Study of Electrochemical Deposition Process of Graphene Oxide on DSSC TiO2 Based Photoanode

2019 ◽  
Vol 966 ◽  
pp. 378-385 ◽  
Author(s):  
Annisa Aprilia ◽  
Vika Marcelina ◽  
Fitri Yuliasari ◽  
Yeni Wahyuni Hartati ◽  
Fitrilawati ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Deposition ◽  
Fill Factor ◽  
Annealing Treatment ◽  
Deposition Process ◽  
Photocurrent Density ◽  
Voltage Range ◽  
Dye Sensitized ◽  
Ruthenium Dye ◽  
Photovoltaic Characteristics

Graphene oxide (GO) layer has been successfully deposited on to ITO/TiO2 substrate by electrochemical deposition. Deposition process of GO layers were carried out in one, three, and six cycles in the voltage range of-1.6 to 0 volt and scan rate of 50 mV/s. The variation of cycles was performed, in order to study the deposition process relates to device performances. TiO2 macro-channel (TiO2μc) also introduced in photoanode system and it required annealing treatment up to 500°C. The oxygen content in GO will be reduced by annealing treatment and the reduced-GO (rGO) layer was trapped inside of TiO2 mesoporous. The cyclic voltammetry curves of blank sample and GO deposition were also observed in order to ensure the GO deposition process was successfully done. After immersing in ruthenium dye overnight, the ITO/TiO2/rGO/TiO2-μc was sandwiched with Pt/FTO as counter electrode to configure dye sensitized solar cell (DSSC) structure. The photovoltaic characteristics, morphology, and UV-Vis absorbance of each layer were investigated. A highest DSSC efficiency (η= 3.34 %) was achieved by 3-cycles of GO deposition process of photoanode with photocurrent density (Jsc) of 9.94 mA/cm2, open voltage (Voc) of 0.70 V and fill factor (FF) of 48.69% under 100 mW/cm2 of light irradiation.

scholarly journals Structural and Electrical properties of ZnO Nanorod based dye sensitized solar cell

2017 ◽  
Vol 12 (8) ◽  
pp. 4275-4280
Author(s):  
R. Krithivasan ◽  
S. Brahadeeswaran ◽  
KR. Santha ◽  
S. Sampath Krishnan
Keyword(s):  
Solar Cell ◽  
Fill Factor ◽  
Sol Gel ◽  
Dye Sensitized Solar Cell ◽  
Dye Sensitized ◽  
Working Electrode ◽  
Structural And Electrical Properties ◽  
Sol Gel Process ◽  
Ruthenium Dye ◽  
Novel Design

ThePreparation of nanorod involves simple and novel design of sol-gel process. Further, by using the prepared nanorods,working electrode will be prepared and it will be sensitized with ruthenium dye. A platinum coated FTO electrode will beused as a counter electrode. Dye sensitized solar cell will be assembled by using the working electrode and counterelectrode. FE-SEM and UV characteristics have been carried out at 250ᵒC, 350ᵒC&450ᵒC. The size and band gap ofnanorod at these temperatures has been found out to be 1μm and 2.95eV, 200nm and 2.86eV, 100nm and 2.79eVrespectively. The power conversion efficiency and the fill factor have been obtained as 2.72% and 0.722 respectively.

scholarly journals A New Ruthenium Sensitizer Containing Benzo[1,9]quinolizino(acridin-2-yl)vinyl-2,2′-bipyridine Ligand for Effective Nanocrystalline Dye-Sensitized Solar Cells

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Jeum-Jong Kim ◽  
Jeonghun Yoon ◽  
Eun Jung Kim ◽  
Bo Ram Kim ◽  
Yong-Jin Yoon ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
Fill Factor ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Photocurrent Density ◽  
Open Circuit ◽  
Dye Sensitized ◽  
Bipyridine Ligand ◽  
Sensitized Solar Cells

Novel ruthenium bipyridyl sensitizer incorporating conjugated benzo[1,9]quinolizino-(acridin-2-yl)vinyl-2,2′-bipyridine ligand [JJ-12] has been synthesized and demonstrated as efficient sensitizer in dye-sensitized solar cells. A mesoporous titania film stained withJJ-12exhibits a remarkable incident monochromatic photon-to-current conversion efficiency of 82%. Under standard AM 1.5 sunlight, the solar cell using a liquid-based electrolyte consisting of 0.6 M 1,2-dimethyl-3-propylimidazolium iodide (DMPII), 0.05 M I2, 0.1 M LiI, and 0.5 Mtert-butylpyridine in acetonitrile exhibits a short-circuit photocurrent density of 16.47 mA/cm2, an open-circuit voltage of 0.71 V, and a fill factor of 0.71, corresponding to an overall conversion efficiency of 8.34 %.

