scholarly journals Dye extracted from Bael leaves as a photosensitizer in dye sensitized solar cell

2021 ◽  
Author(s):  
Samah Alhorani ◽  
Sarvesh Kumar ◽  
Mahaveer Genwa ◽  
P. L. Meena
Keyword(s):  
Ionic Conductivity ◽  
Dye Sensitized Solar Cells ◽  
Green Energy ◽  
The Novel ◽  
Tree Leaves ◽  
Shunt Resistance ◽  
Dye Sensitized ◽  
Tauc Plot ◽  
Dye Extraction ◽  
Tlc Analysis

Abstract This study has explored a new plant source, Bael tree leaves, as an efficient dye extraction towards green energy harvesting through dye-sensitized solar cells (DSSCs). The photosensitizers, photo-absorption, bandgap, and ionic conductivity characteristics of the extracted dye were determined using thin-layer chromatography (TLC), ultraviolet-visible spectroscopy, Tauc plot, and conductivity meter, respectively. Chlorophyll is the main constituent in the extracted dye confirmed by TLC analysis. An optimum concentration (0.2 g/mL) with ionic conductivity of 455 μS/cm of the dye was used as a photoactive layer in DSSC, demonstrating power densities of 1.345 μW/m2 and 8.078 μW/m2 under the illumination of the LED lamp (1555 lx) and tungsten bulb (1926 lx), respectively. Additional parameters, including fill factor (0.26), ideality factor (1.25), characteristic resistance (309 Ω), series resistance (313 Ω), and shunt resistance (662 Ω) of the fabricated DSSCs under tungsten illumination reveal that the novel Bael tree leaves-based dye can harvest green energy efficiently through DSSCs.

Improved ionic conductivity and efficiency of dye-sensitized solar cells with the incorporation of 1-methyl-3-propylimidazolium iodide

Ionics ◽  
2020 ◽  
Vol 26 (6) ◽  
pp. 3173-3183
Author(s):  
Chee Yu Tan ◽  
Norshahirah M. Saidi ◽  
N.K. Farhana ◽  
Fatin Saiha Omar ◽  
Mohammed M. Algaradah ◽  
...  
Keyword(s):  
Solar Cells ◽  
Ionic Conductivity ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

scholarly journals Prunus domestica dye extraction for fabrication of zinc oxide based dye-sensitized solar cells

BIBECHANA ◽  
2015 ◽  
Vol 13 ◽  
pp. 23-28
Author(s):  
Leela Pradhan Joshi
Keyword(s):  
Zinc Oxide ◽  
Solar Cells ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Zinc Nitrate ◽  
Open Circuit ◽  
Dye Sensitized ◽  
Dye Extraction ◽  
Sensitized Solar Cells

Aluminium doped Zinc Oxide (AZO) seed layers were deposited on Fluorine doped Tin Oxide (FTO) substrates using a spin coating technique. These were then immersed in growth solutions of zinc nitrate, hexamethylenetetramine and distilled water to develop nanoplates of Zinc Oxide (ZnO). The nanostructures of ZnO grown on FTO were studied using x-ray diffraction techniques. Dye-sensitized solar cells (DSSC) were fabricated using two prepared electrodes, one of dye-loaded zinc oxide and another that was platinum coated. The electrolyte used was potassium iodide iodine solution. The performance of the assembled DSCCs was tested by drawing an IV curve. The results showed that the short circuit current and open circuit voltages were about 10 microamperes and 270 millivolts respectively.BIBECHANA 13 (2016) 23-28

scholarly journals Characteristics of Dye-Sensitized Solar Cell Assembled from Modified Chitosan-Based Gel Polymer Electrolytes Incorporated with Potassium Iodide

Molecules ◽  
2020 ◽  
Vol 25 (18) ◽  
pp. 4115 ◽  
Author(s):  
Aimi Mahirah Zulkifli ◽  
Nur Izzah Aqilah Mat Said ◽  
Shujahadeen Bakr Aziz ◽  
Elham Mohammed Ali Dannoun ◽  
Shameer Hisham ◽  
...  
Keyword(s):  
Solar Cells ◽  
Ionic Conductivity ◽  
Dielectric Permittivity ◽  
Polymer Electrolyte ◽  
Potassium Iodide ◽  
Polymer Electrolytes ◽  
Dye Sensitized Solar Cells ◽  
Gel Polymer Electrolytes ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

