scholarly journals Development of a New Class of Thiocyanate-Free Cyclometalated Ruthenium(II) Complex for Sensitizing Nanocrystalline TiO2Solar Cells

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Surya Prakash Singh ◽  
Ashraful Islam ◽  
Masatoshi Yanagida ◽  
Liyuan Han
Keyword(s):  
Fill Factor ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Power Conversion ◽  
Electrical Energy ◽  
Photocurrent Density ◽  
Open Circuit ◽  
Photoelectrochemical Cells ◽  
Broad Absorption ◽  
New Class

We designed and developed a new class of thiocyanate-free cyclometalated ruthenium sensitizers for sensitizing nanocrystalline TiO2solar cells. This complex shows appreciably broad absorption range. Anchoring to nanocrystalline TiO2films for light to electrical energy conversion in regenerative photoelectrochemical cells achieves efficient sensitization to TiO2electrode. With this new sensitizer, there were a power conversion efficiency of 4.76%, a short-circuit photocurrent density of 11.21 mA/cm2, an open-circuit voltage of 0.62 V, and a fill factor of 0.68 obtained under standard AM 1.5 sunlight.

The Impact of Porphyrin Meso-Position Steric Effect on Porphyrin Density on TiO2 Surface of DSSC

2013 ◽  
Vol 683 ◽  
pp. 522-525 ◽  
Author(s):  
Zhe Zeng ◽  
Bao Zhang ◽  
Xiu Jun Liu ◽  
Xiao Peng ◽  
Shu Xian Meng ◽  
...  
Keyword(s):  
Fill Factor ◽  
Steric Effect ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Photocurrent Density ◽  
Open Circuit ◽  
Cell Performance ◽  
Meso Position ◽  
The Impact ◽  
The Relationship

We have synthesized three novel porphyrin-based sensitizers, in which different substituents were introduced to meso- position. The relationship between meso- substituent and cell performance was investigated. We find porphyrin density could be a key point that affect cell device performance. The highest cell performance was obtained with 4-trans-vinyl- (2'-(5',10',15',20'-tetra (4''-isobutylphenyl) porphyrinato zinc(II))yl) benzoic acid, a short circuit photocurrent density of 10.25 mA cm-2 , an open –circuit voltage of 0.74 V, a fill factor of 68%, and a power conversion efficiency of 5.15% under standard AM 1.5 sunlight.

Novel Linear and Hyperbranched Polythiophene Derivatives Containing Diketopyrrolopyrroles as Linking Groups

2015 ◽  
Vol 1771 ◽  
pp. 213-219
Author(s):  
Sheng-Hsiung Yang ◽  
Chia-Hao Hsieh
Keyword(s):  
Fill Factor ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Power Conversion ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Photovoltaic Properties ◽  
Molecular Weights ◽  
Active Layers ◽  
Film State

ABSTRACTThe goal of this research is to synthesize novel linear and hyperbranched polythiophene derivatives containing diketopyrrolopyrrole (DPP) as linking groups, and to investigate thermal, optical, electrochemical, and photovoltaic properties of those derivatives. Polymers with high regioregularity were synthesized via the Universal Grignard metathesis polymerization. Those linear or hyperbranched polythiophenes containing DPP bridging moieties showed higher molecular weights and better thermal stability compared with normal P3HT. The UV-vis absorption spectra of the DPP-containing polymers are similar to that of P3HT in film state, while they show distinct attenuation in fluorescent emission. Finally, all polymers were blended with PC61BM and used as active layers for fabrication of inverted solar devices. The devices based on those DPP-containing polythiophenes revealed the open-circuit voltage (VOC) of 0.55–0.58 V, the short-circuit current (JSC) of 8.62–16.21 mA/cm2, the fill factor (FF) of 36–41%, and the power conversion efficiency (PCE) of 1.73–3.74%.

