Organic-Ruthenium(II) Polypyridyl Complex Based Sensitizer for Dye-Sensitized Solar Cell Applications

Giribabu, Lingamallu; Singh, Varun Kumar; Kumar, Challuri Vijay; Soujanya, Yarasi; Reddy, Veerannagari Gopal; Reddy, Paidi Yella

doi:10.1155/2011/294353

Cited by 14 publications

(6 citation statements)

References 35 publications

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“…This can be altered by adding more methane groups that result in expanding the π-conjugation linkers and an increased efficiency of the DSSC [ 224 ]. Giribabu and co-workers synthesized RD-Cou sensitizers and obtained the conversion efficiency of 4.24% using liquid electrolyte, where coumarin moiety was bridged to the pyridyl groups by thiophene, which resulted in the extended π-conjugation and broadening of the metal-to-ligand charge transfer spectra [ 225 ]. They found that the absorption spectrum of RD-Cou dye was centered at 498 nm with a ɛ = 16,046 M − 1 cm − 1 .…”

Section: Previous and Further Improvements In Dsscsmentioning

confidence: 99%

Dye-Sensitized Solar Cells: Fundamentals and Current Status

Sharma

Sharma³

2018

Nanoscale Res Lett

772

426

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Dye-sensitized solar cells (DSSCs) belong to the group of thin-film solar cells which have been under extensive research for more than two decades due to their low cost, simple preparation methodology, low toxicity and ease of production. Still, there is lot of scope for the replacement of current DSSC materials due to their high cost, less abundance, and long-term stability. The efficiency of existing DSSCs reaches up to 12%, using Ru(II) dyes by optimizing material and structural properties which is still less than the efficiency offered by first- and second-generation solar cells, i.e., other thin-film solar cells and Si-based solar cells which offer ~ 20–30% efficiency. This article provides an in-depth review on DSSC construction, operating principle, key problems (low efficiency, low scalability, and low stability), prospective efficient materials, and finally a brief insight to commercialization.

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Section: Previous and Further Improvements In Dsscsmentioning

confidence: 99%

Dye-Sensitized Solar Cells: Fundamentals and Current Status

Sharma

Sharma³

2018

Nanoscale Res Lett

772

426

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“…Although the conversion efficiency obtained was not much desirable, the thermal analysis of this dye shows that it is stable upto 220°C. The thermal stability of this sensitizer has the capability to be used for rooftop applications [36].…”

Section: Recent Progress In Metal-based Sensitizers For Dsscsmentioning

confidence: 99%

Novel improvements in the sensitizers of dye-sensitized solar cells for enhancement in efficiency-a review

Chawla

Tripathi

2015

Int. J. Energy Res.

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SummaryIn the present review article, we have focused our study on the novel improvements that have been brought about in the molecular design of various sensitizers for application in dye‐sensitized solar cells (DSSCs). The sensitizers based on noble metals such as ruthenium, osmium, and rhenium showed high efficiency, but their cost and complicated synthesis restrict their wide applications. Further, to reduce the cost of fabrication of DSSCs, researchers are focusing their interest in organic sensitizers. In this context, organic dyes have offered several possibilities, as by improving their molecular structure brings about improvement in the light harvesting ability of dyes, and with the help of such dyes, optimal DSSCs have been fabricated. Further, to reduce the cost of DSSCs, researchers are also focusing on natural sensitizers such as betacyanin and anthocyanin or chlorophyll, as natural sensitizers are easy to prepare, cost effective, and environmentally friendly. With the help of these natural sensitizers, eco‐friendly and more cost‐effective DSSCs can be fabricated. Thus, we found from our study that beside metal‐based sensitizers, organic and natural sensitizers also offer a vast potential for the optimization of efficiency in DSSCs. Copyright © 2015 John Wiley & Sons, Ltd.

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“…The DSSC device has three major parts: (a) a semiconductor film electrode (ie, anode)—a transparent conducting glass electrode with minute interstices bandgap semiconductor, like the dye‐coated TiO 2 , which acts as a light sensitizer; (b) an electrolyte layer, wherein the dye molecules are encircled with a layer of electrolyte, which has the ability to recompenses for the lost electrons; (c) and counter electrodes (ie, cathode), which are coated with platinum or graphite . Dyes that are used as sensitizers for the DSSCs must satisfy the following conditions: (a) the dyes absorption spectra must include a broad light spectra between visible light to near‐infrared light region, (b) the dye molecules must consist of anchoring groups like the carboxyl and the hydroxyl groups which strongly bind to the semiconductor oxide surfaces and facilitate the injection of the electrons into the conduction wide‐band gaps of the semiconductor oxide from the dyes, and (3) the dye sensitizers must be well‐balanced for a long period of usage . Furthermore, the energy levels of all molecules, electrolytes, and the semiconductor oxide assist the addition of the electrons and the dye regeneration from the electrolytes …”

Section: Introductionmentioning

confidence: 99%

Performance of the dye‐sensitized solar cells fabricated using natural dyes from Ixora coccinea flowers and Cymbopogon schoenanthus leaves as sensitizers

2019

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Summary In this study, the chlorophyll and anthocyanin natural dyes were extracted from Cymbopogon schoenanthus leaves and Ixora coccinea flowers, respectively. Thereafter, these dyes were used as sensitizers in the TiO2‐based dye‐sensitized solar cells (DSSCs). Ten solvents were used for solubilizing the dyes. Amongst the 10 solvents, the ethanol showed the highest absorption spectra for the anthocyanin and chlorophyll molecules. Temperature significantly affected the yield of the natural dyes. It was seen that an optimal extraction temperature of 70°C and 80°C results to higher anthocyanin and chlorophyll yields, respectively. However, an extraction temperature above 70°C and 80°C has shown a sharply decrease in the anthocyanin and chlorophyll concentrations, respectively. Also, the solution of acidic extraction, especially with a pH value of 4, increased the dyes concentrations. As seen in the results, the chlorophyll‐sensitized DSSCs had 0.23% conversion efficiency (ƞ), short‐circuit current (Isc) of 0.9 mA/cm–2, open‐circuit voltage (Voc) of 0.51 V, and 49.13% fill factor (FF). Meanwhile, the anthocyanin‐sensitized DSSCs showed 0.16% ƞ, 0.4 mA/cm–2 Isc, 0.53 V Voc, and 75.93% FF.

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Organic-Ruthenium(II) Polypyridyl Complex Based Sensitizer for Dye-Sensitized Solar Cell Applications

Cited by 14 publications

References 35 publications

Dye-Sensitized Solar Cells: Fundamentals and Current Status

Dye-Sensitized Solar Cells: Fundamentals and Current Status

Novel improvements in the sensitizers of dye-sensitized solar cells for enhancement in efficiency-a review

Performance of the dye‐sensitized solar cells fabricated using natural dyes from Ixora coccinea flowers and Cymbopogon schoenanthus leaves as sensitizers

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