Performance of Natural Dye and Counter Electrode from Robusta Coffee Beans Peel Waste for Fabrication of Dye-Sensitized Solar Cell (DSSC)

Setiawan, Tomi; Subekti, Wahyu Y.; Nur’Adya, S S; Ilmiah, Khusnul; Ulfa, Siti Mariyah

doi:10.1088/1757-899x/299/1/012073

Cited by 4 publications

(4 citation statements)

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“…Similar results have already been shown [42], but in our case the spectra were noisy in the UV values, with several peaks also affected by the presence of a caffeine-band around 275 nm [43]. Recently, Setiawan and col. [44] extracted anthocyanins from coffee bean peels. The extract was used as the natural dye, and the solid waste after the extraction process was carbonated and used to prepare counter electrodes with different thicknesses.…”

Section: Dyes Preparation and Characterizationmentioning

confidence: 99%

Optimizing a Simple Natural Dye Production Method for Dye-Sensitized Solar Cells: Examples for Betalain (Bougainvillea and Beetroot Extracts) and Anthocyanin Dyes

García-Salinas

Ariza

2019

Applied Sciences

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We present a study about the sensitizers extracted from natural resources. This paper focuses on how to select, extract and characterize natural dyes, giving some guides to establish a protocol for the whole process of fabricating and using these dyes. The influence of the extraction solvent and method, and of parameters such as pH are analyzed. Also, dye precursor and dye extract stability have been studied, as well as how the dye adsorbs onto substrates and the effect of mixing or concentrating the extracts. Results concerning betalain pigments present in bougainvillea and beetroot extracts, and anthocyanins in eggplant extracts, analyzed by using UV-Vis spectrometry, are included. As an example of application, we report procedures intended to test and enhance the dye potential as a main component of dye-sensitized solar cells (DSSCs). DSSCs mimic nature’s photosynthesis and have some advantages like an easy and low-cost fabrication procedure. Their efficiency depends on its design and fabrication process and also on the different components involved. Hence, optimizing each component is essential to achieve the best performance, and thus the dye used as a sensitizer is crucial. We fabricate cells by using a simple procedure: As the interest is focused on the sensitizer, the same consecutive steps are followed, varying only the dye extract. Among all the natural-dyes tested, beetroot extract reaches up to 0.47% cell efficiency, which is near the highest values found in literature for this pigment.

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Section: Dyes Preparation and Characterizationmentioning

confidence: 99%

Optimizing a Simple Natural Dye Production Method for Dye-Sensitized Solar Cells: Examples for Betalain (Bougainvillea and Beetroot Extracts) and Anthocyanin Dyes

García-Salinas

Ariza

2019

Applied Sciences

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“…The vibrational frequencies obtained by FTIR spectroscopy can be observed in Figure 3 ; the graphs show a well-defined peak at 1000 cm −1 and these peaks correspond to the anthocyanins [ 70 , 71 ]. After the stabilization with ZnO nanoparticles, most of the peaks diminish or disappear, suggesting an interaction between the nanoparticles and the anthocyanin extracts.…”

Section: Resultsmentioning

confidence: 99%

“…After the stabilization with ZnO nanoparticles, most of the peaks diminish or disappear, suggesting an interaction between the nanoparticles and the anthocyanin extracts. The interaction changes the usual vibrational frequencies of the functional groups; however, the anthocyanins’ reference peak at 1000 cm −1 remains with no apparent changes in all of the graphs [ 71 ]. According to previous reports [ 72 ], ZnO can bond with –OH functional groups by forming hydrogen bonds between the zinc and the –OH in the positions R1, R2, R5, or R7.…”

Section: Resultsmentioning

confidence: 99%

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Stabilization of Anthocyanins from Coffee (Coffea arabica L.) Husks and In Vivo Evaluation of Their Antioxidant Activity

et al. 2023

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Coffee (Coffea arabica L.) is one of the most popular and widely consumed products throughout the world, mainly due to its taste, aroma, caffeine content, and natural antioxidants. Among those antioxidants, anthocyanins are one of the most important natural pigments, which can be found in coffee husks. It is widely known that anthocyanins have multiple health benefits partially linked to their antioxidant properties. However, anthocyanins have low stability and are sensitive to all types of changes. In order to prevent its degradation, anthocyanins can be stabilized with nanoparticles. Thus, the main objective of this study was to evaluate the stability of the anthocyanins extracted from coffee husks, using three different extracting agents (ethanol, methanol, and water) and stabilizing them through conjugation with zinc oxide nanoparticles. The anthocyanins extracts were mainly composed of cyanidin-3-rutinoside (97%) and the total phenolic compounds of the fresh extracts were 458.97 ± 11.32 (methanol), 373.53 ± 12.74 (ethanol), and 369.85 ± 15.93 (water) mg GAE/g. On the other hand, the total phenolic compounds of the nanoparticle–anthocyanin conjugates underwent no significant changes after stabilization as the major loss was less than 3%. Furthermore, the percentage of anthocyanins’ degradation was less than 5% after 12 weeks of storage. On top of that, fresh anthocyanin extracts and anthocyanin–nanoparticle conjugates exhibited a strong protective effect against oxidative stress and increased the survival rate of Caenorhabditis elegans.

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Natural pigments: Origin and applications in dye sensitized solar cells

Sharma

Singh

et al. 2021

Materials Today: Proceedings

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Performance of Natural Dye and Counter Electrode from Robusta Coffee Beans Peel Waste for Fabrication of Dye-Sensitized Solar Cell (DSSC)

Cited by 4 publications

References 8 publications

Optimizing a Simple Natural Dye Production Method for Dye-Sensitized Solar Cells: Examples for Betalain (Bougainvillea and Beetroot Extracts) and Anthocyanin Dyes

Optimizing a Simple Natural Dye Production Method for Dye-Sensitized Solar Cells: Examples for Betalain (Bougainvillea and Beetroot Extracts) and Anthocyanin Dyes

Stabilization of Anthocyanins from Coffee (Coffea arabica L.) Husks and In Vivo Evaluation of Their Antioxidant Activity

Natural pigments: Origin and applications in dye sensitized solar cells

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