scholarly journals Study of Dye-Sensitized Solar Cells by Scanning Electron Micrograph Observation and Thickness Optimization of PorousTiO2Electrodes

2009 ◽  
Vol 2009 ◽  
pp. 1-8 ◽  
Author(s):  
Seigo Ito ◽  
Mohammad K. Nazeeruddin ◽  
Shaik M. Zakeeruddin ◽  
Peter Péchy ◽  
Pascal Comte ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Scanning Electron Micrograph ◽  
Scattering Layer ◽  
Cross Sectional ◽  
Dye Sensitized ◽  
Scanning Electron Micrography ◽  
Sensitized Solar Cells ◽  
Scanning Electron

In order to improve the photoenergy conversion efficiency of dye-sensitized solar cells (DSCs), it is important to optimize their porousTiO2electrodes. This paper examines the surface and cross-sectional views of the electrodes using scanning electron micrography. Two types of samples for cross-sectional viewing were prepared by mechanically breaking the substrate and by using an Ar-ion etching beam. The former displays the surface of theTiO2particles and the latter shows the cross-section of theTiO2particles. We found interesting surface and cross-sectional structures in the scattering layer containing the 400 nm diameter particles, which have an angular and horned shape. The influence ofTiO2particle size and the thickness of the nanocrystalline-TiO2electrode in DSCs using four kinds of sensitizing dyes (D149, K19, N719 and Z907) and two kinds of electrolytes (acetonitrile-based and ionic-liquid electrolytes) are discussed in regards to conversion efficiency, which this paper aims to optimize.

Enhancement of the Efficiency of Dye-Sensitized Solar Cells (DSSC) by Utilizing Silver Plasmonic Nanoparticles on Hydrothermally-Treated Titania (TiO2) Photoanode

2014 ◽  
Vol 970 ◽  
pp. 224-227
Author(s):  
Daniel Angelo C. Camacho ◽  
Jenrry T. Daulo
Keyword(s):  
Solar Cells ◽  
Hydrothermal Treatment ◽  
Conversion Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Overall Efficiency ◽  
Photovoltaic Characteristics ◽  
Sensitized Solar Cells ◽  
Scanning Electron

Titanium dioxide (TiO2) has been long used as a photoanode for dye-sensitized solar cells (DSSC) for its high photoreductive capability. One approach towards increasing the performance of TiO2 is to load silver nanoparticles (Ag NP) unto the substrate. In this study, hydrothermal treatment of as-received TiO2 anatase was utilized to fabricate nanostructures that could increase the overall efficiency of DSSC. This hydrothermally-treated TiO2 was loaded with Ag NP via the photodegration of silver nitrate (AgNO3). Characterization of Ag-loaded TiO2 (Ag-TiO2), done using Raman Spectroscopy and Field Emission Scanning Electron Microscopy (FESEM), reveal the anatase characteristic of the samples after hydrothermal treatment, as well as the crystalline structure transformation from tetragonal to monoclinic. Furthermore, upon application of the produced TiO2 samples in DSSC, photovoltaic characteristics were obtained. There was an increase in the current density of all of the Ag-TiO2 samples as compared to the untreated TiO2 sample. The DSSC produced using 0.20 Ag-TiO2 ratio exhibited the highest conversion efficiency, resulting to more than 3000% increase in conversion efficiency from the untreated TiO2 sample.

Template-free TiO2 hollow submicrospheres embedded with SnO2 nanobeans as a versatile scattering layer for dye-sensitized solar cells

2015 ◽  
Vol 51 (14) ◽  
pp. 2848-2850 ◽  
Author(s):  
Chih-Liang Wang ◽  
Jin-Yun Liao ◽  
Yubao Zhao ◽  
Arumugam Manthiram
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Conversion Efficiency ◽  
Light Harvesting ◽  
Dye Sensitized Solar Cells ◽  
Dye Adsorption ◽  
Scattering Layer ◽  
Dye Sensitized ◽  
Template Free ◽  
Sensitized Solar Cells

Nanobean SnO2-embedded TiO2 hollow submicrospheres as a scattering layer of dye-sensitized solar cells allow to simultaneously promote dye adsorption, light harvesting, and electron transport, leading to 28% improvement in the conversion efficiency compared to film-based SnO2.

