Graphene oxide enabled hole transport characteristics in iodide/tri-iodide for improved dye sensitized solar cell performance

Krishnan, Divya; Powar, Niket S.; Vasanth, Arya; Ramanathan, Kulandai Velu; Nair, Shantikumar V.; Shanmugam, Mariyappan

doi:10.1016/j.matlet.2020.129176

Cited by 7 publications

(4 citation statements)

References 14 publications

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“…Based on Table III, the conductivity of 0.05% addition of graphite was increased by more than 100% compared to the 0% graphite [34]. It seems that graphite was used as an electron transfer material.…”

Section: B Fabrication Of Dssc Prototype Based On Graphite Waste Disp...mentioning

confidence: 93%

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Ionic Liquids Based Cocktails as a Composite Redox Electrolyte for Natural Dye-Sensitized Solar Cells

Mudzakir¹,

Nandiyanto²,

Munawaroh³

et al. 2022

Int. J. Adv. Sci. Eng. Inf. Technol.

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Fatty-imidazolinium electrolytes, waste graphite dispersed composite electrolytes like cocktails (1,3-methyl octyl-1,2,3benzotiazolium acetate-cis-oleyl-imidazolinium iodide), and graphite exfoliation using cis-oleyl-imidazolinium acetate have been studied to enhance the efficiency of a newly developing dye-sensitized solar cells (DSSCs). The DSSCs were fabricated in a sandwich structure and characterized using Solar Simulator. The graphite exfoliation was conducted by sonication and microwave energy, as well as the electrochemical method. Cis-oleyl-imidazolinium iodide efficiency (0.53%) was highest than stearyl-imidazolinium iodide and palmityl-imidazolinium iodide because cis-oleyl-imidazolinium iodide has a double bond and the longest alkyl chain which triggered a self-assembly structure formation and increased the rate of I -/I 3transport in cells. Then, the efficiency of DSSCs-based composite electrolytes was in the range of 0.020-0.203%. Dispersion of 0.05% of the graphite results in efficiency enhancement of about 100%, but the greater fraction (0.10%) of the graphite causes a poor performance (lower efficiency), possibly due to interference of the internal electron transportation routes in the DSSC by insoluble graphite. After exfoliation, the conductivity of synthetic graphite (11.58 x 10 -1 S/cm), new battery graphite (9.32 x 10 -1 S/cm), and battery waste graphite (7.96 x 10 -1 S/cm) were increased respectively 10 times, 2 times, and 4 times from the graphite before exfoliation due to changes in crystallinity, the distance between layers, crystal size, formation of multilayer graphene, and the occurrence of π to π* transition. This enhancement of solar conversion efficiency can give a new contribution to the development of DSSC.

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Section: B Fabrication Of Dssc Prototype Based On Graphite Waste Disp...mentioning

confidence: 93%

“…Therefore, it can enhance the photovoltaic performance [30]- [33]. Graphene-based materials also can enhance DSSC performance due to the improvement of hole transport for an optimum concentration in the I -/I 3- [34]- [36]. This research aims to elaborate on a new composite as a redox electrolyte for DSSC.…”

Section: Introductionmentioning

confidence: 99%

Ionic Liquids Based Cocktails as a Composite Redox Electrolyte for Natural Dye-Sensitized Solar Cells

Mudzakir¹,

Nandiyanto²,

Munawaroh³

et al. 2022

Int. J. Adv. Sci. Eng. Inf. Technol.

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“…12 We have reported that similar oscillations of oxidation current occur on a glassy carbon (GC) electrode. 13 The electrochemical reactions of I − in aqueous solution have been studied for applications such as the sulfur-iodine thermochemical cycle for hydrogen production, [14][15][16] dye-sensitized solar cells, [17][18][19] and batteries. [20][21][22][23][24][25][26][27][28] Regarding the sulfur-iodine thermochemical cycle, the electrochemical reactions of I − were used for the electro-electrodialysis to enhance the concentration of hydriodic acid.…”

mentioning

confidence: 99%

“…[14][15][16] As for dye-sensitized solar cells, the reactions of I − were used for the reduction of dyes. [17][18][19] Regarding batteries, the electrochemical reactions of I − were used as the positive electrode reactions in redox systems such as zinc/iodine, [20][21][22][23][24] lithium/iodine, 25,26 viologen/iodine, 27 and polysulfide/iodide. 28 In the above applications, output of the systems is significantly affected by the current of the redox reaction of I − .…”

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confidence: 99%

Promotion Effect by Organic Compounds on Dissolution of an Iodine Film Formed by Electrochemical Oxidation of Iodide Ions in an Aqueous Solution

Itô¹,

Sugimasa²,

Toshimitsu³

et al. 2022

J. Electrochem. Soc.

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When iodide ions (I−) are electrochemically oxidized in an aqueous solution containing a high concentration of I−, an iodine (I2) film is formed on the electrode surface and inhibits further oxidation of I−. The effect of adding an organic compound as an additive on the I2 film was investigated and discussed in the light of electrochemical investigations, spectroscopic analyses, and quantum chemical calculations. Aprotonic organic compounds such as acetonitrile (AN) increased the current of I− oxidation while protonic organic compounds such as ethanol (EtOH) did not increase it. The effect did not simply correspond to the increase in solubility of I2 molecules. In the theoretical calculations, AN showed a behavior that it promoted hydration of an I2 molecule by coordinating with the I2 molecule while EtOH formed hydrogen bonds with H2O molecules and did not show the behavior. AN desorbed from the I2 molecule when the coordinated I2 molecule was hydrated. The aprotonic organic compounds were considered to act as a catalyst to promote the hydration of the I2 molecules contained in the I2 film and thereby promote dissolution of the I2 film.

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Augmentation of electron transfer by Ag incapacitated graphene oxide/dye (Caesalpinia pulcherrima) in photoanode of dye sensitized solar cell

et al. 2023

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Graphene oxide enabled hole transport characteristics in iodide/tri-iodide for improved dye sensitized solar cell performance

Cited by 7 publications

References 14 publications

Ionic Liquids Based Cocktails as a Composite Redox Electrolyte for Natural Dye-Sensitized Solar Cells

Ionic Liquids Based Cocktails as a Composite Redox Electrolyte for Natural Dye-Sensitized Solar Cells

Promotion Effect by Organic Compounds on Dissolution of an Iodine Film Formed by Electrochemical Oxidation of Iodide Ions in an Aqueous Solution

Augmentation of electron transfer by Ag incapacitated graphene oxide/dye (Caesalpinia pulcherrima) in photoanode of dye sensitized solar cell

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