In the present work, phthaloyl chitosan (PhCh)-based gel polymer electrolytes (GPEs) were prepared using dimethylformamide (DMF) as a solvent, ethyl carbonate (EC) as a co-solvent, and a set of five quaternaries of potassium iodide (KI) as a doping salt, which is a mixed composition of iodine (I2). The prepared GPEs were applied to dye-sensitized solar cells (DSSC) to observe the effectiveness of the electrolyte, using mesoporous TiO2, which was sensitized with N3 dye as the sensitizer. The incorporation of the potassium iodide-based redox couple in a polymer electrolyte is fabricated for dye-sensitized solar cells (DSSCs). The number of compositions was based on the chemical equation, which is 1:1 for KI:I2. The electrical performance of prepared GPE systems have been assessed using electrical impedance spectroscopy (EIS), and dielectric permittivity. The improvement in the ionic conductivity of PhCh-based GPE was observed with the rise of salt concentration, and the maximum ionic conductivity (4.94 × 10−2 S cm−1) was achieved for the 0.0012 mol of KI:I2. The study of dielectric permittivity displays that ions with a high dielectric constant are associated with a high concentration of added ions. Furthermore, the gel polymer electrolyte samples were applied to DSSCs to detect the conversion effectiveness of the electrolytes. For electrolytes containing various content of KI:I2 the highest conversion efficiency (η%) of DSSC obtained was 3.57% with a short circuit current density (Jsc) of 20.33 mA cm−2, open-circuit voltage (Voc) of 0.37 V, fill factor (FF) of 0.47, as well as a conductivity of 2.08 × 10−2 S cm−1.

A Nano Quasi-Solid Electrolyte With Modified Nano-Clay Applied to Dye-Sensitized Solar Cells

2010 ◽  
Vol 133 (1) ◽  
Author(s):  
Meng-Cheng Tsui ◽  
Yung-Liang Tung ◽  
Song-Yeu Tsai ◽  
Chung-Wen Lan
Keyword(s):  
Solar Cells ◽  
Ionic Conductivity ◽  
Solid Electrolyte ◽  
Dye Sensitized Solar Cells ◽  
Gel Electrolyte ◽  
Dye Sensitized ◽  
Liquid Electrolytes ◽  
Nano Clay ◽  
Sensitized Solar Cells ◽  
Clay Type

The gel electrolytes for dye-sensitized solar cells (DSSCs) have been reported recently. Such electrolytes have their own liquid electrolyte properties and a quasi-solid electrolyte morphology. In this paper, nano-clay was chosen as gelator and mixed with liquid electrolytes to form clay type nanocomposite gel. This gel electrolyte consists of liquid electrolytes and surface modified nano-clay. The surface modifier makes nano-clay disperse well in liquid electrolytes. Nano-clay mixed with electrolyte will increase its viscosity and it is believed to be helpful in fabricating flexible DSSC. In general, an increase in viscosity will decrease ionic mobility and decrease photovoltaic conversion efficiency. The ionic conductivity was determined by the viscosity of the nano-clay gel with different surface modifiers. The ionic transfer rate of the nano-clay gel electrolyte is controlled by the diffusion and exchange reaction. The clay type gel electrolyte has higher ionic conductivity. Finally, the electrochemistry properties and the DSSC performances for the nano-clay type gel electrolyte have been discussed in this paper.

