Dicyanovinyl and Cyano-Ester Benzoindolenine Squaraine Dyes: The Effect of the Central Functionalization on Dye-Sensitized Solar Cell Performance

Galliano, S.; Novelli, Vittoria; Barbero, Nadia; Smarra, Alessandra; Viscardi, Guido; Borrelli, Raffaele; Sauvage, Frédéric; Barolo, Claudia

doi:10.3390/en9070486

Cited by 28 publications

(29 citation statements)

References 34 publications

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“…The fulfilment of these requirements would allow an effective action of dye‐sensitization towards the solar radiation for wide bandgap semiconductors of p‐type. The choice of the class of squaraine dyes is motivated mainly by the versatility of their synthetic chemistryand by the characteristic red‐shifted absorption with respect to the dyes commonly employed as sensitizers of DSCs . This represents an added value of the squaraine in the perspective of developing and assembling t ‐DSCs with the two photoelectrodes sensitized by dyes with complementary absorption features.…”

Section: Introductionmentioning

confidence: 99%

Effect of Alkyl Chain Length on the Sensitizing Action of Substituted Non‐Symmetric Squaraines for p‐Type Dye‐Sensitized Solar Cells

et al. 2017

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The design and the synthesis of three unsymmetrical squaraines, DS_34, DS_45, and DS_47, have been achieved for their utilization as sensitizers of screen‐printed NiO cathodes in p‐type dye‐sensitized solar cells (p‐DSCs). DS_34, DS_45, and DS_47 are bidentate dyes, each bearing two carboxylic anchoring groups, which differ solely in the length of alkyl chain attached to the nitrogen atom of the condensed pyrrole ring (ethyl, butyl, and dodecyl for DS_45, DS_34, and DS_47, respectively). The photoelectrochemical properties of the corresponding p‐DSCs are compared and analyzed in terms of the structural differences of DS_34, DS_45, and DS_47. The benchmark dye, p‐SQ2, has also been employed as a p‐DSC sensitizer for the sake of comparison. Current density−voltage (JV) curves and incident photon‐to‐current conversion efficiency (IPCE) spectra revealed the major efficaciousness of the DS_45 as a dye‐sensitizer, as it was the only system that produced a p‐DSC surpassing 0.04 % of overall efficiency (η). This finding was attributed mainly to the larger surface concentration of chemisorbed DS_45 with respect to the other squaraines.

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Section: Introductionmentioning

confidence: 99%

Effect of Alkyl Chain Length on the Sensitizing Action of Substituted Non‐Symmetric Squaraines for p‐Type Dye‐Sensitized Solar Cells

et al. 2017

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“…This occurs through a twisted intramolecular charge transfer (TICT) process that yields a non‐radiative decay of the dye excited state. Intersystem crossing is a radiationless process that squaraine dye also undergoes .…”

Section: Resultsmentioning

confidence: 99%

Fluorescent amino‐substituted squaraine probes for bovine serum albumin

Jurek

Kabatc

Kostrzewska

2017

Coloration Technology

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The synthesis and spectroscopic properties of fluorescent amino-substituted squaraine dyes have been presented. The interaction between bovine serum albumin (BSA) and fluorescence probes derived from squaric acid was studied by UV-vis and fluorescence spectroscopies. The Benesi-Hildebrand, Lehrer, and Stern-Volmer equations were used to present the influence of BSA concentration on the binding constant for the process of association with squaraine dyes, as well as the effect of the concentration of fluorescence probes on the quenching process. It was also shown that the interaction between BSA and squaraine dyes is spontaneous. The number of binding sites to bovine serum albumin for a series of squaraine dyes has also been calculated.

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“…In the present work, we have reported the synthesis of a new squaraine dye, VG21-C12, that presents a symmetric structure with a cyano-acrylic unit as an anchoring moiety. Compared to the classical squaraines [i.e., VG1, (Park et al, 2012) VG10 (Park et al, 2014) and VG2 (Galliano et al, 2016) series], the new sensitizer comprises a thiophene unit as an additional spacer. VG21-C12 was employed as sensitizers in p-type DSCs.…”

Section: Discussionmentioning

confidence: 99%

Sodium Hydroxide Pretreatment as an Effective Approach to Reduce the Dye/Holes Recombination Reaction in P-Type DSCs

et al. 2019

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We report the synthesis of a novel squaraine dye (VG21-C12) and investigate its behavior as p-type sensitizer for p-type Dye-Sensitized Solar Cells. The results are compared with O4-C12, a well-known sensitizer for p-DSC, and sodium hydroxide pretreatment is described as an effective approach to reduce the dye/holes recombination. Various variable investigation such as dipping time, dye loading, photocurrent, and resulting cell efficiency are also reported. Electrochemical impedance spectroscopy (EIS) was utilized for investigating charge transport properties of the different photoelectrodes and the recombination phenomena that occur at the (un)modified electrode/electrolyte interface.

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Dicyanovinyl and Cyano-Ester Benzoindolenine Squaraine Dyes: The Effect of the Central Functionalization on Dye-Sensitized Solar Cell Performance

Cited by 28 publications

References 34 publications

Effect of Alkyl Chain Length on the Sensitizing Action of Substituted Non‐Symmetric Squaraines for p‐Type Dye‐Sensitized Solar Cells

Effect of Alkyl Chain Length on the Sensitizing Action of Substituted Non‐Symmetric Squaraines for p‐Type Dye‐Sensitized Solar Cells

Fluorescent amino‐substituted squaraine probes for bovine serum albumin

Sodium Hydroxide Pretreatment as an Effective Approach to Reduce the Dye/Holes Recombination Reaction in P-Type DSCs

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