The importance of various anchoring groups attached on porphyrins as potential dyes for DSSC applications

Ladomenou, Kalliopi; Kitsopoulos, Theofanis N.; Sharma, Ganesh D.; Coutsolelos, Athanassios G.

doi:10.1039/c4ra00985a

Cited by 128 publications

(66 citation statements)

References 121 publications

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“…Until recently, the great majority of sensitizers used in DSSCs have been endowed mostly with carboxylic acid or cyanoacrylic acid moieties acting both as electron‐acceptor units and anchoring groups for attachment to TiO 2 surfaces. The search for novel anchoring groups that bind better than conventional carboxylic acids to the TiO 2 surface is a topic of intense research . In 2011 Ooyama et al.…”

Section: Figurementioning

confidence: 99%

Pyridyl‐ and Picolinic Acid Substituted Zinc(II) Phthalocyanines for Dye‐Sensitized Solar Cells

et al. 2017

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A series of tri‐tert‐butyl zinc(II) phthalocyanines (Pcs) substituted with pyridyl, carboxyl, or picolinic acid anchoring groups on the periphery were prepared. Photovoltaic (PV) studies on these dyes were carried out revealing some interesting features. In the case of the pyridyl‐substituted Pcs, the PV properties were found to depend strongly on the the pyridyl substitution pattern (meta or para) and the number of pyridyl units at the macrocycle's periphery (one or two). For these four pyridyl‐substituted Pcs, higher photovoltaic efficiencies were obtained for 1) the para‐ versus the meta‐substituted Pcs, and 2) the mono‐ versus the bis‐functionalized dyes. In order to improve the poor adsorption of the pyridyl‐substituted Pcs onto TiO2, a new dye was tested bearing a picolinic acid unit. This moiety combines a carboxylic acid function, as a strong anchoring group for binding to TiO2, with an electron‐withdrawing nitrogen atom for better electron injection into the semiconductor's conduction band. For this latter system, an improvement in the PV efficiency up to 2.1 % was obtained.

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Section: Figurementioning

confidence: 99%

Pyridyl‐ and Picolinic Acid Substituted Zinc(II) Phthalocyanines for Dye‐Sensitized Solar Cells

et al. 2017

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“…11,[21][22][23][24][25] Among other small molecules that could function as electron donors in OSCs are porphyrins -the synthetic analogues of chlorophylls -are of special interest, since they are known to model nature's choice aslight harvesting antennae systems that are involved in energy and electron transfer processes in many biological systems. 28,29 Despite the successful use of porphyrins as sensitizers in dye-sensitized solar cells (DSSCs) [30][31][32][33] (devices with PCE values higher than 12% have been reported), their utilization as donors in solution-processed BHJ organic solar cells is rather limited because of their poor solubility in common organic solvents. 28,29 Despite the successful use of porphyrins as sensitizers in dye-sensitized solar cells (DSSCs) [30][31][32][33] (devices with PCE values higher than 12% have been reported), their utilization as donors in solution-processed BHJ organic solar cells is rather limited because of their poor solubility in common organic solvents.…”

Section: Introductionmentioning

confidence: 99%

A mono(carboxy)porphyrin-triazine-(bodipy)₂triad as a donor for bulk heterojunction organic solar cells

et al. 2015

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In the present article bulk heterojunction (BHJ) solution processed organic solar cells have been prepared using mono(carboxy)porphyrin-triazine-(Bodipy) 2 triad (PorCOOH)(BDP) 2 as a donor and ([6,6]-phenyl C 71 butyric acid methyl ester) (PC 71 BM) as an acceptor. This donor/acceptor system aims at the of increasing the light capturing process efficiency of the device. The solution processed BHJ organic solar cell with an optimized weight ratio of 1:1 (PorCOOH)(BDP) 2 :PC 71 BM processed with THF as a solvent showed an overall power conversion efficiency (PCE) of 3.48 % with short circuit current J sc = 8.04 mA/cm 2 , open circuit voltage V oc = 0.94 V and fill factor FF =0.46. The relatively high value of V oc was attributed to the deeper highest occupied molecular orbital energy level of (PorCOOH)(BDP) 2 . When the active layer of the solar cell was processed from a mixture of 4% v/v of pyridine in THF solvent, it achieved a PCE value of 5.29 % with J sc =10.48 mA/cm 2 , V oc =0.90 V and FF=0.56. This was ascribed to the enhancement of both the J sc and the FF values. The higher value of J sc is explained by the increased absorption profile of the blend, the stronger incident photon to current efficiency (IPCE) response and the higher crystallinity of the active layer, induced by the solvent additive while the enhancement of FF may be due to the better charge transport capability and the charge collection efficiency in the later device.