scholarly journals Optical modeling-assisted characterization of dye-sensitized solar cells using TiO2 nanotube arrays as photoanodes

2014 ◽  
Vol 5 ◽  
pp. 895-902 ◽  
Author(s):  
Jung-Ho Yun ◽  
Il Ku Kim ◽  
Yun Hau Ng ◽  
Lianzhou Wang ◽  
Rose Amal
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Photocurrent Density ◽  
Charge Generation ◽  
Dye Sensitized ◽  
Electron Transport Property ◽  
Modelling Analysis ◽  
Initial Charge ◽  
Photovoltaic Characteristics ◽  
Sensitized Solar Cells

Photovoltaic characteristics of dye-sensitized solar cells (DSSCs) using TiO2 nanotube (TNT) arrays as photoanodes were investigated. The TNT arrays were 3.3, 11.5, and 20.6 μm long with the pore diameters of 50, 78.6, and 98.7 nm, respectively. The longest TNT array of 20.6 μm in length showed enhanced photovoltaic performances of 3.87% with significantly increased photocurrent density of 8.26 mA·cm−2. This improvement is attributed to the increased amount of the adsorbed dyes and the improved electron transport property with an increase in TNT length. The initial charge generation rate was improved from 4 × 1021 s−1·cm−3 to 7 × 1021 s−1·cm−3 in DSSCs based on optical modelling analysis. The modelling analysis of optical processes inside TNT-based DSSCs using generalized transfer matrix method (GTMM) revealed that the amount of dye and TNT lengths were critical factors influencing the performance of DSSCs, which is consistent with the experimental results.

scholarly journals Influence Applied Potential on the Formation of Self-Organized ZnO Nanorod Film and Its Photoelectrochemical Response

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Nur Azimah Abd Samad ◽  
Chin Wei Lai ◽  
Sharifah Bee Abd Hamid
Keyword(s):  
Electrochemical Deposition ◽  
Photogenerated Electron ◽  
Average Diameter ◽  
Deposition Process ◽  
Photocurrent Density ◽  
Hydrogen Gas ◽  
Zno Nanorod ◽  
Applied Potential ◽  
Self Organized ◽  
Production Of Hydrogen

The present paper reports on the facile formation of ZnO nanorod photocatalyst electrodeposited on Zn foil in the production of hydrogen gas via water photoelectrolysis. Based on the results, ZnO nanorod films were successfully grown via electrochemical deposition in an optimum electrolyte set of 0.5 mM zinc chloride and 0.1 M potassium chloride at pH level of 5-6 and electrochemical deposition temperature of around 70°C. The study was also conducted at a very low stirring rate with different applied potentials. Applied potential was one of the crucial aspects in the formation of self-organized ZnO nanorod film via control of the field-assisted dissolution and field-assisted deposition rates during the electrochemical deposition process. Interestingly, low applied potentials of 1 V during electrochemical deposition produced a high aspect ratio and density of self-organized ZnO nanorod distribution on the Zn substrate with an average diameter and length of ~37.9 nm and ~249.5 nm, respectively. Therefore, it exhibited a high photocurrent density that reached 17.8 mA/cm2under ultraviolet illumination and 12.94 mA/cm2under visible illumination. This behaviour was attributed to the faster transport of photogenerated electron/hole pairs in the nanorod’s one-dimensional wall surface, which prevented backward reactions and further reduced the number of recombination centres.

scholarly journals Betalain Pigments as Natural Photosensitizers for Dye-Sensitized Solar Cells: The Effect of Dye pH on the Photoelectric Parameters

2015 ◽  
Vol 55 ◽  
pp. 86-93 ◽  
Author(s):  
Kasim Uthman Isah ◽  
Umar Ahmadu ◽  
Adamu Idris ◽  
Mohammed Isah Kimpa ◽  
Uno Essang Uno ◽  
...  
Keyword(s):  
Solar Cells ◽  
Fill Factor ◽  
Dye Sensitized Solar Cells ◽  
Photocurrent Density ◽  
Dye Sensitizer ◽  
Dye Sensitized ◽  
Ph Values ◽  
Sensitized Solar Cells ◽  
Extracting Solvent ◽  
Bougainvillea Glabra

