Effect of the bridge substitution on the efficiency of dye-sensitized solar cells

Pelado, Beatriz; Cruz, Pilar de la; González-Pedro, Victoria; Barea, Eva M.; Langa, Fernando

doi:10.1016/j.tetlet.2012.09.091

Cited by 8 publications

(3 citation statements)

References 28 publications

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“…[12][13][14] As an electron spacer to connect the donor and acceptor, the p-linker determines not only the light-harvesting characteristics of the chromophore, but also the electron injection from the excited dyes to the TiO 2 surface, accompanied by electron donor and acceptor moieties. [15][16][17][18][19][20][21][22][23] To date, the design of sensitizers with good photovoltaic properties has focused primarily on engineering (i) the electronic nature of the D and A moieties and (ii) the conjugation of the p-linker. The former controls the D-A mixing with respect to a specic bridge, while the latter plays a key role in modulating D-A electronic coupling as well as the magnitude of the change in dipole moment.…”

Section: Introductionmentioning

confidence: 99%

D–π–A structured porphyrins for efficient dye-sensitized solar cells

Cao

et al. 2013

J. Mater. Chem. A

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Section: Introductionmentioning

confidence: 99%

D–π–A structured porphyrins for efficient dye-sensitized solar cells

Cao

et al. 2013

J. Mater. Chem. A

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“…Precursor aldehyde 4 was prepared in 29% yield by Horner-Wadsworth-Emmons reaction between porphyrin phosphonate 1 [13] and trans-bis-(3,4-ethylenedioxythiophene)vinylenebiscarbaldehyde (3) [14] at room temperature in the presence of NaH as base and under careful stoichiometric conditions (Scheme 1). Compound 4 was fully characterized by spectroscopic techniques; the 1 H NMR showed, the formyl proton at d = 9.91 ppm and all the rest of the expected signals; particularly interesting is that the E configuration of both double bonds are confirmed by the measured coupling constant values (J = 16 Hz in both cases).…”

Section: Resultsmentioning

confidence: 99%

Free-base porphyrin and [60]fullerene linked by oligomeric ethylenedioxythienylenevinylene bridge

Pelado

Coro

Cruz

et al. 2015

J. Porphyrins Phthalocyanines

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The synthesis and structural characterization and the study of the electronic properties of two novel porphyrin-bridge-fullerene molecules, where a free-based porphyrin and [60]fullerene are connected through one and two units of ethylenedioxythienylenevinylene p-conjugated bridges, is reported. The absorption studies, voltamperometric measurements and theoretical calculations at DFT level are presented. A HOMO-LUMO gap as low as 1.41 eV has been found for compound 6.

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“…Reaction of phosphonate 4 and aldehyde 2 in the presence of NaH afforded 2 EDOTV in 53 %. On the other hand, reaction of phosphonate 4 with aldehydes 5 [14] or 6 [15] (stoichiometry 2:1) by using the same base, gave rise to oligomers 3 EDOTV and 4 EDOTV in 26 and 20 %, respectively. All new compounds were fully characterised by 1 H and 13 C NMR and FTIR spectroscopy as well as MALDI mass spectrometry (see Figures S1-17 in the Supporting Information).…”

Section: Synthesismentioning

confidence: 99%

Robust Ethylenedioxythiophene–Vinylene Oligomers from Fragile Thiophene–Vinylene Cores: Synthesis and Optical, Chemical and Electrochemical Properties of Multicharged Shapes

Burrezo

Pelado

Ortiz

et al. 2014

Chemistry A European J

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Oligomers of ethylendioxythiophene-vinylene have been prepared. Their optical, electrochemical and chemical properties have been studied in detail by absorption and emission spectroscopy as well as cyclic voltammetry, Raman techniques and spectroelectrochemistry complemented with quantum chemical calculations. A comparison with their non-ethylendioxy and non-vinylene parents has been done. The inclusion of the EDO plus the vinylene function generates more robust electronic ground states regarding the largely flexible thiophene-vinylene (n TV) oligomeric homologues. The redox features of the new compounds are also rich of oxidative processes arising as an interesting stabilising balance effect between the oxygen fragment in the EDO groups (mesomeric effect) and the linear π-conjugated structure. The oxidised species have been characterised, which show the ability for the formation of mixed valence charge-transfer complexes and π dimers of different oxidation states, in particular, in the electrochemical medium, resulting that the electrochemical response is accounted for a succession of aggregation and electron-transfer steps. With this work, a full understanding of the optical and electronic properties of these new oligomers in the context of the oligomer approach has been proposed.

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Effect of the bridge substitution on the efficiency of dye-sensitized solar cells

Cited by 8 publications

References 28 publications

D–π–A structured porphyrins for efficient dye-sensitized solar cells

D–π–A structured porphyrins for efficient dye-sensitized solar cells

Free-base porphyrin and [60]fullerene linked by oligomeric ethylenedioxythienylenevinylene bridge

Robust Ethylenedioxythiophene–Vinylene Oligomers from Fragile Thiophene–Vinylene Cores: Synthesis and Optical, Chemical and Electrochemical Properties of Multicharged Shapes

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