Dye-Sensitized Solar Cells Using Natural Dyes Extracted from Roselle (&amp;lt;i&amp;gt;Hibiscus Sabdariffa&amp;lt;/i&amp;gt;) Flowers and Pawpaw (&amp;lt;i&amp;gt;Carica Papaya&amp;lt;/i&amp;gt;) Leaves as Sensitizers

Danladi, Eli

doi:10.11648/j.jenr.20160501.12

Cited by 18 publications

(8 citation statements)

References 15 publications

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“…According to Danladi et al [12], using natural dyes extracted from roselle flowers and Carica papaya leaves in DSSCs resulted in power conversion efficiencies (PCEs) of 0.046% and 0.022%, respectively. In a similar study, DSSCs that utilized single flame trees and Bougainvillea glabra flowers achieved PCEs of 0.17% and 0.21%, respectively.…”

Section: Research Backgroundmentioning

confidence: 99%

Low-Cost Solar Energy Harvesting: A Study on Dye-Sensitized Solar Cells Using Inthanin Leaf Extract as a Natural Photosensitizer

Onyemowo,

Unpaprom,

Ramaraj

2023

ajarcde

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The world is actively pursuing renewable energy resources to combat environmental pollution and greenhouse gas emissions caused by the burning of fossil fuels. Solar energy is the most abundant, continuously available form of renewable energy, and dye-sensitized solar cells (DSSCs) are being explored as an alternative to traditional silicon-based solar cells due to their low cost of materials, ease of production, and efficiency. The photoanode is a crucial component in DSSCs, and the main challenges faced by these solar cells are charge recombination and low light harvesting ability. This study aims to investigate the efficacy of natural dyes as the sensitizer for the fabrication of DSSCs. Natural pigments were extracted from Inthanin leaves using the solvent extraction technique. The concentration and composition of the pigment were analyzed through pigment analysis utilizing UV a spectrophotometer. Inthanin has a higher chlorophyll a to b ratio. A higher chlorophyll a to b ratio has been shown to be associated with improved light harvesting and electron transport efficiency. This is because chlorophyll a is more efficient at transferring electrons to the electron transport chain than chlorophyll b. The higher chlorophyll a to b ratio could lead to improved electron transfer to the photoanode. The photoelectric parameters of the DSSC were evaluated using I-V characterization. DSSCs coated with Inthanin dye extract produced a short circuit current density (Jsc) of 0.02 mA/cm2, open circuit voltage (Voc) of 0.07 V, fill factor (FF) of 33% and an efficiency (????) of 0.1%.

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Section: Research Backgroundmentioning

confidence: 99%

Low-Cost Solar Energy Harvesting: A Study on Dye-Sensitized Solar Cells Using Inthanin Leaf Extract as a Natural Photosensitizer

Onyemowo,

Unpaprom,

Ramaraj

2023

ajarcde

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“…16 Several dyes are used to improve the DSSC efficiency such as dyes extracted from spinach leaves, Luffa cylindrica-L dyes, dragon fruit, hibiscus and bitter leaf combination, Roselle (Hibiscus sabdariffa) flowers and pawpaw (Carica papaya) sensitisers. [17][18][19][20] The use of extracted dyes from fruits, leaves and flowers is an important point in improving the DSSC efficiency. Therefore, in this work, we tried to improve the DSSC efficiency by using tamarillo, red dragon fruit, red spinach, boat lily flower and purple hibiscus flower as sensitisers.…”

Section: Introductionmentioning

confidence: 99%

The efficiency of natural dyes-based dye sensitised solar cells

Motlan

Siregar

2021

JPS

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ZnO/natural dyes solar cell (DSSC) had been successfully synthesised. The preparation of ZnO thin films was carried out on an indium thin oxide (ITO) glass substrate using the sol-gel spin coating method. The natural dyes were extracted from tamarillo, red dragon fruit, red spinach, boat lily flower and purple hibiscus flower, each cut into small pieces and put into a beaker glass. The sample was then further crushed with a mortar and then milled until it became soft. The extracted dyes were heated for 5 h and diluted with distilled water to obtain dye solutions. The DSSC structure was formed by glueing together the ZnO/dye and a platinum plat by using Surlyn. The ZnO/dye and platinum were successively used as a working electrode and counter electrode. The Surlyn functioned as glue and conductor. The DSSC structure then put on a hot plate with a temperature of 70°C-80°C to enable Surlyn pasted perfectly. Further, electrolyte liquid was injected into the ZnO/dye-platinum structure. The ZnO thin films were characterised by X-ray powder diffraction (XRD), scanning electron microscope (SEM) and UV-Vis spectrometer. The ZnO/natural dyes thin films were formed by dipping the ZnO thin film into natural dyes solution with the ZnO thin films facing up for 24 h to let the dyes adsorbed by the film. DSSC efficiencies were measured by a simple circuit consisting of DSSC, both analogue and digital multimeters. The results showed that the ZnO crystal structure was of wurtzite hexagonal shape with a crystallite size of 27.3 nm, high-density granules with narrow inter granules boundary, and the band-gap was 3.25 eV. The maximum and minimum values of the sensitisers were from red spinach and red dragon fruit which were 3.30 a.u and 2.50 a.u. The DSSC can convert solar energy to electrical energy with power and efficiency of consecutively of 0.101 W cm -2 and 0.278%.

