Aqueous Electrolytes Based Dye-sensitized Solar Cells using I-/I3-Redox Couple to Achieve ≥ 4% Power Conversion Efficiency

Choi, Hyeju; Han, Jinjoo; Kang, Moon‐Sung; Song, Kihyung; Ko, Jaejung

doi:10.5012/bkcs.2014.35.5.1433

Cited by 16 publications

(11 citation statements)

References 39 publications

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“…241 As clearly visible in Table 14 (Table 12) showed that V oc gradually increased with the incremental addition of water (i.e., from 0 to 50%); in contrast, J sc sharply decreased under the same conditions. Again, dyes were found to easily detach due to their partial hydrophilic nature, resulting in the reduction of both photocurrent and efficiency.…”

Section: Photoanode Activation: a Way To Improve The Interfacial Charmentioning

confidence: 84%

“…Ko and coworkers further investigated aqueous DSSCs using three different organic sensitizers, namely D5L6, 239 D21L6 240 and JK-310; in particular, the latter two contained (hexyloxy)phenylamine and 4-(2-(2-methoxyethoxy)-ethoxy)phenylamine as electron donor units. 241 As clearly visible in Table 14, all of these dyes have a water-soluble substituent and were coupled with an aqueous electrolyte (PMII 2.0 M, I 2 50 mM, GuSCN 0.10 M, TBP 0.50 M and Triton X-100 1 wt% in MPN : H 2 O 50 : 50). PV measurements (Table 12) showed that V oc gradually increased with the incremental addition of water (i.e., from 0 to 50%); in contrast, J sc sharply decreased under the same conditions.…”

Section: Photoanode Activation: a Way To Improve The Interfacial Char...mentioning

confidence: 99%

“…Electrolytes: PMII 2.0 M, I 2 50 mM, GuSCN 0.10 M, TBP 0.50 M and Triton X-100 1 wt% in MPN or MPN/H 2 O. Adapted and reprinted from ref 241.…”

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Aqueous dye-sensitized solar cells

et al. 2015

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Nowadays, dye-sensitized solar cells (DSSCs) are the most extensively investigated systems for the conversion of solar energy into electricity, particularly for implementation in devices where low cost and good performance are required. Nevertheless, a key aspect is still to be addressed, being considered strongly harmful for a long time, which is the presence of water in the cell, either in the electrolyte or at the electrode/electrolyte interface. Here comes the present review, in the course of which we try our best to address the highly topical role of water in DSSCs, trying to figure out if it is a poisoner or the keyword to success, by means of a thoroughly detailed analysis of all the established phenomena in an aqueous environment. Actually, in the last few years the scientific community has suddenly turned its efforts in the direction of using water as a solvent, as demonstrated by the amount of research articles being published in the literature. Indeed, by means of DSSCs fabricated with water-based electrolytes, reduced costs, non-flammability, reduced volatility and improved environmental compatibility could be easily achieved. As a result, an increasing number of novel electrodes, dyes and electrolyte components are continuously proposed, being highly challenging from the materials science viewpoint and with the golden thread of producing truly water-based DSSCs. If the initial purpose of DSSCs was the construction of an artificial photosynthetic system able to convert solar light into electricity, the use of water as the key component may represent a great step forward towards their widespread diffusion in the market.

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Section: Photoanode Activation: a Way To Improve The Interfacial Charmentioning

confidence: 84%

Section: Photoanode Activation: a Way To Improve The Interfacial Char...mentioning

confidence: 99%

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Aqueous dye-sensitized solar cells

et al. 2015

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“…Such groups have already been employed in the preparation of dyes for water-based DSSCs. 46,47 Conversely, BB2d had two hydrophobic n-hexyloxy substituents on the donor. In addition, dye BB2a' was also prepared to check the effect of having a single alkyl chain on a ProDOT moiety and directly compare the results obtained with those of dyes BB1a and BB2a.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Tuning the Properties of Benzothiadiazole Dyes for Efficient Visible Light-Driven Photocatalytic H₂ Production under Different Conditions

Bartolini

Gombac

Sinicropi

et al. 2020

ACS Appl. Energy Mater.

