New pyridyl-based dyes for co-sensitization in dye sensitized solar cells

Nehme, Vanessa A. El Bitar; Nehme, Mélissa El Bitar; Ghaddar, Tarek H.

doi:10.1016/j.solener.2019.05.037

Cited by 25 publications

(9 citation statements)

References 17 publications

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“…These observations may be rationalized by the weaker antiaggregation ability of the m - tert -butyl moieties compared with that of the ortho -alkoxy chains, which results in faster charge recombination and lower photovoltaic performance. ,− On the other hand, when N1 was used as a dye to fabricate DSSCs, very poor J SC (0.27 mA·cm –2 ) and low efficiency (0.27%) was obtained. Considering the weak binding capacity of the pyridyl group on TiO 2 , the poor efficiency observed for N1 may be related to the small dye loading amount . Thus, we have measured the corresponding data, and the results are shown in Table S1.…”

Section: Resultsmentioning

confidence: 87%

“…Considering the weak binding capacity of the pyridyl group on TiO 2 , the poor efficiency observed for N1 may be related to the small dye loading amount. 58 Thus, we have measured the corresponding data, and the results are shown in Table S1. As expected, the dye loading amount of N1 (0.09 × 10 −7 mol•cm −2 ) is much lower than that of XW64 (1.8 × 10 −7 mol•cm −2 ).…”

Section: T H Imentioning

confidence: 84%

“…One essential challenge for developing efficient porphyrin-based dye-sensitized solar cells is how to suppress the dye aggregation. − In this respect, one of the most effective approaches is the introduction of flexible alkoxy and alkyl chains into porphyrin dyes to wrap or strap the porphyrin macrocycle. , Very recently, Balanay et al demonstrated that the axial coordination of a pyridyl ligand with zinc porphyrin also can effectively suppress the aggregation . On the other hand, the pyridyl moiety has been used as the anchoring unit for designing DSSC dyes. , …”

Section: Introductionmentioning

confidence: 99%

“…57 On the other hand, the pyridyl moiety has been used as the anchoring unit for designing DSSC dyes. 58,59 On the basis of the aforementioned background, we envision that if a pyridyl ligand with an absorption peak around 500 nm is used for the axial coordination to a porphyrin dye, it may simultaneously suppress the dye aggregation and compensate the porphyrin absorption defect like a cosensitizer, 34,43 which may be promising for developing high-performance DSSCs. Thus, we herein report the design of a pyridine derivative N1 for axial coordination with porphyrin dyes (Figure 1).…”

Section: ■ Introductionmentioning

confidence: 99%

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Light-Absorbing Pyridine Derivative as a New Electrolyte Additive for Developing Efficient Porphyrin Dye-Sensitized Solar Cells

Zou

Yan

et al. 2020

ACS Appl. Mater. Interfaces

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To fabricate efficient dye-sensitized solar cells (DSSCs), 4-tertbutylpyridine (TBP) is commonly used as an additive in the electrolytes for improving the photovoltages (V OC ). However, TBP cannot play a positive role in improving the photocurrent (J SC ) because of the lack of absorption in the visible-wavelength range. We herein report a light-absorbing pyridine derivative N1 as an additive for the axial coordination with porphyrin dyes. N1 was synthesized by introducing a (bis(4-methoxyphenyl)amino)anthryl moiety into the para-position of pyridine via an acetylene bridge, and porphyrin dye XW64 containing meso-3,5-disubstituted phenyl groups was synthesized considering that the meta-substituted phenyl groups may induce weaker steric hindrance with the axial pyridyl ligand, as compared with wrapped and strapped porphyrin dyes. Thus, N1 was used as an electrolyte additive together with TBP. When optimized concentrations of 6 mM N1 and 0.5 M TBP were used for fabricating DSSCs based on XW64, enhanced photovoltaic performance was achieved, with J SC , V OC , and efficiency of 15.65 mA•cm −2 , 0.701 V, and 7.35%, respectively, superior to those of the corresponding DSSCs without using the additives (J SC = 14.86 mA•cm −2 , V OC = 0.599 V, and efficiency = 5.94%). The enhancement of J SC can be ascribed to the improved light-harvesting ability induced by the axially coordinated N1. Furthermore, the two additives also can be used to fabricate efficient solar cells based on the wrapped porphyrin dye XW42, achieving high efficiency of 10.3%, indicative of their general applicability in fabricating high-performance DSSCs. These results indicate that the simultaneous employment of the traditional TBP additive and a pyridyl ligand with light-harvesting ability in the electrolyte for the axial coordination to a porphyrin dye is a promising approach for developing efficient DSSCs.

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Section: Resultsmentioning

confidence: 87%

Section: T H Imentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Light-Absorbing Pyridine Derivative as a New Electrolyte Additive for Developing Efficient Porphyrin Dye-Sensitized Solar Cells

Zou

Yan

et al. 2020

ACS Appl. Mater. Interfaces

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“…As a result, a variety of organic co-sensitizers have been created to overcome ruthenium dye's poor ultraviolet and visible light utilization, and these co-sensitization DSSCs displayed improved efficiencies. 54,[59][60][61][62] Younas et al 63 developed a co-sensitized device using Z907, a ruthenium dye, and SQ2, an organic sensitizer, with a 7.83% overall efficiency. Senadeera et al 64 used Eosin-Y and Rose Bengal dyes for the co-sensitization and got the highest efficiency of 2.09%.…”

Section: Introductionmentioning

confidence: 99%

The improved performance of dye‐sensitized solar cells using co‐sensitization and polymer gel electrolyte

Selvakumar

2022

Intl J of Energy Research

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To investigate the photovoltaic capabilities as a sensitizer and co-sensitizer for dye-sensitized solar cells (DSSCs), a new metal-free organic dye (CDIB) was synthesized. In addition, different concentrations of 1-n-hexyl-3-methylimidazolium iodide ionic liquid (IL) doped poly(vinylidene fluoride-hexafluoropropylene) gel polymer electrolytes are prepared and the high conductive electrolyte is used to fabricate the devices. The device having CDIB sensitizer and IL-15% electrolyte showed an efficiency of 1.86%. Further, the effect of CDIB co-sensitization on Z907 is examined. Consequently, the power conversion efficiency of DSSC with co-sensitized dye is raised by 23.29%, from 4.55 to 5.61%, when compared to DSSCs with individual dyes. This improvement is mostly due to an increase in a short-circuit current density and open-circuit voltage. Highlights• Co-sensitization is being used to enhance the performance of DSSCs.• Poly(vinylidene fluoride-hexafluoropropylene)-based gel polymer electrolytes doped with different amounts of 1-n-hexyl-3-methylimidazolium iodide were prepared for improving the conductivity of electrolyte.• A co-sensitized DSSC has an efficiency of 5.61%.• With co-sensitization, both V OC and J SC increased significantly.

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New organic dyes with varied arylamine donors as effective co-sensitizers for ruthenium complex N719 in dye sensitized solar cells

Song

Liu

et al. 2020

Journal of Power Sources

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New pyridyl-based dyes for co-sensitization in dye sensitized solar cells

Cited by 25 publications

References 17 publications

Light-Absorbing Pyridine Derivative as a New Electrolyte Additive for Developing Efficient Porphyrin Dye-Sensitized Solar Cells

Light-Absorbing Pyridine Derivative as a New Electrolyte Additive for Developing Efficient Porphyrin Dye-Sensitized Solar Cells

The improved performance of dye‐sensitized solar cells using co‐sensitization and polymer gel electrolyte

New organic dyes with varied arylamine donors as effective co-sensitizers for ruthenium complex N719 in dye sensitized solar cells

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