The investigation of the central metal effects on the porphyrin-based DSSCs performance; molecular approach

Arkan, Foroogh; Izadyar, Mohammad

doi:10.1016/j.matchemphys.2017.04.054

Cited by 31 publications

(17 citation statements)

References 73 publications

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“…3 More recently, the development of porphyrin-based dyes has revitalised research in metal-incorporating dyes, due to the employment of less expensive metals (such as Zn, instead of Ru), their synthetically tunable optical properties and good photostability. [4][5][6] In particular, the position of these bands, together with the redox properties, 7,8 can be tuned through the insertion of a metal in the central cavity 9 and through the substitution of the porphyrin periphery, which can be done by functionalising the β-positions and the meso-positions. While zinc is the most preferred metal due to its low-cost and ability to broaden the optical absorption of porphyrins, 10 the types of substituent that could be added to the peripheral positions to tune the properties of porphyrin derivatives is enormous.…”

Section: Introductionmentioning

confidence: 99%

An investigation of the roles furan versus thiophene π-bridges play in donor–π-acceptor porphyrin based DSSCs

et al. 2018

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Dye-sensitized solar cells (DSSCs) continue to attract interest due to their lower cost production compared to silicon based solar cells and their improving power conversion efficiencies. Porphyrin-based sensitizers have become an important sub-class due to their strong absorption characteristics in the visible region, convenient modulation of properties through synthetic manipulation and class-leading power conversion efficiencies. In this article, we report the synthesis and characterization of two porphyrin-based dyes and their application as sensitizers in DSSCs. A thiophene and a furan moiety have been incorporated into the push-pull architecture as a π-bridge, allowing the systematic investigation of how these moieties influence the physical properties of the dyes and the performance of their resulting DSSCs. A significant difference in PCEs has been observed, with the furan containing dye (PorF, PCE = 4.5%) being more efficient than the thiophene-based analogue (PorT, PCE = 3.6%) in conjunction with the iodide/triiodide redox electrolyte.

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Section: Introductionmentioning

confidence: 99%

An investigation of the roles furan versus thiophene π-bridges play in donor–π-acceptor porphyrin based DSSCs

et al. 2018

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“…Metal center of metalloporphyrins can strongly affect the catalytic activity of porphyrin-based catalysts and among the various transition metals, iron and manganese porphyrins can display notable catalytic efficiency for the oxidation reactions. [46][47][48] The importance of the nature of catalyst support and metal center of porphyrin on the catalytic efficiency of nanohybrids for aerobic oxidation of alcohols was investigated in the oxidation of benzyl alcohol on the optimal conditions (see footnote Figure 6) and the results are shown in Figure 7.…”

Section: Chemistryselectmentioning

confidence: 99%

Comparison of the Two Carbon Allotropes as Solid Support: Catalytic Efficiency of the Supported Metalloporphyrins for the Aerobic Oxidation of Alcohols

Nejabat

Rayati

2022

ChemistrySelect

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In the present research, a new method for the aerobic oxidation of aromatic and cyclic aliphatic alcohols to the corresponding aldehydes or ketone was developed in the presence of two supported metalloporphyrins. The prepared heterogenized catalysts were fully characterized by transmission electron microscopy (TEM), scanning electron microscope (SEM), thermogravimetric analysis (TGA), atomic absorption spectroscopy (AAS), Fourier Transform Infrared (FT‐IR) and Ultra Violet‐Visible (UV‐Vis) spectroscopy. The role of structural and textural properties of carbon‐based materials as solid support on the catalytic efficiency of the supported catalysts was compared with each other and the results shows higher efficiency of the supported Fe‐porphyrin on multi‐walled carbon nanotube [Fe(THPP)Cl/MWCNT] compared to the anchored Fe‐porphyrin on the graphene oxide [Fe(THPP)Cl/GO]. The study on the aerobic oxidation of alcohols in the presence of the supported Fe‐porphyrins proved that the addition of isobutyraldehyde as reducing agent in several portions during the catalytic reaction significantly increased the product yields. The separation and recovery of the nanocatalyst was simple, effective and economical in this green oxidation method and the supported catalyst can reuse at least eight times without significant loss of activity.

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“…For about three decades, the research into dye-sensitized solar cells (DSSCs) has been intense due to its flexibility, low production cost and biodegradability [ 6 , 7 ]. The five components of DSSCs include a mesoporous oxide semiconductor layer, a transparent conducting glass substrate, redox electrolyte, a counter electrode and a dye sensitizer [ 8 , 9 ]. However, dye sensitizer plays the foremost role of light absorption, stability, charge separation, charge injection, conversion of incident light into photocurrent, light-harvesting efficiency and the overall power conversion efficiency [ 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…Majorly, there are two types of sensitizers; metal-free organic dyes and metal complex sensitizers. Researches have shown that the DSSCs based on metal-complex sensitizers exhibit slightly higher efficiency than those of metal-free organic sensitizers [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. However, the metal-complex sensitizers have limited resources, low molar extinction coefficient and high cost, which limit their industrial applications [ 12 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Electronic and optical properties’ tuning of phenoxazine-based D-A2-π-A1 organic dyes for dye-sensitized solar cells. DFT/TDDFT investigations

Afolabi

Semire

Idowu

2021

Heliyon

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Modulation of molecular features of metal free organic dyes is important to present sensitizers with competing electronic and optical properties for dye sensitized solar cells (DSSCs). The D-A 2 -π-A 1 molecular design based on phenothiazine skeleton (D) connected with benzothiadiazole (A 2 ) linked with furan π-spacer and acceptor unit of cynoacrylic acid (A 1 ) were fabricated and examined theoretically for possible use as DSSCs. Density functional theory (DFT) and time dependent density functional theory TDDFT were used to study the effect of additional donors on the photophysical properties of the dyes. Eight (8) different donor subunits were introduced at C7 of phenoxazine based dye skeleton to extend the π-conjugation, lower HOMO-LUMO gap (E g ) and improve photo-current efficiency of the dye sensitizer. All the dye sensitizers (except P3 and P4) exhibited capability of injecting electrons into the conduction band of the semiconductor (TiO 2 ) and regenerated via redox potential (I − /I 3 - ) electrode. Attachment of 2-hexylthiophene (P2) remarkably lowered the E g , extended π-electron delocalization, hence, gives higher absorption wavelength (λ max ) at 752 nm. The donor subunit containing 2-hexylthiophene (P2) presented the best chemical hardness, open circuit voltage (V oc ), and other comparable electronic properties, making P2 the best DSSC candidate amongst the optimized dyes. The reported dyes would be interesting for further experimental research.

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The investigation of the central metal effects on the porphyrin-based DSSCs performance; molecular approach

Cited by 31 publications

References 73 publications

An investigation of the roles furan versus thiophene π-bridges play in donor–π-acceptor porphyrin based DSSCs

An investigation of the roles furan versus thiophene π-bridges play in donor–π-acceptor porphyrin based DSSCs

Comparison of the Two Carbon Allotropes as Solid Support: Catalytic Efficiency of the Supported Metalloporphyrins for the Aerobic Oxidation of Alcohols

Electronic and optical properties’ tuning of phenoxazine-based D-A2-π-A1 organic dyes for dye-sensitized solar cells. DFT/TDDFT investigations

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