THE CONDUCTIVITY STUDY OF HYBRID SOLAR CELLS OF TIO2 AND DOPED WITH BIXA ORELLANA FOR SOLAR CELLS APPLICATION

The application of nature dyes was explored for solar cells due to several advantages for green technology. These can be supporting in renewable energy alternatives, which must include solar energy. This system was fabricated as hybrid solar cells, which consist of organic and non-organic materials. Metal oxide semiconductor (MOS), TiO2, was selected as charge separation and transport. Bixa orellana used as extracted natural dyes solution in order to enhance the absorption of photons. The dyes were extracted by using immerging in methanol solution and left until dyes being extracted. The dyes were coated on ITO glass by using Electrochemical Impedance Spectroscopy (EIS) varied by 1, 3, 5, 7 and 10 layers of scan. This work focuses on conductivity and charge carrier study of thin film. The result shows the conductivity was increase due to several parameters that are, thickness of thin films, and intensity of light, mixture of natural dyes and concentration of dyes solution. The conductivity was then supported with the energy band gap via UV-Vis Spectroscopy.

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A novel electrochemical comparative sensing interface of MgO nanoparticles synthesized by different methods

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406217722806 ◽

2017 ◽

Vol 233 (3) ◽

pp. 753-762 ◽

Cited By ~ 1

Author(s):

Utkarsh Jain ◽

CS Pundir ◽

Shaivya Gupta ◽

Nidhi Chauhan

Keyword(s):

Electrochemical Impedance ◽

Chemical Reduction ◽

Cost Effective ◽

Green Technology ◽

Mgo Nanoparticles ◽

Transmission Electron ◽

Impedance Spectroscopy Study ◽

Vis Spectroscopy ◽

Reduction Methods ◽

Average Size

Recent advancements in nanotechnology, for the biosynthesis of metal nanoparticles through enormous techniques, showed multidimensional developments. One among many facets of nanotechnology is to procure and adopt new advancements for green technology over chemical reduction synthesis. This adaptation for acquiring green nanotechnology leads us to a new dimension of nanobiotechnology. In order to imply one such efforts, in this study the emphasis is being laid on the synthesis of MgO nanoparticles using green technology and eliminating chemical reduction methods. Different characterization techniques such as UV–Vis spectroscopy, transmission electron microscopy, and dynamic light scattering were used to carry out the experiments. The average size of MgO nanoparticles were obtained in the range of 85–95 nm, when synthesized by various sources. The extracts of plants were capable of producing MgO nanoparticles efficiently and exhibited good results during cyclic voltammetry and electrochemical impedance spectroscopy study. The electrode modified with MgO nanoparticles (plant extract) showed good stability (90 days) and high conductivity. This study reports cost-effective and environment-friendly method for synthesis of MgO nanoparticles using plant extracts. The process is rapid, simple, and convenient and can be used as an alternative to chemical method.

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The Conjugated Phenylene Polymer-Modified Photoanodes for Quantum Dot-Sensitized Solar Cells

Journal of Nanomaterials ◽

10.1155/2017/9048279 ◽

2017 ◽

Vol 2017 ◽

pp. 1-11 ◽

Cited By ~ 1

Author(s):

So-Ra Lee ◽

Da-Seul Kim ◽

Seong-Ho Choi

Keyword(s):

Solar Cells ◽

Quantum Dot ◽

Photoelectron Spectroscopy ◽

Electrochemical Impedance ◽

Electrochemical Polymerization ◽

Contact Angles ◽

Open Circuit ◽

Cdse Qds ◽

Ito Glass ◽

Sensitized Solar Cells

Five types of conjugated phenylene polymer-modified photoanodes for quantum dot-sensitized solar cells (QDSSCs) were prepared by immobilization of CdSe QDs after electrochemical polymerization of functionalized phenyldiazonium salts onto ITO glass electrodes. The successful preparation of the conjugated phenylene polymer-modified photoanodes for QDSSCs was confirmed by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), FT-IR spectroscopy, UV-visible spectroscopy, contact angles, and electrochemical impedance spectroscopy. The open-circuit voltage and fill factor in QDSSCs with the conjugated phenylene polymer with -COOH photoanodes were achieved at 0.52 V and 76.8%, respectively, and the energy conversion efficiency was improved to 2.73% using the conjugated phenylene polymer with -COOH photoanodes.

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PHOTODEGRADATION EFFECT ON OPTICAL PROPERTIES OF MANGOSTEEN PERICARP, BLACK GRAPE PEEL AND VIOLET BOUGAINVILLEA FLOWERS AS PHOTOSENSITIZER FOR SOLAR CELL APPLICATION

Jurnal Teknologi ◽

10.11113/jurnalteknologi.v83.16729 ◽

2021 ◽

Vol 83 (5) ◽

pp. 109-117

Author(s):

Nurul Alfatihah Mohd Arifin ◽

Hasiah Salleh ◽

Ahmad Nazri Dagang ◽

Nik Aziz Nik Ali ◽

Nur Salihah Alias ◽

...

