Exact analytical analysis of current density–voltage curves of dye-sensitized solar cells

Solar Energy ◽  
2015 ◽  
Vol 115 ◽  
pp. 390-395 ◽  
Author(s):  
Subrata Sarker ◽  
Hyun Woo Seo ◽  
Ki-Seong Lee ◽  
Young-Ku Jin ◽  
Hyunchul Ju ◽  
...  
Keyword(s):  
Solar Cells ◽  
Current Density ◽  
Dye Sensitized Solar Cells ◽  
Analytical Analysis ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

On the Hysteresis of Current Density-Voltage Curves of Dye-sensitized Solar Cells

2015 ◽  
Vol 182 ◽  
pp. 493-499 ◽  
Author(s):  
Subrata Sarker ◽  
Hyun Woo Seo ◽  
Young-Ku Jin ◽  
Ki-Seong Lee ◽  
Minku Lee ◽  
...  
Keyword(s):  
Solar Cells ◽  
Current Density ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

scholarly journals Alkali Iodide Deep Eutectic Solvents as Alternative Electrolytes for Dye Sensitized Solar Cells

2021 ◽  
Vol 2 (2) ◽  
pp. 222-236
Author(s):  
Hugo Cruz ◽  
Ana Lucia Pinto ◽  
Noémi Jordão ◽  
Luísa A. Neves ◽  
Luís C. Branco
Keyword(s):  
Solar Cells ◽  
Current Density ◽  
Electrochemical Impedance ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Deep Eutectic Solvents ◽  
Transport Processes ◽  
Experimental Conditions ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Different alkali deep eutectic solvents (DES), such as LiI:nEG, NaI:nEG, and KI:nEG, have been tested as electrolytes for dye sensitized solar cells (DSSCs). These DSSCs were prepared using pure DES or, alternatively, DES combined with different amounts of iodine (I2). The most important parameters, such as open circuit voltage (VOC), short circuit current density (JSC), fill factor (FF), and the overall conversion efficiency (η), were evaluated. Some DES seem to be promising candidates for DSSC applications, since they present higher VOC (up to 140 mV), similar FF values but less current density values, when compared with a reference electrolyte in the same experimental conditions. Additionally, electrochemical impedance spectroscopy (EIS) has been performed to elucidate the charge transfer and transport processes that occur in DSSCs. The values of different resistance (Ω·cm2) phenomena and recombination/relaxation time (s) for each process have been calculated. The best-performance was obtained for DES-based electrolyte, KI:EG (containing 0.5 mol% I2) showing an efficiency of 2.3%. The efficiency of this DES-based electrolyte is comparable to other literature systems, but the device stability is higher (only after seven months the performance of the device drop to 60%).

Approach to tune short-circuit current and open-circuit voltage of dye-sensitized solar cells: π-linker modification and photoanode selection

RSC Advances ◽  
2014 ◽  
Vol 4 (80) ◽  
pp. 42252-42259 ◽  
Author(s):  
Shengbo Zhu ◽  
Zhongwei An ◽  
Xinbing Chen ◽  
Pei Chen ◽  
Qianfeng Liu
Keyword(s):  
Solar Cells ◽  
Current Density ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

The modification of the π-linker of cyclic thiourea functionalized dyes has a significant effect on the short-circuit current density and open-circuit voltage of dye-sensitized solar cells.

Electrodeposition of ZnO for Application in Dye-sensitized Solar Cells

2013 ◽  
Vol 16 (3) ◽  
pp. 209-215 ◽  
Author(s):  
F. I. Lizama Tzec ◽  
M. A. Aguilar Frutis ◽  
G Rodríguez Gattorno ◽  
G. Oskam
Keyword(s):  
Solar Cells ◽  
Current Density ◽  
Dye Sensitized Solar Cells ◽  
Zno Films ◽  
Film Morphology ◽  
Plating Bath ◽  
Dye Sensitized ◽  
Cell Conversion ◽  
Current Densities ◽  
Sensitized Solar Cells

ZnO has been electrodeposited from 0.5 M Zn(NO3)2 at pH 4.5 with and without polyethylene glycol (PEG) as additive. Cyclic voltammetry on FTO substrates reveals two electrochemical regimes, where reduction of nitrate and water are rate determining, respectively. ZnO films were galvanostatically electrodeposited as a function of the deposition current density: at low current densities, where nitrate reduction is rate determining, highly crystalline ZnO films were obtained, whereas amorphous ZnO films were obtained at higher current densities, where water reduction dominates. The amorphous films transform to crystalline ZnO upon sintering, and SEM images show that the presence of PEG results in a homogeneous film morphology. The films were used for the fabrication of dye-sensitized solar cells (DSSCs), resulting in solar cell conversion efficiencies of up to 1.4% for non-sintered ZnO films deposited at low current density (without PEG), while the best cells were obtained with films electrodeposited from the plating bath with 0.15 mM PEG with efficiencies of up to 1.8% for sintered films prepared at higher current density. These results illustrate that the presence of PEG in the plating bath optimizes the film morphology and, hence, the performance of ZnO-based dye-sensitized solar cells.

Effect of Natural and Synthetic Dyes on the Performance of Dye-Sensitized Solar Cells Based on ZnO Nanorods Semiconductor

2014 ◽  
Vol 699 ◽  
pp. 577-582 ◽  
Author(s):  
Suyitno ◽  
Dian Noor Rachmad ◽  
Zainal Arifin ◽  
Trisma Jaya Saputra ◽  
Muhammad Anwar Omid ◽  
...  
Keyword(s):  
Solar Cells ◽  
Current Density ◽  
Zno Nanorods ◽  
Dye Sensitized Solar Cells ◽  
Natural Dye ◽  
Oxide Glass ◽  
Synthetic Dyes ◽  
Dye Sensitized ◽  
Vis Spectroscopy ◽  
Sensitized Solar Cells

The compatibility between natural dyes and semiconductors to produce a good performance of dye-sensitized solar cells plays an important role. The dyes from papaya leaves, mangosteen pericarps, beetroots, and N719 were investigated as sensitizers in the ZnO nanorods-based dye-sensitized solar cells. The ZnO film-coated fluorine-doped tin oxide glass substrates were prepared using a doctor blade method, followed by sintering at 450 °C. Meanwhile, the counter electrode contained of chemically deposited catalytic platinum coating. The working electrodes were first immersed in the N719 dye solution and the respective natural dye solutions at corresponding concentrations of 8 g/100 mL and 21 g/100 mL. The absorptance spectra of the dyes and dye-loaded semiconductor-working electrode were obtained by UV-Vis spectroscopy. In addition, the Fourier transform infrared spectroscopy was used to determine the characteristic functionalities of the dye molecules. Furthermore, N719-based DSSC displayed the highest efficiency (0.47%) whereas papaya leaf-based DSSC achieved the highest efficiency (0.17%) amongst the studied natural dye-based DSSCs. The improved efficiency noted in the natural dye-based DSSC was attributed to the increased current density value. The high absorptance and low electrical resistance of the DSSC loaded with papaya leaf-based dye (concentration: 8 g/100 mL) contributed to the high generated current density value. However, further studies are required to improve the fill factor properties of these solar cells that were < 33%.

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