*  High-Performance dye-sensitized solar cells with various nanostructured materials as counter electrode
Traditionally, Pt prepared by hydrolysis was used as the counter electrode of dye-sensitized solar cells. But the hydrolysis requires a high-temperature process, so that it is not suitable for flexible substrates like plastics. In addition, noble Pt remarkably increases the cost of dye-sensitized solar cells. Here, we report three types of nanostuctured materials as the counter electrode of dye-sensitized solar cells, including nanostrutured Pt by polyol reduction of Pt precursors, nanocomposites and nanotube films.
*  Recent Developments in Solid-State Dye-Sensitized Solar Cells - Yum - 2008 - ChemSusChem - Wiley Online Library
The dye-sensitized solar cell, developed in the 1990s, is a non-conventional solar technology that has attracted much attention owing to its stability, low cost, and device efficiency. Power-conversion efficiencies of over 11 % have been achieved for devices that contain liquid electrolytes, whereas solid-state devices that do not require a liquid electrolyte display an overall efficiency of 5 %. Improvement of the efficiency of solid-state dye-sensitized solar cells requires optimization of their various components, such as the hole-transport material, sensitizer, mesoporous TiO2 film, and the blocking layer. This Minireview highlights the current state of the art and future directions of solid-state dye-sensitized solar cell technology. ...
*  Highly Efficient Dye-Sensitized Solar Cells with Gel-Coated Graphene and Graphene/Carbon Nanotube Composites as the Counter...
Dye-sensitized solar cells (DSCs) are promising to be the next-generation solar cells arising from their high light-to-electricity conversion efficiency and low fabrication cost.
*  Notable catalytic activity of oxygen-vacancy-rich WO2.72 nanorod bundles as counter electrodes for dye-sensitized solar cells -...
For the first time, nonstoichiometric WO2.72 was used as a counter electrode (CE) in dye-sensitized solar cells (DSSCs). Oxygen-vacancy-rich WO2.72 nanorod bundles with notable catalytic activity for triiodide and thiolate reduction were prepared in this study. The photovoltaic parameters of dye-sensitized s
*  Mini Dye-Sensitized Solar Cells Module
Maximizing Solar Energy Absorption in DSSC. Through the following key select activities, students will learn to fabricate an artificial photosynthetic device using nanotechnology and plant pigments to capture sun's energy and convert it to electricity. Each Activity prepares students for the Design Project, in which they are challenged to create the most efficient dye-sensitized solar cell, using vegetable and/or fruit dyes, that is capable of powering an electronic device.. MWM will give students an opportunity to understand the world around them in a way they have never experienced before. The modules promote an awareness of the roles science and technology play in society and guide students to take increased control of their work.. ...
*  Conducting polymer and titanium carbide-based nanocomposites as efficient counter electrodes for dye-sensitized solar cells -...
He, Jiangjing, Duffy, Noel W., Pringle, Jennifer M. and Cheng, Yi-Bing 2013, Conducting polymer and titanium carbide-based nanocomposites as efficient counter electrodes for dye-sensitized solar cells, Electrochimica acta, vol. 105, no. 41516, pp. 275-281, doi: 10.1016/j.electacta.2013.05.005. ...
*  Synergistic Effect of N-Methylbenzimidazole and Guanidinium Thiocyanate on the Performance of Dye-Sensitized Solar Cells Based...
This thesis focuses on liquid redox electrolytes in dye-sensitized solar cells (DSCs). A liquid redox electrolyte, as one of the key constituents in DSCs, typically consists of a redox mediator, additives and a solvent. This thesis work concerns all these three aspects of liquid electrolytes, aiming through fundamental insights to enhance the photovoltaic performances of liquid DSCs.. Initial attention has been paid to the iodine concentration effects in ionic liquid (IL)-based electrolytes. It has been revealed that the higher iodine concentration required in IL-based electrolytes can be attributed to both triiodide mobility associated with the high viscosity of the IL, and chemical availability of triiodide. The concept of incompletely solvated ionic liquids (ISILs) has been introduced as a new type of electrolyte solvent for DSCs. It has been found that the photovoltaic performance of ISIL-based electrolytes can even rival that of organic solvent-based electrolytes. And most strikingly, ...
*  Low-cost p-type dye-sensitized solar cells based on Dawson-type transition metal-substituted polyoxometalate inorganic co...