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“…The use of natural dyes have been considered as potential alternatives to the expensive synthetic dyes in enhancing the light response of semiconductor in active layers of solar cells, and have been demonstrated on several solar-cell materials [11][12][13][14][15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Chlorophyll and Betalain as Light-Harvesting Pigments for Nanostructured TiO<sub>2</sub> Based Dye-Sensitized Solar Cells

Danladi¹

2016

JENR

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Chlorophyll and betalain pigments extracted from scent leaves and flower of Bougainvillea Spectabilis were used as sensitizers for nanostructured TiO 2 based dye-sensitized solar cells (DSSCs), and their perfomances were investigated systematically. The light harvesting pigments have shown absorption in broad range of the visible region of the solar spectrum and appreciable adsorption onto the semiconductor surface. The photovoltaic (PV) parameters such as short circuit current density (J SC ), open circuit voltage (V OC ), fill factor (FF), and overall solar conversion efficiency (η) were determined under 100 mAcm -2 . The DSSC fabricated with betalains pigment from Bougainvillea Spectabilis was found to be superior to that obtained from chlorophyll pigment of scent leave (Ocimum Gratissimum). The DSSC gave a short circuit current density of 0.093 mAcm -2 , open circuit voltage of 0.433 V, fill factor of 0.550, and an overall solar conversion efficiency of 0.040%. The cell sensitized with betalains pigment exhibits: (i) ~ 1.90 times improvement in conversion efficiency, (ii) ~ 2.11 times enhancement in photocurrent density, and (iii) ~ 1.38 times improvement in fill factor compared to the results obtained with the chlorophyll sensitized solar cell. The sensitization performance related to interaction between the dye and TiO 2 surface is discussed.

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Dye-Sensitized Solar Cells Using Natural Dyes Extracted from Roselle (<i>Hibiscus Sabdariffa</i>) Flowers and Pawpaw (<i>Carica Papaya</i>) Leaves as Sensitizers

Cited by 18 publications

References 15 publications

Low-Cost Solar Energy Harvesting: A Study on Dye-Sensitized Solar Cells Using Inthanin Leaf Extract as a Natural Photosensitizer

Low-Cost Solar Energy Harvesting: A Study on Dye-Sensitized Solar Cells Using Inthanin Leaf Extract as a Natural Photosensitizer

The efficiency of natural dyes-based dye sensitised solar cells

Chlorophyll and Betalain as Light-Harvesting Pigments for Nanostructured TiO<sub>2</sub> Based Dye-Sensitized Solar Cells

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Dye-Sensitized Solar Cells Using Natural Dyes Extracted from Roselle (&lt;i&gt;Hibiscus Sabdariffa&lt;/i&gt;) Flowers and Pawpaw (&lt;i&gt;Carica Papaya&lt;/i&gt;) Leaves as Sensitizers

Cited by 18 publications

References 15 publications

Low-Cost Solar Energy Harvesting: A Study on Dye-Sensitized Solar Cells Using Inthanin Leaf Extract as a Natural Photosensitizer

Low-Cost Solar Energy Harvesting: A Study on Dye-Sensitized Solar Cells Using Inthanin Leaf Extract as a Natural Photosensitizer

The efficiency of natural dyes-based dye sensitised solar cells

Chlorophyll and Betalain as Light-Harvesting Pigments for Nanostructured TiO&lt;sub&gt;2&lt;/sub&gt; Based Dye-Sensitized Solar Cells

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Dye-Sensitized Solar Cells Using Natural Dyes Extracted from Roselle (<i>Hibiscus Sabdariffa</i>) Flowers and Pawpaw (<i>Carica Papaya</i>) Leaves as Sensitizers

Chlorophyll and Betalain as Light-Harvesting Pigments for Nanostructured TiO<sub>2</sub> Based Dye-Sensitized Solar Cells