THIOCYANATE-FREE, PANCHROMATIC RUTHENIUM (II) TERPYRIDINE SENSITIZER HAVING A TRIDENTATE DIETHYLENETRIAMINE LIGAND FOR NEAR-IR SENSITIZATION OF NANOCRYSTALINE TiO2

2011 ◽  
Vol 04 (01) ◽  
pp. 21-24 ◽  
Author(s):  
ASHRAFUL ISLAM ◽  
SURYA PRAKASH SINGH ◽  
LIYUAN HAN
Keyword(s):  
Solar Cell ◽  
Fill Factor ◽  
Short Circuit ◽  
Power Conversion ◽  
Photocurrent Density ◽  
Open Circuit ◽  
Visible Range ◽  
Near Ir ◽  
Maximum Value ◽  
Open Circuit Photovoltage

A thiocyanate-free Ru (II) terpyridine complex containing a tridentate chelating ligand diethylenetriamine, Ru (4,4′, 4″-tricarboxy-2,2′:6′, 2″-terpyridine)(diethylenetriamine) 1 achieves very efficient panchromatic sensitization of nanocrystalline TiO 2 solar cell over the whole visible range extending into the near IR region (ca. 900 nm) with a maximum value of 76% at around 600 nm. A solar energy to electric power conversion efficiency (η) of 7.9% was attained under standard AM 1.5 irradiation (100 mW cm-2) with a short-circuit photocurrent density (J sc ) of 17.5 mA cm-2, an open-circuit photovoltage (V oc ) of 0.67 V, and a fill factor (ff) of 0.68.

Current–voltage characteristics of semiconductor–electrolyte junction solar cells

1981 ◽  
Vol 59 (11) ◽  
pp. 1682-1685 ◽  
Author(s):  
F. El Guibaly ◽  
K. Colbow
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Power Conversion ◽  
Open Circuit ◽  
Transfer Velocity ◽  
Shunt Resistance

An improved model for the semiconductor–electrolyte solar cell is discussed. Charge transfer kinetics, surface recombination, recombination in the quasi neutral region and in the depletion region, as well as the series and shunt resistance of the cell are included in our model. It is shown that the surface transfer velocity of minority carriers across the semiconductor–electrolyte interface affects primarily the open circuit voltage, the fill factor and power conversion efficiency, and only to a lesser degree the short circuit current.As is the case with nonelectrolytic solid state solar cells, the series resistance of the electrochemical cell reduces the fill factor and the conversion efficiency, while the shunt resistance reduces the open circuit voltage of the cell in addition to reducing the fill factor and the power conversion efficiency.

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.

Study of Photoelectrochemical Solar Cell Using WSe2 Crystal

2013 ◽  
Vol 665 ◽  
pp. 330-335 ◽  
Author(s):  
Ripal Parmar ◽  
Dipak Sahay ◽  
R.J. Pathak ◽  
R.K. Shah
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Fill Factor ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Electrical Energy ◽  
Open Circuit ◽  
Cell Parameters ◽  
Photoelectrochemical Solar Cell ◽  
Photoelectrochemical Solar Cells

The solar cells have been used as most promising device to convert light energy into electrical energy. In this paper authors have attempted to fabricate Photoelectrochemical solar cell with semiconductor electrode using TMDCs. The Photoelectrochemical solar cells are the solar cells which convert the solar energy into electrical energy. The photoelectrochemical cells are clean and inexhaustible sources of energy. The photoelectrochemical solar cells are fabricated using WSe2crystal and electrolyte solution of 0.025M I2, 0.5M NaI, 0.5M Na2SO4. Here the WSe2crystals were grown by direct vapour transport technique. In our investigations the solar cell parameters like short circuit current (Isc) and Open circuit voltage (Voc) were measured and from that Fill factor (F.F.) and photoconversion efficiency (η) are investigated. The results obtained shows that the value of efficiency and fill factor of solar cell varies with the illumination intensities.

