Push-Pull Zinc Porphyrins as Light-Harvesters for Efficient Dye-Sensitized Solar Cells

Lu, Jianfeng; Liu, Shuangshuang; Wang, Mingkui

doi:10.3389/fchem.2018.00541

Cited by 67 publications

(47 citation statements)

References 152 publications

(168 reference statements)

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“…This process, which we refer to as the laser-induced transfer of electron (LITE) process, determines the emission timing of the electrons via electron-electron interaction and, thus, depending on the CEP, influences the momenta of the emitted electrons. As a result, the effect of LITE can be observed in our experiments and simulations when comparing the asymmetry of electron emission as a function of CEP for the two ionizationfragmentation channels Ar (1,2) → Ar nþ þ Ar mþ . In our experiments, argon dimers created by supersonic expansion of a few bars of argon gas were ionized by intense laser pulses, linearly polarized along z, with a full width at half maximum (FWHM) duration in intensity of 4.5 fs and a peak intensity, calibrated in in situ [42], of 5 × 10 14 W cm −1 , inside the ultrahigh vacuum chamber of a reaction microscope [43].…”

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confidence: 59%

Laser-Induced Electron Transfer in the Dissociative Multiple Ionization of Argon Dimers

Wang

Lai

et al. 2020

Phys. Rev. Lett.

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We report on an experimental and theoretical study of the ionization-fragmentation dynamics of argon dimers in intense few-cycle laser pulses with a tagged carrier-envelope phase. We find that a field-driven electron transfer process from one argon atom across the system boundary to the other argon atom triggers subcycle electron-electron interaction dynamics in the neighboring atom. This attosecond electron-transfer process between distant entities and its implications manifests itself as a distinct phase-shift between the measured asymmetry of electron emission curves of the Ar þ þ Ar 2þ and Ar 2þ þ Ar 2þ fragmentation channels. This letter discloses a strong-field route to controlling the dynamics in molecular compounds through the excitation of electronic dynamics on a distant molecule by driving intermolecular electrontransfer processes.

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confidence: 59%

Laser-Induced Electron Transfer in the Dissociative Multiple Ionization of Argon Dimers

Wang

Lai

et al. 2020

Phys. Rev. Lett.

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“…Moreover, while trans -A 2 BC architectures have been extensively studied, including a very recently review (Lu et al, 2018), A 4 β-pyrrolic substituted ones have received less attention, despite the simpler synthetic route and the more hindered structure, appealing for DSSCs.…”

Section: Introductionmentioning

confidence: 99%

Efficient Sunlight Harvesting by A4 β-Pyrrolic Substituted ZnII Porphyrins: A Mini-Review

et al. 2019

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Dye-Sensitized Solar Cells (DSSCs) are a highly promising alternative to conventional photovoltaic silicon-based devices, due to the potential low cost and the interesting conversion efficiencies. A key-role is played by the dye, and porphyrin sensitizers have drawn great interest because of their excellent light harvesting properties mimicking photosynthesis. Indeed, porphyrins are characterized by strong electronic absorption bands in the visible region up to the near infrared and by long-lived π * singlet excited states. Moreover, the presence of four meso and eight β-pyrrolic positions allows a fine tuning of their photoelectrochemical properties through structural modification. Trans -A 2 BC push–pull Zn II porphyrins, characterized by a strong and directional electron excitation process along the push–pull system, have been extensively investigated. On the other hand, A 4 β-pyrrolic substituted tetraaryl Zn II porphyrins, which incorporate a tetraaryl porphyrinic core as a starting material, have received lower attention, even if they are synthetically more attractive and show several advantages such as a more sterically hindered architecture and enhanced solubility in most common organic solvents. The present contribution intends to review the most prominent A 4 β-substituted Zn II porphyrins reported in the literature so far for application in DSSCs, focusing on the strategies employed to enhance the light harvesting capability of the dye and on a comparison with meso -substituted analogs.

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“…Here, we report the synthesis and characterization of a new series of Pzs of A 3 B type, which structure preserves the A unit of TT112 , while the B unit consists of a pyrrole ring connected to a carboxylic acid function either directly, or through linkers of a different nature. The use of different motifs as the B unit allows modulation of the donor–acceptor character of the dye, as well as the distance and the orientation of the acid function with respect to the macrocycle, these characteristics being central in the performance of the dye [ 29 , 30 ]. Push–pull, donor-π-acceptor dyes, containing carboxylic and other polar functions, find applications as photosensitizers in different fields [ 31 , 32 , 33 , 34 , 35 , 36 , 37 ].…”

Section: Introductionmentioning

confidence: 99%

Tuning the Acceptor Unit of Push–Pull Porphyrazines for Dye-Sensitized Solar Cells

et al. 2021

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A family of four push–pull porphyrazines of A3B type, where each unit A contains two peripheral propyl chains and the unit B is endowed with a carboxylic acid, were prepared. The carboxylic acid was attached to the b-position of the pyrrolic unit, either directly (Pz 10), or through cyanovinyl (Pz 11) and phenyl (Pz 7) groups. The fourth Pz (14) consisted in a pyrazinoporphyrazine wherein the dinitrogenated heterocycle provided intrinsic donor–acceptor character to the macrocycle and contained a carboxyphenyl substituent. The direct attachment of the carboxylic acid functions and their linkers to the porphyrazine core produces stronger perturbation on the electronic properties of the macrocycle, with respect to their connection through fused benzene or pyrazine rings in TT112 and 14, respectively. The HOMO and LUMO energies of the Pzs, which were estimated with DFT calculations, show little variation within the series, except upon introduction of the cyanovinyl spacer, which produces a decrease in both frontier orbital energetic levels. This effective interaction of cyanovinyl substitution with the macrocycle is also evidenced in UV/Vis spectroscopy, where a large splitting of the Q-band indicates strong desymmetrization of the Pz. The performance of the four Pzs as photosensitizers in DSSCs were also investigated.

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Push-Pull Zinc Porphyrins as Light-Harvesters for Efficient Dye-Sensitized Solar Cells

Cited by 67 publications

References 152 publications

Laser-Induced Electron Transfer in the Dissociative Multiple Ionization of Argon Dimers

Laser-Induced Electron Transfer in the Dissociative Multiple Ionization of Argon Dimers

Efficient Sunlight Harvesting by A4 β-Pyrrolic Substituted ZnII Porphyrins: A Mini-Review

Tuning the Acceptor Unit of Push–Pull Porphyrazines for Dye-Sensitized Solar Cells

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