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Photocatalytic hydrogen production has recently emerged as a promising process for the long-term storage of solar energy. In this work, we studied the application of a series of heterogeneous photocatalysts obtained by sensitizing Pt/TiO2 nanoparticles with 10 different D-π-A organic dyes containing the benzo[c][1,2,5]thiadiazole (BTD) heterocyclic moiety in H2 generation. Starting from the known DSSC sensitizer RK-1, our approach involved the systematic and simultaneous alteration of several important structural features, such as steric bulk and hydrophobicity/hydrophilicity in different parts of the molecules, giving rise to a set of compounds with diverse physico-chemical properties. Visible light-driven H2 generation studies conducted with the dye-sensitized photocatalysts together with different sacrificial electron donors (SEDs) revealed that both their overall hydrogen production efficiency and their relative order of performances could be altered by the choice of SED and the corresponding reaction conditions. In particular, the best results were obtained with dyes having a strongly hydrophobic central core and a hydrophilic donor section in combination with ascorbic acid as the electron donor. In addition, the effect of changing the dye loading and extending the reaction time was examined, resulting in a stable three-component photocatalytic system displaying high activity up to 72 h of experiment.

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“…The low efficiently of the first cycle may be due to undischarged species remaining (Figure S5). The overall limiting factor in this system is the solar energy conversion due to the lesser developed aqueous dye-sensitized solar cell (DSSC) field with efficiencies generally less than 5% , compared to nonaqueous DSSCs which have much higher efficiencies of >10%. Previously, the extreme conditions typically employed in aqueous RFBs have deterred use with DSSCs …”

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pH-Tuning a Solar Redox Flow Battery for Integrated Energy Conversion and Storage

McCulloch

2016

ACS Energy Lett.

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Experimental DetailsFlow Battery Measurements All flow battery electrochemical measurements were performed using a commercial Scribner redox flow cell with an active area of 5 cm 2 . The I3 -/Ibased catholyte was circulated using a PTFE diaphragm pump (Cole-Parmer) and PTFE tubing. The anthraquinone-2,7-disulfonic acid (AQDS, TCI) anolyte was circulated using a peristaltic pump (Cole-Parmer) and PTFE tubing (except at the pump head where flexible silicone tubing is required for pump operation). Both the anolyte and catholyte were circulated at a flow rate of 40 mL/min. An nitrogen atmosphere was maintained above the electrolytes to prevent oxidation of the AQDS. Nafion 212 membranes (DuPont) were used as the cation exchange membrane to separate the positive and negative electrolytes. The Nafion membranes were pretreated prior to use according to the following procedure: (1) stirred in a deionized (DI) water bath at ~ 80 o C for 30 mins. (2) stirred in a 3% H2O2 aqueous solution at ~ 80 o C for 45 mins. (3) washed with DI water (4) stirred in a 0.5 M H2SO4 solution at ~ 80 o C for 1 hour. (5) washed and stored in DI water until use. Carbon felt GFD 4.6 mm (SGL Carbon) was used for both electrodes. Flow battery cycling was conducted using a maccor model 4304 battery tester with a current density of 50 mA (10 mA/cm 2 ) unless otherwise stated. The pH of the flow battery electrolyte was

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Aqueous Electrolytes Based Dye-sensitized Solar Cells using I^-/I₃^-Redox Couple to Achieve ≥ 4% Power Conversion Efficiency

Cited by 16 publications

References 39 publications

Aqueous dye-sensitized solar cells

Aqueous dye-sensitized solar cells

Tuning the Properties of Benzothiadiazole Dyes for Efficient Visible Light-Driven Photocatalytic H₂ Production under Different Conditions

pH-Tuning a Solar Redox Flow Battery for Integrated Energy Conversion and Storage

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Aqueous Electrolytes Based Dye-sensitized Solar Cells using I-/I3-Redox Couple to Achieve ≥ 4% Power Conversion Efficiency

Cited by 16 publications

References 39 publications

Aqueous dye-sensitized solar cells

Aqueous dye-sensitized solar cells

Tuning the Properties of Benzothiadiazole Dyes for Efficient Visible Light-Driven Photocatalytic H2 Production under Different Conditions

pH-Tuning a Solar Redox Flow Battery for Integrated Energy Conversion and Storage

Contact Info

Product

Resources

About

Aqueous Electrolytes Based Dye-sensitized Solar Cells using I^-/I₃^-Redox Couple to Achieve ≥ 4% Power Conversion Efficiency

Tuning the Properties of Benzothiadiazole Dyes for Efficient Visible Light-Driven Photocatalytic H₂ Production under Different Conditions