Keyword(s):

Solar Cell ◽

Chlorophyll A ◽

Alternative Energy ◽

Green Energy ◽

Natural Dyes ◽

Hybrid Solar Cells ◽

Solar Cell Application ◽

Alternative Energy Sources ◽

Vis Spectroscopy ◽

Grape Peel

Alternative energy sources such as wind, solar, biomass, hydro, and geothermal have become imperative for green energy solutions. A growing demand of hybrid solar cells is yet another promising option toward green energy providing the opportunity to explore natural dye extracts from the plant. The natural dyes were extracted from mangosteen pericarp (MP), black grape peel (BGP), and violet bougainvillea flowers (VBF), respectively. The natural dyes were then undergoing degradation under exposure to the light for six weeks. UV-vis spectroscopy was used to characterize the optical absorption of the natural dyes. UV-vis result showed that MP absorbs three ranges of light, 400-600 nm (chlorophyll a), 530- 550 nm (anthocyanin), and 650-670 nm (chlorophyll a). After 6 weeks, MP gives the best in sustaining itself by having the lowest percentage of photodegradation (50.73 %) compare to BGP (83.88%) and VBF (65.66%). The natural dyes gave the FTIR vibration peaks of OH, C-H, C=O, and C-O-C functional groups. Therefore, this study provides significant contributes towards explaining the potential of MP as the promising photosensitizer in the development of the hybrid solar cell.

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Theoretical and experimental study of solar cells based on nanostructured films of TiO2 sensitized with natural dyes extracted from Zea mays and Bixa orellana

RSC Advances ◽

10.1039/d1ra01043c ◽

2021 ◽

Vol 11 (16) ◽

pp. 9086-9097

Author(s):

Arnold A. Huamán ◽

Michael R. Celestino ◽

María E. Quintana

Keyword(s):

Experimental Study ◽

Zea Mays ◽

Titanium Dioxide ◽

Solar Cells ◽

Natural Dyes ◽

Bixa Orellana ◽

Nanostructured Films ◽

Nanoporous Titanium Dioxide

Natural dyes were extracted from Zea mays and Bixa orellana, products from Peru, for the sensitization of nanoporous titanium dioxide (TiO2) films.

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Extraction and Characterization of Natural Dyes Applied to ZnO-based DSSC

MRS Proceedings ◽

10.1557/opl.2013.953 ◽

2013 ◽

Vol 1537 ◽

Cited By ~ 1

Author(s):

G. Perez Hernandez ◽

J. Pantoja Enriquez ◽

C. I. Ramos-Villegas ◽

M. Gonzalez-Solano ◽

G. Oskam ◽

...

Keyword(s):

Solar Cells ◽

Broad Band ◽

Dye Sensitized Solar Cells ◽

Visible Region ◽

Natural Dyes ◽

Walnut Shell ◽

Ruthenium Polypyridyl ◽

Mangrove Tree ◽

Vis Spectroscopy ◽

Stretching Vibration

ABSTRACTThe dye-sensitized solar cells (DSSC) are a technological and economical alternative to conventional p-n junction solar cells. The DSSC is composed of a transparent conducting electrode (SnO2:F) coated by a porous, nanocrystalline film of n-ZnO to which dye molecules are attached, an organic electrolyte containing a reduction-oxidation couple, and finally a counter-electrode (glass/SnO2:F) coated by a thin film of platinum. The most efficient dyes for DSSCs are based on Ruthenium polypyridyl complexes, related to the high absorption coefficient in the entire visible range and the efficient injection of electrons into the conduction band of ZnO. However, the ruthenium polypyridyl complex contains a heavy metal of relatively high cost, and synthetic routes are complicated with low yields. Moreover, natural dyes in addition to their availability, are cost-effective, non-toxic and biodegradable materials, and can be extracted by simple procedures. In this paper we report the extraction of natural dyes from the stems of mangrove (D1) and tinto (D2) trees as well as from walnut (D3) shell. First, it was necessary to dehydrate the materials, after which extraction was performed using ethanol, water and sodium hydroxide solution. The dyes were characterized using UV-visible and infrared spectroscopy. The analysis of the infrared spectra shows an intense and broad band related to OH bond stretching vibration at 3393, 3442 and 3390 cm-1 for the mangrove tree, tinto tree and walnut shell, respectively. At 1051, 1123 and 1050 cm-1, there was a very strong absorption due to the stretching vibration of CO group, for the mangrove tree, tinto tree and walnut shell, respectively. These results indicate that the functional group for bonding to the ZnO is -OH for these dyes. The results of the U-Vis spectroscopy show that the strongest absorption in the visible region is provided by dyes of the tinto and mangrove trees. The current - voltage curve of a preliminary ZnO-DSSC sensitized with the natural dye of the mangrove tree bark is presented.

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Low Temperature Synthesis of Anatase TiO2 Nanoparticles and its Application in Nanocrystalline Thin Films

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.778.86 ◽

2018 ◽

Vol 778 ◽

pp. 86-90

Author(s):

Muhammad Yasir Khan ◽

Ali Dad Chandio ◽

Muhammad Sohail ◽

Muhammad Arsalan ◽

Muhammad Wasim Akhtar ◽

...