Effect of Structural Shapes of Scattering Layer on Energy Conversion Efficiency in Dye-Sensitized Solar Cells

2016 ◽  
Vol 8 (1) ◽  
pp. 236-240 ◽  
Author(s):  
Won-Yeop Rho ◽  
Mohammed Vaseem ◽  
Hwa-Young Yang ◽  
Tahmineh Mahmoudi ◽  
Seul-Ki Lee ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Energy Conversion Efficiency ◽  
Scattering Layer ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Fabrication of Flexible Dye-Sensitized Solar Cells with Double Sensitized Layers

2013 ◽  
Vol 311 ◽  
pp. 435-440
Author(s):  
Teen Hang Meen ◽  
Shi Mian Chao ◽  
Jun Hao Fan ◽  
Jenn Kai Tsai ◽  
Jhih Hao Hong ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Conversion Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized Solar Cell ◽  
Doctor Blade ◽  
Dye Sensitized ◽  
Ultraviolet Ray ◽  
Sensitized Solar Cells ◽  
Scanning Electron

In this study, nano-crystallized TiO2 photoelectrodes prepared by doctor-blade method on ITO-PEN substrate applied on flexible tandem dye sensitized solar cells (DSSCs) have been investigated by field emission scanning electron microscopy (FE-SEM), UV-Vis spectrophotometer (UV-Vis), and I-V characteristics analyses. In the analysis of FE-SEM, TiO2 thin films prepared by doctor-blade method have the porous structure. The analyses of UV-Vis show that N3 and black dye could be adsorbed on the TiO2 thin films, and the absorption wavelength of TiO2 photoelectrodes could be obviously promoted from the ultraviolet ray to the visible light scope with N3 and Black dye adsorbed. It is great help for conversion efficiency of DSSCs. Under the irradiation of the sunlight simulator (AM 1.5,100 mW/cm2), the flexible dye-sensitized solar cell with double sensitized layers has the best conversion efficiency η =5.59 %.

scholarly journals Efficiency Improvement in Dye-Sensitized Solar Cells by Modify Titanium Dioxide Formation on Supercritical Carbon Dioxide Fluid Synchronous Dyeing

2021 ◽  
pp. 626-636
Author(s):  
Shen-Kung Liao ◽  
Jin-yu Ruan ◽  
Chie-Hao Chao ◽  
Chih-Hsun Liao
Keyword(s):  
Carbon Dioxide ◽  
Solar Cells ◽  
Supercritical Carbon Dioxide ◽  
Conversion Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Scattering Layer ◽  
Compact Layer ◽  
Dye Sensitized ◽  
Sensitized Solar Cells ◽  
Supercritical Carbon

In this study, the dye sensitized solar cells (DSSC) were assembled by using natural dyes extracted from roselle and red phoenix as sensitizer coated fluorine-doped tin dioxide substrate (FTO) plate used a counter electrode for nanocrystalline TiO2. We investigated the formation of modified titanium dioxide on dye-sensitized solar cells by simultaneous dyeing with supercritical carbon dioxide fluid. The photoelectrode is made of compact layer and scattering layer. Supercritical carbon dioxide fluid extracted natural dyestuff and synchronous dyed photoelectric. The photoelectric conversion efficiency is the best at the dyeing parameters of 3000 psi, 50 ºC, and 30 minutes. Experimental results show that adding a scattering layer to the compact layer can improve the conversion efficiency. SEM can observe that the polyethylene glycol-added scattering layer has more pore structures in which improves the electrode’s ability to capture sunlight. The conversion efficiency of 0.13% can be obtained by using 9:1 mixed dyes of anthocyanin and chlorophyll. The photoelectric conversion efficiency with the P25/R-type/PEG scattering layer is about 30% higher than that of a single compact layer. Finally the paper proposes a schematic diagram of the dye-sensitized solar cell.

Mesoporous Bi2S3 nanorods with graphene-assistance as low-cost counter-electrode materials in dye-sensitized solar cells

Nanoscale ◽  
2014 ◽  
Vol 6 (23) ◽  
pp. 14433-14440 ◽  
Author(s):  
Sheng-qi Guo ◽  
Tian-zeng Jing ◽  
Xiao Zhang ◽  
Xiao-bing Yang ◽  
Zhi-hao Yuan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
Counter Electrode ◽  
Electrode Materials ◽  
Low Cost ◽  
Dye Sensitized Solar Cells ◽  
Hydrothermal Conditions ◽  
Catalytic Activities ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

In this work, we report the synthesis of mesoporous Bi2S3 nanorods under hydrothermal conditions without additives, and investigated their catalytic activities as the CE in DSCs by I–V curves and tested conversion efficiency.

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