Dye-sensitized solar cells (DSSC) were fabricated using red Bougainvillea glabra flower dye extracts as natural dye sensitizers at three dye pH values of 1.23, 3.0 and 5.7. Water was used as dye extracting solvent. Dye-sensitized solar cells (DSSCs) from dye extract of pH 3.0 had the highest photocurrent density J of 3.72 mA/cm2 and fill factor FF of 0.59. While the DSSCs from dye sensitizer pHs of 1.23 and 5.7 had Jsc of 1.13 mA/cm2 and 2.27 mA/cm2, and fill factors of 0.43 and 0.61 respectively. The maximum powers Pmax of the DSSCs were 0.50, 1.64 and 0.94 mW/cm2 for dye sensitizer pH of 1.23, 3.0 and 5.7 respectively.

scholarly journals Fabrication and Characterization of Dye-Sensitized Solar Cells for Greenhouse Application

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Jeum-Jong Kim ◽  
Mangu Kang ◽  
Ock Keum Kwak ◽  
Yong-Jin Yoon ◽  
Kil Sik Min ◽  
...  
Keyword(s):  
Solar Cells ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Photocurrent Density ◽  
Open Circuit ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

We have developed dye-sensitized solar cells using novel sensitizers with enhanced transmittance of red (625–675 nm) and blue (425–475 nm) wavebands to control the illumination condition in the greenhouse. Novel ruthenium bipyridyl sensitizers with general formulas (Me3PhN)4[Ru(dcbpy)2(NCS)2] (JJ-7) and (Me3BnN)4[Ru(dcbpy)2(NCS)2] (JJ-9) have been synthesized and demonstrated as efficient sensitizers in dye-sensitized solar cells for greenhouse application. Under standard AM 1.5 sunlight, the solar cell ofJJ-7using a liquid-based electrolyte exhibits a short-circuit photocurrent density of 8.49 mA/cm2, an open-circuit voltage of 0.83 V, and a fill factor of 0.71, corresponding to an overall conversion efficiency of 4.96% on 5 μm TiO2film. The transmittance ofJJ-7andJJ-9shows 62.0% and 61.0% at 660 nm and 18.0% and 15.0% at 440 nm for cultivation on 5 μm TiO2film, respectively.

scholarly journals Electrochemical Deposition of Te and Se on Flat TiO2for Solar Cell Application

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Seigo Ito ◽  
Noriyuki Kitagawa ◽  
Takahiro Shibahara ◽  
Hitoshi Nishino
Keyword(s):  
Electrochemical Deposition ◽  
Electron Spectroscopy ◽  
Auger Electron ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Photocurrent Density ◽  
Open Circuit ◽  
Back Contact ◽  
Vacuum Deposition ◽  
Solar Cell Application

Te and Se layers were deposited on〈glass/FTO/flat-TiO2〉by electrochemical deposition. The Te-Se-stacked layer was annealed at 200°C, and then, the migration of Te into the Se layer by annealing was confirmed using auger electron spectroscopy (AES), which was performed by Te doping on the Se layer. Au back contact was coated by vacuum deposition on the Te-doped Se layer, resulting in superstrate-structured solar cells of〈glass/FTO/flat-TiO2/Se-doped Te/Au〉with a 0.50 V open-circuit voltage, 6.4 mA/cm2photocurrent density, 0.36 fill factor, and 1.17% conversion efficiency.

scholarly journals TheCortinariusFungi Dyes as Sensitizers in Dye-Sensitized Solar Cells

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Maciej Zalas ◽  
Błażej Gierczyk ◽  
Hubert Bogacki ◽  
Grzegorz Schroeder
Keyword(s):  
Solar Cells ◽  
Fill Factor ◽  
Dye Sensitized Solar Cells ◽  
Photocurrent Density ◽  
Natural Dyes ◽  
Conversion Process ◽  
Dye Sensitized ◽  
Vis Spectroscopy ◽  
First Time ◽  
Sensitized Solar Cells

The dye-sensitized solar cells have been for the first time prepared usingCortinariusfungi extracts as a source of sensitizing dyes. The seven species ofCortinariusgroup, collected in the East Poland, have been used to obtain crude extracts of natural dyes used as sensitizing solutions to prepare DSSCs working electrodes. Extracts and sensitized electrodes have been well characterized by UV-Vis spectroscopy measurements. The device sensitized byCortinarius sanguineusextract has been found the most active in photon-to-current conversion process with efficiencyη=0.64%, fill factorFF=65.9%, photocurrent densityJSC=1.79 mA/cm2, and photovoltageVOC=541 mV.

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