Design and characterization of alkoxy-wrapped push–pull porphyrins for dye-sensitized solar cells

Ripolles, Teresa S.; Guo, Bo Cheng; Wu, Hui; Pan, Tsung Yu; Lee, Hsuan-Wei; Raga, Sonia R.; Fabregat‐Santiago, Francisco; Bisquert, Juan; Yeh, Chih-Hung; Diau, Eric Wei Guang

doi:10.1039/c2cc31111a

Cited by 109 publications

(80 citation statements)

References 25 publications

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“…The crude product was purified by column chromatography (silica gel) using CH 2 Cl 2 /CH 3 OH = 10/1 as eluent and recrystallized from CH 3 OH/CH 2 Cl 2 to yield pure zinc porphyrin dyes (40%−60%) as a green solid. 13 Photovoltaic Device Fabrication. The TiO 2 paste containing poly(ethylene glycol) and triton X-100 in a proportion of 33% weight was coated onto a commercial fluorine−tin-oxide (FTO) by vacuum spin-coater.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Strategy to Improve Photovoltaic Performance of DSSC Sensitized by Zinc Prophyrin Using Salicylic Acid as a Tridentate Anchoring Group

Gou

Jiang

Fang

et al. 2014

ACS Appl. Mater. Interfaces

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Three new zinc porphyrin dyes attached to ethynyl benzoic acid as an electron transmission and anchoring group have been designed, synthesized, and well-characterized. The performances of their sensitized solar cells have been investigated by optical, photovoltaic, and electrochemical methods. The photoelectric conversion efficiency of the solar cells sensitized by the dye with salicylic acid as an anchoring group demonstrated obvious enhancement when compared with that sensitized by the dye with carboxylic acid as an anchoring group. The density functional theory calculations and the electrochemical impedance spectroscopies revealed that tridentate binding modes could increase the efficiency of electron injection from dyes to the TiO2 nanoparticles by more electron pathways.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Strategy to Improve Photovoltaic Performance of DSSC Sensitized by Zinc Prophyrin Using Salicylic Acid as a Tridentate Anchoring Group

Gou

Jiang

Fang

et al. 2014

ACS Appl. Mater. Interfaces

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“…[14][15][16][17] Although the absorption spectrum of YD2-oC8 covers almost the entire visible spectral region, 400-700 nm, the lack of light-harvesting ability beyond 700 nm (near-IR) limits the efficiency of power conversion (PCE) of the device. One strategy to extend the light-harvesting capability of a porphyrin toward the near-IR region is to couple two porphyrin macrocycles through an ethynyl linker, for which the spectra of incident photon-to-current conversion efficiency (IPCE) of the diporphyrin systems were extended to 850 nm.…”

Section: Introductionmentioning

confidence: 99%

Molecular engineering of cocktail co-sensitization for efficient panchromatic porphyrin-sensitized solar cells

Pan

et al. 2012

Energy Environ. Sci.

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148

102

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Co-sensitization of two or more dyes with complementary absorption spectra on a semiconductor film is an effective approach to enhance the performance of a dye-sensitized solar cell (DSSC). Porphyrin sensitizer YD2-oC8 showed outstanding photovoltaic performance co-sensitized with an organic dye to cover the entire visible spectral region, 400–700 nm. To promote the light-harvesting capability beyond 700 nm, a porphyrin dimer (YDD6) was synthesized for a co-sensitized system. We report a systematic approach for engineering of molecular co-sensitization of TiO2 films in a cocktail solution containing YD2-oC8, an organic dye (CD4) and YDD6 in a specific molar ratio to optimize the photovoltaic performance of the device. The resulting device showed panchromatic spectral features in the IPCE action spectrum in the region 400–700 nm attaining efficiencies of 75–80%; the spectrum is extended to the near-IR region attaining 40–45% in 700–800 nm region, giving JSC/mA cm 2 ¼ 19.28, VOC/mV ¼ 753, FF ¼ 0.719, and h ¼ 10.4% under standard AM 1.5 G one-sun irradiation. This performance is superior to what is obtained from the individual single-dye devices and the two-dye co-sensitized systems. The shifts of TiO2 potential upon dye uptake and the kinetics of charge recombination were examined through measurements of the charge extraction (CE) and intensity-modulated photovoltage spectroscopy (IMVS), respectively. Five co-sensitized systems were investigated to demonstrate that suppression of dye aggregation of YDD6 in the co-sensitized film is a key factor to further improve the device performance

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“…This was due to the floppy structural nature and limited molecular rigidity of the cyanoacrylic acid anchor which might lead the porphyrins to tilt down the TiO 2 surface for an efficient charge recombination to occur. 114,115 …”

Section: Cyanoacrylic Acidsmentioning

confidence: 98%

Strategic Synthetic Approaches to Porphyrin-Based Artificial Light-Harvesting Systems for Solar Energy Utilization

Coutsolelos¹,

Ladomenou²,

Charalambidis³

et al. 2014

Handbook of Porphyrin Science

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Design and characterization of alkoxy-wrapped push–pull porphyrins for dye-sensitized solar cells

Cited by 109 publications

References 25 publications

Strategy to Improve Photovoltaic Performance of DSSC Sensitized by Zinc Prophyrin Using Salicylic Acid as a Tridentate Anchoring Group

Strategy to Improve Photovoltaic Performance of DSSC Sensitized by Zinc Prophyrin Using Salicylic Acid as a Tridentate Anchoring Group

Molecular engineering of cocktail co-sensitization for efficient panchromatic porphyrin-sensitized solar cells

Strategic Synthetic Approaches to Porphyrin-Based Artificial Light-Harvesting Systems for Solar Energy Utilization

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