Keyword(s):

Thin Films ◽

Solar Cells ◽

Low Temperature ◽

Electrochemical Impedance ◽

Low Cost ◽

Anatase Phase ◽

Sol Gel ◽

Dye Sensitized Solar Cells ◽

Sem Analysis ◽

Vis Spectroscopy

The nano-sized TiO2is an important material based on its application for solar cells. The low-cost synthesis of nano-sized TiO2is of high demand for commercial purposes. Synthesis of TiO2nanoparticles was achieved via the low-temperature Sol-gel method. Surface morphology was confirmed from SEM analysis, which showed that particle size is in the range of nanometer with no aggregation, The XRD results confirm the formation of anatase phase with high crystallinity. Furthermore, as prepared nano-sized TiO2particles were developed as sol-gel ink which was later deposited by spin coating on glass substrate with controlled spinning speed thereafter structural and optical properties were characterized by UV-vis spectroscopy, electrochemical impedance spectroscopy and DSC-TGA. The low-cost synthesis of TiO2nanoparticles with highly conductive thin films can be used as a potential material for future dye-sensitized solar cells

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Dye-Sensitized Solar Cells (DSSCs) Based on Extracted Natural Dyes

Journal of Nanomaterials ◽

10.1155/2019/1867271 ◽

2019 ◽

Vol 2019 ◽

pp. 1-10 ◽

Cited By ~ 21

Author(s):

Ahmed M. Ammar ◽

Hemdan S. H. Mohamed ◽

Moataz M. K. Yousef ◽

Ghada M. Abdel-Hafez ◽

Ahmed S. Hassanien ◽

...

Keyword(s):

Solar Cells ◽

Electrochemical Impedance ◽

Dye Sensitized Solar Cells ◽

Natural Dyes ◽

Time Resolved ◽

Dye Sensitized ◽

Steady State Time ◽

Conversion Efficiencies ◽

Time Resolved Photoluminescence ◽

Sensitized Solar Cells

Here, three natural dyes were extracted from different fruits and leaves and used as sensitizers for dye-sensitized solar cells (DSSCs). Chlorophyll was extracted from spinach leaves using acetone as a solvent. Anthocyanin was extracted from red cabbage and onion peels using water. Different characterizations for the prepared natural dyes were conducted including UV-vis absorption, FTIR, and steady-state/time-resolved photoluminescence spectroscopy. Various DSSCs based on the extracted dyes were fabricated. The degradation in the power conversion efficiencies was monitored over a week. The effect of the TiO2 mesoporous layers on the efficiency was also studied. The interfaces between the natural dyes and the TiO2 layers were investigated using electrochemical impedance spectroscopy.

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Preparation of natural dyes from salvia and spathodea for TiO2-based dye-sensitized solar cells (DSSCs) and their electrochemical impedance spectroscopic study under light and dark conditions

Bulletin of Materials Science ◽

10.1007/s12034-020-02180-w ◽

2020 ◽

Vol 43 (1) ◽

Author(s):

G M Lohar ◽

D V Rupnawar ◽

R V Shejawal ◽

A V FULARI

Keyword(s):

Solar Cells ◽

Spectroscopic Study ◽

Electrochemical Impedance ◽

Dye Sensitized Solar Cells ◽

Natural Dyes ◽

Dye Sensitized ◽

Dark Conditions ◽

Sensitized Solar Cells ◽

Electrochemical Impedance Spectroscopic

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Improved Performance for Dye-Sensitized Solar Cells Using a Compact TiO2Layer Grown by Sputtering

International Journal of Photoenergy ◽

10.1155/2014/380120 ◽

2014 ◽

Vol 2014 ◽

pp. 1-8 ◽

Cited By ~ 6

Author(s):

Hung-Chih Chang ◽

Ming-Jenq Twu ◽

Chun-Yao Hsu ◽

Ray-Quen Hsu ◽

Chin-Guo Kuo

Keyword(s):

Solar Cells ◽

Short Circuit ◽

Dye Sensitized Solar Cells ◽

Optical Transmittance ◽

Open Circuit ◽

Dye Sensitized ◽

Vis Spectroscopy ◽

Ito Glass ◽

Sensitized Solar Cells ◽

Fto Glass

This work determines the effect of compact TiO2layers that are deposited onto fluorine-doped tin oxide (FTO), to improve the performance of dye-sensitized solar cells (DSSC). A series of compact TiO2layers are prepared using radio frequency (rf) reactive magnetron sputtering. The films are characterized using X-ray diffraction (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM), and UV-Vis spectroscopy. The results show that when the Ar/O2/N2flow rates are 36 : 18 : 9, the photo-induced decomposition of methylene blue and photo-induced hydrophilicity are enhanced. After annealing at 450°C in an atmosphere ambient for 30 min, the compact TiO2layers exhibit higher optical transmittance. The XRD patterns for the TiO2films for FTO/glass show a good crystalline structure and anatase (101) diffraction peaks, which demonstrate a higher crystallinity than the ITO/glass films. As a result of this increase in the short circuit photocurrent density, the open-circuit photovoltage, and the fill factor, the DSSC with the FTO/glass and Pt counter electrode demonstrates a solar conversion efficiency of 7.65%.

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