Photosensitizers play a crucial role in p-type dye-sensitized solar cells (p-DSSCs). In this study, we first introduced two Dawson-type transition metal-substituted polyoxometalate dyes to co-sensitize the NiO electrode and achieved an overall power conversion efficiency (PCE) of 0.0464%, which is the highes
*  Dye-Sensitized Solar Cells Based on Nanocrystalline TiO2 Films Surface Treated with Al3+ Ions: Photovoltage and Electron...
Nanocryst. TiO2 films, surface modified with Al3+, were manufd. by depositing a TiO2 suspension contg. small amts. of Al nitrate or Al chloride onto conducting glass substrates, followed by drying, compression, and finally heating to 530°. Electrodes prepd. with TiO2 nanoparticles coated with ,0.3% Al2O3 with respect to TiO2 improved the efficiency of the dye-sensitized solar cell. This amt. corresponds to less than a monolayer of Al2O3. Thus, the Al ions terminate the TiO2 surface rather than forming a distinct Al2O3 layer. The Al-ion surface treatment affects the solar cell in different ways: the potential of the conduction band is shifted, the electron lifetime is increased, and the electron transport is slower when Al ions are present between interconnected TiO2 particles.. Keywords: dye sensitized solar cell titanium oxide photovoltage electron transport ; nanocryst titanium oxide aluminum ion surface treatment. ...
*  Electron transport properties in dye-sensitized solar cells with {001} facet-dominant TiO2 nanoparticles - Physical Chemistry...
Dye-sensitized solar cells (DSSCs) with reactive {001} facet-dominant TiO2 have attracted a great deal of attention owing to their high solar cell performance, despite the origin and the variation of the results being controversial. Here, we report the characteristic charge transport properties of DSSCs comp
*  Solar Energy Conversion Systems | China-Mainland | Sigma-Aldrich
Experimental evidence in the literature has shown that the power efficiency of both solar cells and photocatalytic thin-film electrodes can be enhanced in the presence of metallic nanoparticles because of their surface plasmonic effects. In the field of solar cells, gold nanoparticles have been used to enhance the efficiency of a dye-sensitized solar cell,22 an organic solar cell,23 and a silicon solar cell,24 as shown in Figure 1. Gold or silver nanoparticles have been incorporated into these three types of solar cells in such a way that the photoactive layers of the cells benefit from the enhanced light absorption near the plasmonic structure. For example, gold nanoparticles are embedded in a thin layer of TiO2 under the dye layer in order to enhance the absorption cross-section of the dye-sensitized solar cell (Figure 1A). The top coating of gold nanoparticles with TiO2 is critical to prevent corrosion of gold nanoparticles in the presence of liquid electrolytes. Meanwhile, the thickness ...
*  Electron transport and recombination in ZnO-based dye-sensitized solar cells - Opus
The photovoltaic performance of ZnO-based dye-sensitized solar cells (DSCs) has been studied for three different configurations involving two dyes and two types of electrolytes with the iodide/iodine as redox mediator: ZnO/N719/organic solvent electrolyte (C1), ZnO/D149/organic solvent electrolyte (C2), and ZnO/N719/ionic liquid electrolyte (C3). The DSCs were characterized by measuring current-voltage curves and photovoltage as a function of light intensity and by electrochemical impedance spectroscopy (EIS), intensity-modulated photocurrent spectroscopy (IMPS), intensity-modulated photovoltage spectroscopy (IMVS), and open circuit photovoltage decay (OCVD). The results demonstrate the good light harvesting properties of the D149 dye and highlight the photovoltage limitation of the solvent-free (ionic liquid) electrolyte. The intensity dependence of the photovoltage and the OCVD, EIS, and IMVS results provide evidence of the nonlinear character of the recombination kinetics. It has been found ...
*  Coumarin 343-NiO films as nanostructured photocathodes in dye-sensitized solar cells : Ultrafast electron transfer, effect of...
Nanoporous, p-type NiO films were sensitized with coumarin 343 (C343), and the photoinduced electron transfer dynamics was studied in the presence of different concentrations of electrolyte (I-3(-)/I- in propylene carbonate). Electron transfer from the valence band of NiO to the excited C343 is very fast, occurring on time scales from hundreds of femtoseconds to a few picoseconds, but also the subsequent recombination is quite rapid, on the time scale of tens of picoseconds. Nevertheless, formation of an intermediate, attributed to I2-I NiO(+), was observed on the picosecond time scale. Simultaneously the reduced dye was converted back to the C343 ground state, indicating that recombination could be intercepted by 13 reduction. Consistent with that interpretation, we observed oxidized NiO and depletion Of 13 persisting on the millisecond time scale. Complete dye-sensitized solar cells (DSSCs) with these films as photocathode gave up to 10-11% incident photon to current conversion efficiency at ...
