Synthesising methods of layered double hydroxides and its use in the fabrication of dye Sensitised solar cell (DSSC): A short review
01 Nov 2017-Vol. 263, Iss: 3, pp 032020
TL;DR: The layered double hydroxides (LDH) as mentioned in this paper are anionic clay substances comprising of stacked cationic layers and interlayer anions, which are used in the fabrication of Dye Sensitized Solar Cell (DSSC).
Abstract: The layered double hydroxides (LDH) which are anionic clay substances comprising of stacked cationic layers and interlayer anions. The cationic sheets contain octahedral structure consisting the divalent and trivalent ions in the center and hydroxyl bunches in the corners, gathered by three bonding with the neighbouring octahedra on every side of the layer. The ratio between the quantity of cations and OH− ions is 2:1, so a positive charge shows up on the layer because of the presence of trivalent cations. The interlayer space gives the compensation anions and water molecules, assuring a balanced out layered structure. The LDH materials were successfully synthesised from magnesium, aluminium, zinc and chromium chloride salts utilizing the co-precipitation technique. A Zn-Al LDH was researched as a potential sorbent material. This article reviews the recent advances in the preparation and intercalation of layered double hydroxides and its application in the fabrication of Dye Sensitized Solar Cell (DSSC).
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TL;DR: In this article , the progress made in development of nanoscale layered double hydroxide (LDH) based hybrid nanomaterials for the treatment of different kind of environmental pollutants present in wastewater is reviewed.
23 citations
TL;DR: In this article, a new nanocomposite based on metal mixed oxides as working electrode for increasing the utilization of dye-sensitized solar cells was introduced, and the obtained substance is used as a working electrode that shows improved efficiency in comparison with TiO2.
21 citations
TL;DR: In this article, the zinc tin mixed metal oxides (MMOs) are prepared by calcining the ZnSn layered double hydroxide (LDH) at different temperatures and a series of dye-sensitized solar cells (DSSCs) based on the corresponding MMOs used as photoanode materials are fabricated.
12 citations
TL;DR: It was shown that the MgFeAl-LDH can act as a simultaneous photoabsorber and charge separator, effectively replacing the dye and semiconductor complex in DSSCs and yielding an efficiency of 1.56%.
Abstract: This work highlights the use of Fe-modified MgAl-layered double hydroxides (LDHs) to replace dye and semiconductor complexes in dye-sensitized solar cells (DSSCs), forming a layered double hydroxide solar cell (LDHSC). For this purpose, a MgAl-LDH and a Fe-modified MgAl LDH were prepared. X-ray diffraction spectroscopy (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray (EDX) spectroscopy were used to analyze the structural properties, morphology, and success of the Fe-modification of the synthesized LDHs. Ultraviolet-visible (UV-Vis) absorption spectroscopy was used to analyze the photoactive behavior of these LDHs and compare it to that of TiO2 and dye-sensitized TiO2. Current-voltage (I–V) solar simulation was used to determine the fill factor (FF), open circuit voltage (VOC), short circuit current (ISC), and efficiency of the LDHSCs. It was shown that the MgFeAl-LDH can act as a simultaneous photoabsorber and charge separator, effectively replacing the dye and semiconductor complex in DSSCs and yielding an efficiency of 1.56%.
12 citations
Cites methods from "Synthesising methods of layered dou..."
...For application in DSSCs, LDHs have been used as mixed metal oxides (MMOs) bonded or sintered to ITO on their own or deposited on other wideband semiconductors such as TiO2 [18]....
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TL;DR: In this paper , a carbon-based counter electrode (CE) of dye-sensitized solar cells (DSSCs), such as graphene composite (G), have attracted unprecedented interest in recent years, due to their simplicity of manufacture, superior corrosion resistance, and low cost compared to platinum (Pt) electrodes.
