Increased Efficiency of Dye‐Sensitized Solar Cells by Incorporation of a π Spacer in Donor–Acceptor Zinc Porphyrins Bearing Cyanoacrylic Acid as an Anchoring Group

Panagiotakis, Stylianos; Giannoudis, Emmanouil; Charisiadis, Asterios; Paravatou, Raphaella; Lazaridi, Maria‐Eleni; Kandyli, Maria; Ladomenou, Kalliopi; Angaridis, Panagiotis A.; Bertrand, Hélène; Sharma, Ganesh D.; Coutsolelos, Athanassios G.

doi:10.1002/ejic.201800123

Cited by 8 publications

(6 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In other papers (Liang et al, 2015; Panagiotakis et al, 2018) a remarkable broadening and a red-shift of the electronic absorption bands of ZnII porphyrins is reported after chemisorption on TiO 2 , with an enhanced light harvesting in the NIR range of wavelengths. Red-shifting of thee Q bands is also evident in the porphyrin 13 , endowed with DTE unit in β-position, upon being adsorbed on TiO 2 photoanode (Di Carlo et al, 2017).…”

Section: A4 β-Pyrrolic Substituted Znii Porphyrins As Light Harvestersmentioning

confidence: 83%

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

et al. 2019

View full text Add to dashboard Cite

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.

show abstract

Section: A4 β-Pyrrolic Substituted Znii Porphyrins As Light Harvestersmentioning

confidence: 83%

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

et al. 2019

View full text Add to dashboard Cite

show abstract

“…As seen with the porphyrazine example, macrocycle-based push-pull chromophores such as phthalocyanines [89-91] (Figure 7) and porphyrins [92][93][94] are good candidates for use as organic dyes within DSSCs and have been extensively studied during the last decades. [105] have reported increased efficiency, with PCE ranging from 5 to 7.6%, using carefully designed zinc porphyrin pushpull derivatives grafted via cyanoacrylic acid on TiO2. Particularly, they showed, using a π-conjugated spacer between the chromophore and the anchoring group, enhanced electron transfer and hindered undesirable aggregation on the TiO2 surface.…”

Section: Sams From Push-pull Chromophores For Dye-sensitized Solar Ce...mentioning

confidence: 99%

“…Cheema et al [106] have obtained near-infrared absorption by conjugating the porphyrin to indolizine as a planar strong electron donor, thus inducing π-π interactions such as head-to-tail dye aggregation (Figure 8). [105] have reported increased efficiency, with PCE ranging from 5 to 7.6%, using carefully designed zinc porphyrin pushpull derivatives grafted via cyanoacrylic acid on TiO 2 . Particularly, they showed, using a π-conjugated spacer between the chromophore and the anchoring group, enhanced electron transfer and hindered undesirable aggregation on the TiO 2 surface.…”

Section: Sams From Push-pull Chromophores For Dye-sensitized Solar Ce...mentioning

confidence: 99%

Self-Assembled Monolayers of Push–Pull Chromophores as Active Layers and Their Applications

Wang,

Gadenne,

Patrone

et al. 2024

Molecules

View full text Add to dashboard Cite

In recent decades, considerable attention has been focused on the design and development of surfaces with defined or tunable properties for a wide range of applications and fields. To this end, self-assembled monolayers (SAMs) of organic compounds offer a unique and straightforward route of modifying and engineering the surface properties of any substrate. Thus, alkane-based self-assembled monolayers constitute one of the most extensively studied organic thin-film nanomaterials, which have found wide applications in antifouling surfaces, the control of wettability or cell adhesion, sensors, optical devices, corrosion protection, and organic electronics, among many other applications, some of which have led to their technological transfer to industry. Nevertheless, recently, aromatic-based SAMs have gained importance as functional components, particularly in molecular electronics, bioelectronics, sensors, etc., due to their intrinsic electrical conductivity and optical properties, opening up new perspectives in these fields. However, some key issues affecting device performance still need to be resolved to ensure their full use and access to novel functionalities such as memory, sensors, or active layers in optoelectronic devices. In this context, we will present herein recent advances in π-conjugated systems-based self-assembled monolayers (e.g., push–pull chromophores) as active layers and their applications.

show abstract

“…However, the experiments confirmed that the presence of a dipole in the spacer did not change the electronic properties of the porphyrin ring. On the other hand, Panagiotakis et al prepared analogous donor–acceptor Zn porphyrins differentiated solely on the incorporation of a π-spacer between the porphyrin core and the cyanoacrylic-acid-anchoring group ( Figure 21 ) [ 91 ]. Both dyes showed favorable HOMO and LUMO electronic distributions and energy levels, as well as similar absorption spectra.…”

Section: Porphyrin Architectural Motifsmentioning

confidence: 99%

Unraveling Structure–Performance Relationships in Porphyrin-Sensitized TiO2 Photocatalysts

Vaz

Pérez‐Lorenzo

2023

Nanomaterials

View full text Add to dashboard Cite

Over the years, porphyrins have arisen as exceptional photosensitizers given their ability to act as chlorophyll-mimicking dyes, thus, transferring energy from the light-collecting areas to the reaction centers, as it happens in natural photosynthesis. For this reason, porphyrin-sensitized TiO2-based nanocomposites have been widely exploited in the field of photovoltaics and photocatalysis in order to overcome the well-known limitations of these semiconductors. However, even though both areas of application share some common working principles, the development of solar cells has led the way in what is referred to the continuous improvement of these architectures, particularly regarding the molecular design of these photosynthetic pigments. Yet, those innovations have not been efficiently translated to the field of dye-sensitized photocatalysis. This review aims at filling this gap by performing an in-depth exploration of the most recent advances in the understanding of the role played by the different structural motifs of porphyrins as sensitizers in light-driven TiO2-mediated catalysis. With this goal in mind, the chemical transformations, as well as the reaction conditions under which these dyes must operate, are taken in consideration. The conclusions drawn from this comprehensive analysis offer valuable hints for the implementation of novel porphyrin–TiO2 composites, which may pave the way toward the fabrication of more efficient photocatalysts.

show abstract

Increased Efficiency of Dye‐Sensitized Solar Cells by Incorporation of a π Spacer in Donor–Acceptor Zinc Porphyrins Bearing Cyanoacrylic Acid as an Anchoring Group

Cited by 8 publications

References 72 publications

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

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

Self-Assembled Monolayers of Push–Pull Chromophores as Active Layers and Their Applications

Unraveling Structure–Performance Relationships in Porphyrin-Sensitized TiO2 Photocatalysts

Contact Info

Product

Resources

About