizers for DSSCs, and a maximum efficiency of 4.60% is obtained . In continuation to our previous work towards developing photosensitizers comprising amino anchoring groups, we have presented here an investigation of the synthesis, photophysical, electrochemical properties, and DSSC performances of a new homoleptic ruthenium(II) sensitizer [Ru(dabpy) 3 ]Cl 2 (RDAB3) containing 2,2′‐bipyridyl‐4,4′‐diamine (dabpy) ligands.…”

Section: Introductionsupporting

confidence: 74%

“…12 Recently, Jadhav et al synthesized a series of coumarin sensitizers for DSSCs, and a maximum efficiency of 4.60% is obtained. 13 In continuation to our previous work towards developing photosensitizers comprising amino anchoring groups, we have presented here an investigation of the synthesis, photophysical, electrochemical properties, and DSSC performances of a new homoleptic ruthenium(II) sensitizer [Ru(dabpy) 3 ]Cl 2 (RDAB3) containing 2,2 0bipyridyl-4,4 0 -diamine (dabpy) ligands. RDAB3 contains six amino groups in its structure, two of them acts as electron donating anchoring groups and other four are ancillary ligands.…”

Section: Introductionmentioning

confidence: 99%

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Amine functionalized homoleptic ruthenium(II) sensitizer for dye‐sensitized solar cells: A combined effect of ancillary ligands and co‐sensitization

et al. 2019

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Summary In this work, we propose a homoleptic ruthenium(II) complex, [Ru(dabpy)3]Cl2 (RDAB3) containing amine functionalized electron donating anchoring units for DSSCs. The DSSCs were co‐sensitized by coumarin‐based thiophene (CT) and indole (CI) units. The presence of four ancillary amine groups in RDAB3 influences its photovoltaic performance and the introduction of coumarin‐based co‐sensitizers significantly enhances the efficiency. The fabricated DSSCs were explored by UV‐Visible absorption, photocurrent‐voltage assessments, and impedance spectral studies. Co‐sensitized DSSCs showed an improved photovoltaic efficiency than the device sensitized by RDAB3 alone. Under optimized condition, the device made up of RDAB3+CI exhibited a high Jsc = 9.9 mA/cm2 with Voc of 0.7 V, fill factor of 0.773, and solar to power conversion efficiency of 5.35% in standard global AM 1.5 solar irradiation. This performance is found to be higher than the DSSC sensitized with RDAB3 (η = 3.84%) fabricated under same circumstances.

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Section: Introductionsupporting

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Amine functionalized homoleptic ruthenium(II) sensitizer for dye‐sensitized solar cells: A combined effect of ancillary ligands and co‐sensitization

et al. 2019

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“…Synthesis of intermediate aldehydes 3 and 4. Intermediate aldehydes 3 and 4 were synthesized according to the reported literature (37,38).…”

Section: Methodsmentioning

confidence: 99%

Design and Synthesis of Coumarin–Imidazole Hybrid Chromophores: Solvatochromism, Acidochromism and Nonlinear Optical Properties

Bhagwat

Avhad

Patil

et al. 2018

Photochem & Photobiology

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A set of linear and asymmetric coumarin–imidazole hybrid compounds having a N,N‐diethylamine at 7‐position and imidazole at 3‐position on the coumarin were synthesized. Insertion of thiophene π‐spacer between coumarin and imidazole moieties (5b, 5d) leads to redshifted absorption and emission compared to 5a and 5c. All the compounds show a noticeable response to trifluoroacetic acid with a redshifted absorption and an increase in emission intensity by twofold. The ratio of ground and excited state acidity constant was calculated using Förster energy cycle, and the ratios were found to be 0.25, 0.96, 0.52 and 1.87, respectively, for 5a‐5d. Due to the thiophene π‐spacer, elongation of π‐conjugation in 5b and 5d leads to high values of polarizability (α), first‐order hyperpolarizability (β) and second‐order hyperpolarizability (γ). Compound 5b exhibits a high value (895 GM) of two‐photon absorption cross section (σ2PA), measured using two‐level model.

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“…Extended conjugation in coumarin compound resulted in enhancement of solar cell efficiency. Electrons on trimethoxy groups in the coumarin were causing the conjugation to increase benzene ring and improving the electron transfer ability [45]. These special properties in the coumarin molecule also caused an increase in solar cell performance.…”

Section: Study Of Solar Cell Propertiesmentioning

confidence: 99%

Synthesis and organic solar cell performance of BODIPY and coumarin functionalized SWCNTs or graphene oxide nanomaterials

et al. 2018

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The synthesis and characterization of new hybrid materials based on reduced graphene oxide (rGO) or single walled carbon nanotubes (SWCNTs) covalently functionalized by 4,4'-difluoro-8-(4-propynyloxy)-phenyl-1,3,5,7-tetramethyl-4-bora-3a,4a-diaza-s-indacene (BODIPY) (2) or 7-(prop-2-yn-1-yloxy)-3-(3',4',5'-trimethoxyphenyl)-coumarin (4) as light harvesting groups have been described. The organic solar cell performances of these novel nanomaterials in P3HT:PCBM blends were investigated. These covalently bonded hybrid materials (reduced graphene oxide:BODIPY (GB), reduced graphene oxide:Coumarin (GC), SWCNTs:BODIPY (CB) and SWCNTs:Coumarin (CC)) were prepared by an azide-alkyne Huisgen cycloaddition (click) reaction between the azide bearing SWCNTs or rGO and terminal ethynyl functionalized BODIPY (2) or coumarin (4) derivatives. The formation of novel nanomaterials was confirmed by FT-IR, UV-Vis and Raman spectroscopies and thermogravimetric analysis. The best performance on P3HT:PCBM organic solar cells was produced by SWCNTs:Coumarin (CC) hybrids which were coated on an indium tin oxide coated polyethylene terephthalate film (ITO-PET). The reference device based on the P3HT:PCBM blend without CC showed a power conversion efficiency (PCE) of 1.16%, an FF of 35% and a short-circuit current density (Jsc) of 5.51 mA cm-2. The reference device with CC hybrids within the P3HT:PCBM blend increased the values significantly to 1.62% for PCE, 40% for FF and 6.8 mA cm-2 for Jsc.

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Structure-efficiency relationship of newly synthesized 4-substituted donor–π–acceptor coumarins for dye-sensitized solar cells

Abstract: Substitution at the 4-position of coumarin alters the photophysical, electrochemical and photovoltaic properties of the dyes.

Cited by 41 publications

References 64 publications

Amine functionalized homoleptic ruthenium(II) sensitizer for dye‐sensitized solar cells: A combined effect of ancillary ligands and co‐sensitization

Amine functionalized homoleptic ruthenium(II) sensitizer for dye‐sensitized solar cells: A combined effect of ancillary ligands and co‐sensitization

Design and Synthesis of Coumarin–Imidazole Hybrid Chromophores: Solvatochromism, Acidochromism and Nonlinear Optical Properties

Synthesis and organic solar cell performance of BODIPY and coumarin functionalized SWCNTs or graphene oxide nanomaterials

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