Abstract: Due to their simplicity of manufacture, superior corrosion resistance, and low cost compared to platinum (Pt) electrodes, carbon-based counter electrodes (CE) of dye-sensitized solar cells (DSSCs), such as graphene composite (G), have attracted unprecedented interest in recent years. However, poor surface adhesion between the carbon counter electrodes (CCE) and the FTO substrate, as well as limited surface area and poor inter-particle connectivity between the carbon materials, have continuously proven to be a significant problem. To avoid these issues, we used a hydrothermal technique to fabricate G/Zn-Al-LDH as CE in DSSCs. The conversion of triiodide to iodide utilizing electrons flowing through an external circuit relies on CE so CE plays a crucial role in DSSCs. Enhancing the power conversion efficiency (PCE) and lowering the device's cost are two efficient ways to increase the performance of a CE. The prepared G/Zn-Al-LDH was investigated by X-ray diffraction (XRD), Raman spectroscopy, High-Resolution Transmission Electron Microscopy (HRTEM), Scanning electron microscope (SEM), surface area Fourier Transform infrared spectroscopy (FTIR), Electrochemical impedance spectroscopy (EIS), Cyclic voltammetry (CV) and Tafel polarization test. G/Zn-Al-LDH was used as novel CE in DSSCs with TiO2 nanoparticles (TNP) as a working electrode, Eosin Y (EY) as photosensitizer, and LiI-I2 as a liquid electrolyte. The photovoltaic parameters were observed to be 0.66 V and 11.23 mA/cm2 for open circuit voltage (VOC) and short circuit current density (JSC), respectively for TNP/EY/LiI-I2/G/ZnAl-LDH system. The assembled cell with TNP/EY/LiI-I2/G/ZnAl-LDH having (PCE) of 4.4 % is comparable to TNP/EY/LiI-I2/GO having 3.7 % which is measured under similar testing conditions.
4 citations
References
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TL;DR: In this article, the hole transfer process at dye/hole conductor interface, ionic transportation inside hole conductor media and the factors which depress the efficiency of solid-state cells are discussed.
664 citations
TL;DR: In this article, the beneficial and harmful effects of layered double hydroxides upon human health are summarized and a summary of the fields in which they could be applied to prevent public health is also provided.
364 citations
TL;DR: In this article, a review on recent results on characterisation of layered double hydroxides (LDHs) prepared by conventional coprecipitation methods is reported, focusing on the application of few experimental methods for characterising structural properties of these compounds.
345 citations
TL;DR: The photostability of the DSSC sensitizer material must be capable of undergoing many redox cycles without decomposition, and must also have the ability to carry attachment groups, such as phosphonate or carboxylate, to promptly graft it to the TiO2 oxide.
Abstract: Dye-sensitized solar cell (DSSC) provides credible alternative concept for inorganic solid-state photovoltaic devices. The conversion efficiency of DSSC is mainly based on the dye coated on the porous semiconductor TiO2 film. The use of natural dyes in solar cells is a promising development to this technology because it cuts down the high cost of noble metals and chemical synthesis. Therefore, this type of solar cell has attracted considerable attention from the academic and industrial communities. Numerous kinds of pigments, such as anthocyanin, carotenoid, chlorophyll, and flavonoid, extracted from various plant components, such as leaves, fruits, and flowers, have been tested as sensitizers. The photostability of the DSSC sensitizer material must be capable of undergoing many redox cycles without decomposition, and must also have the ability to carry attachment groups, such as phosphonate or carboxylate, to promptly graft it to the TiO2 oxide. This paper highlights and discusses the development of natural dye photosensitizers and the mechanisms affecting the dye stability.
329 citations
TL;DR: In this article, a detailed review of the work done to improve the performance of DSSC, with supporting data, is presented, which includes a summary of the suggested improvements by various researchers, bifurcated into different sections with respect to the different components.
Abstract: Dye Sensitized Solar Cell (DSSC) is considered to be one of the most promising technological developments in the field of Solar Cells. It is basically a cell that imitates the process seen in plant cells to produce energy. It is a photo-electrochemical cell, considering the electron moments caused by the combined effect of the photon energy and the chemical reactions. The DSSC being transparent to some extent and comparatively cheaper than conventional solar photo-voltaic, can be a potential energy source for the future. But there are many aspects that need to be worked upon before declaring it as a feasible commercial product. The paper emphasizes on these aspects and the various improvements that the DSSC has gone through in recent years. This is a detailed review of the work done to improve the performance of DSSC, with supporting data. A comparative study of the effect of various suggested modification to the different components of DSSC has been done. This would give a clear idea about the most recent improvements done in DSSC with respect to the various components. It includes a summary of the suggested improvements by various researchers, bifurcated into different sections with respect to the different components of the DSSC. It was observed that incorporating graphene sheets of various sizes in the photo anode helped to improve the efficiency of DSSC significantly, giving a maximum efficiency of 6.62%. In case of novel dyes used in the DSSC fabrication the D-A-pi-A indoline dyes showed a great enhancement in the cell efficiency, with efficiency of up to 6.9%. Incorporation of Pt in counter electrodes and 3D-CE also showed notably good efficiency in DSSC, the efficiency improving up to 8.8%.
274 citations