Simulation of InAIN/Si Single-Heterojunction Solar Cells Using wxAMPS

2014 ◽  
Vol 665 ◽  
pp. 111-114 ◽  
Author(s):  
Ying Huang ◽  
Xiao Ming Shen ◽  
Xiao Feng Wei
Keyword(s):  
Solar Cells ◽  
Fill Factor ◽  
High Efficiency ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Indium Content ◽  
Open Circuit ◽  
Heterojunction Solar Cells ◽  
Si Solar Cells

In this paper, InAlN/Si single-heterojunction solar cells have been theoretically simulated based on wxAMPS software. The photovoltaic parameters, such as open circuit voltage, short circuit current, fill factor and conversion efficiency were investigated with changing the indium content and thickness of n-InAlN layer. Simulation results show that the optimum efficiency of InAlN/Si solar cells is 23.1% under AM 1.5G spectral illuminations, with the indium content and thickness of n-InAlN layer are 0.65 and 600nm, respectively. The simulation would contribute to design and fabricate high efficiency InAlN/Si solar cells in experiment.

Photovoltaic Effects of Bismuth Ferrite and Nd-Doped Barium Titanate Thin Films Prepared by Sol-Gel Method

2014 ◽  
Vol 787 ◽  
pp. 347-351 ◽  
Author(s):  
Chun Lin Fu ◽  
Wei Cai ◽  
Ze Bin Lin ◽  
Wei Hai Jiang
Keyword(s):  
Thin Films ◽  
Barium Titanate ◽  
Short Circuit ◽  
Bismuth Ferrite ◽  
Power Conversion ◽  
Sol Gel ◽  
Photocurrent Density ◽  
Open Circuit ◽  
Doped Barium Titanate ◽  
Open Circuit Photovoltage

Ferroelectric is a great potential material as new solar cells, light driver and optical sensor because of its anomalous photovoltaic effect. Bismuth ferrite and Nd-doped barium titanate thin films were prepared via sol–gel spin-coating method in the present study. The experimental results show that substitution of Nd3+ ions for Ba2+ on A sites leads to the decrease of band gap, and the short circuit photocurrent density, open circuit photovoltage and power conversion efficiency of Nd-doped barium titanate thin films begin to increase and reach the maximum and then decrease as Nd content increases. It has been found that the band gap of bismuth ferrite thin films annealed at 550–650oC was between 2.306 eV and 2.453 eV. The short circuit photocurrent density decreased with the rise of annealing temperature, and the open circuit photovoltage and the power conversion efficiency of bismuth ferrite thin films annealed at 550oC were higher than the thin films annealed at higher temperature.

scholarly journals Optimization of Method and Components of Enzymatic Fuel Cells

2019 ◽  
pp. 143-146
Author(s):  
Ibukun Akinsola ◽  
Aderemi Babatunde Alabi ◽  
Muibat A Soliu ◽  
Taiye Akomolafe
Keyword(s):  
Fuel Cells ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Renewable Energy Sources ◽  
Electrical Power ◽  
Short Circuit Current ◽  
Electrical Energy ◽  
Open Circuit ◽  
Biofuel Cell ◽  
Carbon Electrodes

Enzymatic fuel cells produce electrical power by oxidation of renewable energy sources. An enzymatic glucose biofuel cell uses glucose as fuel and enzymes as biocatalyst, to convert biochemical energy into electrical energy. The applications which need low electrical voltages and low currents have much of the interest in developing enzymatic fuel cells. The cell was constructed using three different materials with different electrodes (Bitter leaf and Copper electrodes (BCu), Bitter leaf and Carbon electrodes (BC) and Water leaf and Carbon electrodes (WC)). The short circuit current and open circuit voltage were measured in micro-ampere (mu A) and milli-volt (mV) respectively at 30 minutes interval over the period of 12 hours (from dawn to dusk). The results which show that fuel cells constructed using bitter leaf with carbon electrode has the highest open circuit voltage, short circuit current and generated power of 162.8~mV, 1.65~ mu A and 268.62~nW respectively at 720~mins is obtained from the plots generated by the use of Microsoft Excel. The results show that all short circuit currents, voltages and powers generated increases with time and this is as a result of the exposure to solar radiation during the period of taking the measurement.

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