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“…[1][2][3][4][5][6][7][8][9][10][11][12] To develop high-performance DSSCs with long-term stability, it is important to create efficient dye sensitizers, chemically and environmentally stable electrolytes, and a suitable nanocrystalline TiO 2 electrode for the dye sensitizers. [1][2][3][4][5][6][7][8][9][10][11][12] To develop high-performance DSSCs with long-term stability, it is important to create efficient dye sensitizers, chemically and environmentally stable electrolytes, and a suitable nanocrystalline TiO 2 electrode for the dye sensitizers.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10][11][12] To develop high-performance DSSCs with long-term stability, it is important to create efficient dye sensitizers, chemically and environmentally stable electrolytes, and a suitable nanocrystalline TiO 2 electrode for the dye sensitizers. [6][7][8][9] On the other hand, a new type of D-π-A dye sensitizers with 4pyridyl groups as electron-withdrawing anchoring groups have been designed and developed by some research groups. These are one of the most promising classes of organic dye sensitizers, because D-π-A dye sensitizers with electron-donating (D) and electron-accepting (A) groups linked by π-conjugated bridges have broad and intense absorption spectral features.…”

Section: Introductionmentioning

confidence: 99%

Development of D–π–A Fluorescent Dyes with a 3‐Pyridyl Group as Electron‐Withdrawing Anchoring Group for Dye‐Sensitized Solar Cells

2015

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D–π–A and (D–π–)2A fluorescent dyes (OUY‐1 and OUY‐2) with a 3‐pyridyl group as an electron‐withdrawing anchoring group have been newly developed as photosensitizers for dye‐sensitized solar cells (DSSCs). We found that both dyes OUY‐1 and OUY‐2 were adsorbed onto a TiO2 electrode through the formation of pyridinium ions and/or hydrogen bonding of the pyridyl group with the Brønsted‐acidic sites on the TiO2 surface. However, D–π–A dye NI‐6, with a 4‐pyridyl group, was predominantly adsorbed onto the TiO2 surface through coordinate bonding between the pyridyl group and the Lewis‐acidic sites on the TiO2 surface. The photovoltaic performance of DSSC based on dye OUY‐1 is comparable to that of the dye NI‐6. On the other hand, the photovoltaic performance of DSSC based on dye OUY‐2 is much lower than that of the dye OUY‐1. This work revealed that the binding mode of D–π–A dyes with pyridyl groups on the TiO2 surface can be changed by control of the basicity and electron density of pyridyl groups.

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The importance of various anchoring groups attached on porphyrins as potential dyes for DSSC applications

Abstract: The influence of different anchoring groups in the efficiency of porphyrin dye sensitized solar cells.

Cited by 128 publications

References 121 publications

Pyridyl‐ and Picolinic Acid Substituted Zinc(II) Phthalocyanines for Dye‐Sensitized Solar Cells

Pyridyl‐ and Picolinic Acid Substituted Zinc(II) Phthalocyanines for Dye‐Sensitized Solar Cells

A mono(carboxy)porphyrin-triazine-(bodipy)₂triad as a donor for bulk heterojunction organic solar cells

Development of D–π–A Fluorescent Dyes with a 3‐Pyridyl Group as Electron‐Withdrawing Anchoring Group for Dye‐Sensitized Solar Cells

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The importance of various anchoring groups attached on porphyrins as potential dyes for DSSC applications

Abstract: The influence of different anchoring groups in the efficiency of porphyrin dye sensitized solar cells.

Cited by 128 publications

References 121 publications

Pyridyl‐ and Picolinic Acid Substituted Zinc(II) Phthalocyanines for Dye‐Sensitized Solar Cells

Pyridyl‐ and Picolinic Acid Substituted Zinc(II) Phthalocyanines for Dye‐Sensitized Solar Cells

A mono(carboxy)porphyrin-triazine-(bodipy)2triad as a donor for bulk heterojunction organic solar cells

Development of D–π–A Fluorescent Dyes with a 3‐Pyridyl Group as Electron‐Withdrawing Anchoring Group for Dye‐Sensitized Solar Cells

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A mono(carboxy)porphyrin-triazine-(bodipy)₂triad as a donor for bulk heterojunction organic solar cells