Evaluation of Annealing Effects on TiO2 Nanorod Arrays for Dye-Sensitized Solar Cells by Equivalent Circuit Analysis

2014 ◽  
Vol 609-610 ◽  
pp. 152-158 ◽  
Author(s):  
Mei Rong Sui ◽  
Xiu Quan Gu
Keyword(s):  
Solar Cells ◽  
Equivalent Circuit ◽  
Dye Sensitized Solar Cells ◽  
Equivalent Circuit Model ◽  
Photocurrent Density ◽  
Nanorod Arrays ◽  
Equivalent Circuit Analysis ◽  
Shunt Resistance ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

TiO2 nanorod arrays (NRA) were synthesized via a facile hydrothermal method for preparing the dye-sensitized solar cells (DSSC). It was found that a post-thermal treatment facilitated enhancing the cell efficiency. The cells containing NRs underwent 500 °C annealing exhibited much higher efficiency than those un-sintered ones. Further, the internal resistance analysis was carried out to reveal the mechanism underlying the DSSC performance improvement. Specifically, the equivalent circuit model was employed to derivate the internal resistances, which was consistent with the experimental results. It was found that the sintered cells exhibited a higher series resistance and a lower shunt resistance than the un-sintered ones, suggesting the higher photocurrent density might result from the larger amount of dye loading.

scholarly journals Highly Conductive Redox-Couple Solid Polymer Electrolyte System: Blend-KI-I2 for Dye-Sensitized Solar Cells

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Ravindra Kumar Gupta ◽  
Hee-Woo Rhee
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Solid Polymer Electrolyte ◽  
Dye Sensitized Solar Cells ◽  
Weight Fraction ◽  
Redox Couple ◽  
Solid Polymer ◽  
Equal Weight ◽  
Electrolyte System ◽  
Dye Sensitized

Ionic conductivity of a redox-couple solid polymer electrolyte system, () blend: [0.9KI : 0.1I2] with in weight fraction, is reported. A blend of poly(ethylene oxide) (abbreviated as PEO) and succinonitrile in equal weight fraction was used as a polymeric matrix instead of the PEO and succinonitrile because of its low-cost, electrical conductivity superior to the PEO, and thermal stability better than the succinonitrile. The electrolyte with showed ionic conductivity of S cm−1 and iodine ion diffusivity of nearly  cm2 s−1 at 25°C. The conductivity and diffusivity values were nearly two orders of magnitude higher than those of the PEO-KI-I2 due to the improved PEO crystallinity. It also exhibited dye-sensitized solar cell efficiency of 2.2% at 100 mW cm−2, which is twice of the cell prepared using the PEO-KI-I2 only.

scholarly journals Performances of spin coated silver doped ZnO photoanode based dye sensitized solar cell

2017 ◽  
Vol 11 (3) ◽  
pp. 213-219 ◽  
Author(s):  
Amrik Singh ◽  
Devendra Mohan ◽  
Singh Ahlawat ◽  
R Richa
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Zno Films ◽  
Zno Film ◽  
Dye Sensitized ◽  
Tauc Plot ◽  
In Doping ◽  
Two Samples ◽  
Doped Zno ◽  
Sensitized Solar Cells

Dye sensitized solar cells (DSSCs) were fabricated using silver doped ZnO films deposited on ITO glass by spin coating method. The crystalline nature of ZnO films was analysed with XRD and SEM technique was used for morphological studies. The XRD pattern confirmed the presence of single phase hexagonal wurtzite ZnO structure, without the presence of secondary phase. The crystallite size of ZnO decreased from 31 nm to 25 nm with increase in doping to 1.5mol% of silver. The UV-visible transmission of the prepared ZnO film was found to be 70-90% and it decreased with increase in doping to 0.5mol% Ag and increased in the film doped with 1.5mol% Ag. The band gap values of the ZnO films with 0, 0.5 and 1.5mol% of silver, determined from Tauc plot, were 3.269, 3.235 and 3.257 eV, respectively. The absorbance peaks of the N719 dye loaded ZnO films were obtained at the wavelengths 310, 350 and 538 nm. The N719 dye loaded ZnO film doped with 0.5mol% Ag has the highest absorbance in the visible region as compared to other two samples. The fill factor values of the pure and ZnO doped with 0.5 and 1.5mol% Ag were 0.47, 0.48 and 0.42, respectively. The short circuit density values for ZnO, ZnO:Ag0.5% and ZnO:Ag1.5% were found to be 1.50, 1.55 and 1.15 A?m/cm2, respectively. The calculated photon to electron efficiencies for the ZnO films with 0, 0.5 and 1.5mol% of silver were 0.42%, 0.44% and 0.27%, respectively. Consequently future prospective of such type of dopants in ZnO film based dye sensitized solar cells seems to be bright.

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