Effect of self-assembly on triiodide diffusion in water based polymer gel electrolytes: An application in dye solar cell

Soni, Saurabh S.; Fadadu, Kishan B.; Vekariya, Rohit L.; Debgupta, Joyashish; Patel, K.D.; Gibaud, Alain; Aswal, Vinod K.

doi:10.1016/j.jcis.2014.03.047

Cited by 37 publications

(26 citation statements)

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“…Amphiphilic block copolymers (ABCs) represent an emerging class of macromolecular matrices, because of their ability to selfassemble into liquid crystalline phases such as cubic, hexagonal and/or lamellar; in these configurations, polymer gels exhibit enhanced s values with respect to other crystalline phases. 312,313 Being the behaviour of ABCs more relevant in water-based solvents, Soni 314 These are triblock copolymers (widely known as poloxamers) composed of a central hydrophobic chain of poly(propylene oxide) (PPO) flanked by two hydrophilic chains of poly(ethylene oxide) (PEO). F77 (M n = 6600), P-123 (M n = 5750) or pure PEG (M n = 6000) were introduced in the 35 wt% ratio in aqueous electrolytes containing BMII 2.0 M, I 2 50 mM and TBP 0.50 M: under these conditions, the cubic phase was obtained, which is the crystalline phase of ABCs having the highest s, due to the presence of interconnected bi-continuous channels.…”

Section: Gel-polymer Aqueous Electrolytesmentioning

confidence: 99%

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: Gel-polymer Aqueous Electrolytesmentioning

confidence: 99%

Aqueous dye-sensitized solar cells

et al. 2015

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“…Amphiphilic block copolymer based PGEs represent a new class of water‐based smart entity containing temperature‐sensitive sol‐to‐gel transitions . Recently, this class of aqueous solid‐state electrolytes has been used in flexible Zn‐ion battery, supercapacitor, and conventional DSSC devices . Unlike any of the earlier reports, this work for the first time demonstrates a self‐healing feature in a flexible quasi‐solid‐state DSSC through a simple cooling step, by employing a smart and sustainable thermoreversible aqueous PGE.…”

Section: Introductionmentioning

confidence: 91%

A Smart Flexible Solid State Photovoltaic Device with Interfacial Cooling Recovery Feature through Thermoreversible Polymer Gel Electrolyte

Sonigara

Machhi

Vaghasiya

et al. 2018

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Quasi-solid-state dye-sensitized solar cells (DSSCs) fabricated with lightweight flexible substrates have a great potential in wearable electronic devices for in situ powering. However, the poor lifespan of these DSSCs limits their practical application. Strong mechanical stresses involved in practical applications cause breakage of the electrode/electrolyte interface in the DSSCs greatly affecting their performance and lifetime. Here, a mechanically robust, low-cost, long-lasting, and environment-friendly quasi-solid-state DSSC using a smart thermoreversible water-based polymer gel electrolyte with self-healing characteristics at a low temperature (below 0 °C) is demonstrated. When the performance of the flexible DSSC is hindered by strong mechanical stresses (i.e., from multiple bending/twisting/shrinking actions), a simple cooling treatment can regenerate the electrode/electrolyte interface and recover the performance close to the initial level. A performance recovery as high as 94% is proven possible even after 300 cycles of 90° bending. To the best of our knowledge, this is the first aqueous DSSC device with self-healing behavior, using a smart thermoreversible polymer gel electrolyte, which provides a new perspective in flexible wearable solid-state photovoltaic devices.

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“…The ionic conductivity of 1.07 × 10 −4 S cm −1 and a power conversion effi ciency of 3.83 % were obtained under air mass 1.5 solar spectrum illumination at 100 mW cm −2 with 8 wt% of SiO 2 -imI composite polymer electrolyte [ 98 ]. Soni et al have investigated polymer gel electrolytes for DSSCs [ 99 ]. Indeed, PEO/PPO-based amphiphilic block copolymers were combined with 1-butyl-3-methylimidazolium iodide [C 4 mim][I] and iodide to synthesize a highly ordered polymer gel to be used in DSSCs and a 2.1 % solar to electricity conversion effi ciency was achieved using a specifi c ruthenium-based dye D907.…”

Section: Solar Cellsmentioning

confidence: 99%