*  Enhanced efficiency of over 10% in dye-sensitized solar cells through C and N single- and co-doped TiO2 single-layer electrodes...
Herein, we report the impact of single- and co-doping of nanoparticle TiO2 films with carbon and nitrogen on the photovoltaic characteristics of their corresponding dye-sensitized solar cell (DSC) devices. Different DSCs with various compositions of the photoanode electrodes are fabricated to study their str
*  Transistorlike behavior in photoconductor based on dye-sensitized solar cell
A photogated transistor is established based on the dye-sensitized solar cell using nanocrystalline TiO2 films. Voltage-current curves are characterized with three types of transport behaviors: linear increase, saturated plateau, and breakdownlike increase, which are actually of the typical performances for a phototransistor. Moreover, an asymmetric behavior is observed in the voltage-current loops, which is believed to be due to the difference in the effective photoconducting areas rather than the cross-section areas. The photovoltaic voltage between the common counter electrode and drain (VCE-D) is examined as well during the loop measurements, clarifying that the predominant dark process in source and the predominant photovoltaic process in drain are series connected, modifying the electric potential levels, and thus resulting in the characteristic phototransistor behaviors ...
*  Nanomaterials | Free Full-Text | Highly-Efficient Plasmon-Enhanced Dye-Sensitized Solar Cells Created by Means of Dry Plasma...
Plasmon-assisted energy conversion is investigated in a comparative study of dye-sensitized solar cells (DSCs) equipped with photo-anodes, which are fabricated by forming gold (Au) and silver (Ag) nanoparticles (NPs) on an fluorine-doped tin oxide (FTO) glass surface by means of dry plasma reduction (DPR) and coating TiO2 paste onto the modified FTO glass through a screen printing method. As a result, the FTO/Ag-NPs/TiO2 photo-anode showed an enhancement of its photocurrent, whereas the FTO/Au-NPs/TiO2 photo-anode showed less photocurrent than even a standard photo-anode fabricated by simply coating TiO2 paste onto the modified FTO glass through screen printing. This result stems from the small size and high areal number density of Au-NPs on FTO glass, which prevent the incident light from reaching the TiO2 layer.
*  Plasmonic Dye-Sensitized Solar Cells Using Core-Shell Metal-Insulator Nanoparticles.
We present an investigation into incorporating core-shell Au-SiO(2) nanoparticles into dye-sensitized solar cells. We demonstrate plasmon-enhanced light absorption, photocurrent, and efficiency for both iodide/triiodide electrolyte based and solid-st
*  Dye regeneration and charge recombination in dye-sensitized solar cells with ferrocene derivatives as redox mediators - Energy ...
Ferrocene compounds are promising redox shuttles for application in dye-sensitized solar cells (DSCs). Chemical modification of the cyclopentadienyl rings is easily achievable affording almost unlimited variation of the redox properties. This allows fine-tuning of the driving force for dye-regeneration and o RACI100: Celebrating Australian Chemistry
*  Integrating metalloporphycenes into p-type NiO-based dye-sensitized solar cells - Chemical Communications (RSC Publishing)
In the current work, we have explored a novel synthetic route towards metalated porphycenes and their use in p-type NiO-based dye-sensitized solar cells. Particular emphasis is placed on the influence that the relative positioning of the anchoring group exerts on the DSSC performance.
*  dye-sensitized solar cell
Page contains details about dye-sensitized solar cell . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
*  dye-sensitized solar cells
Page contains details about dye-sensitized solar cells . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
*  dye-sensitized solar cell
Page contains details about dye-sensitized solar cell . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
*  dye-sensitized solar cell
Page contains details about dye-sensitized solar cell . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
*  dye-sensitized solar cell
Page contains details about dye-sensitized solar cell . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
*  Energy breakthrough uses sun to create solar energy materials - ScienceBlog.com
Our system can synthesize solar energy materials in minutes compared to other processes that might take 30 minutes to two hours," Chang said. "This gain in operation speed can lower cost.". In these experiments, the solar materials were made with copper indium diselenide, but to lower material costs it might also be possible to use a compound such as copper zinc tin sulfide, Chang said. And to make the process something that could work 24 hours a day, sunlight might initially be used to create molten salts that could later be used as an energy source for the manufacturing. This could provide more precise control of the processing temperature needed to create the solar energy materials.. State-of-the-art chalcogenide-based, thin film solar cells have already reached a fairly high solar energy conversion efficiency of about 20 percent in the laboratory, researchers said, while ...