Photoelectrochemical Behavior of the Cell FTO/TiO2/CeO2/N719 Obtained from the Pechini and Precipitation of Cerium Oxide Methods

Dias, Bianca Vanjura; Tractz, Gideã Taques; Viomar, Aline; Maia, Guilherme Arielo Rodrigues; Cunha, Maico Taras da; Rodrigues, Paulo Rogério Pinto

doi:10.1007/s11664-018-6465-5

Cited by 22 publications

(10 citation statements)

References 27 publications

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“…It can be seen in Figure 6 that all TiO 2 formed systems were sensitized with the presence of the natural dye, because higher values of photocurrent were obtained when compared to the TiO 2 / electrolyte system (DIAS et al,2018). For the Curcuma Longa dye cell, values close to j = 0.6 mA cm -2 were found, and for the beta cell, j = 0.4 mA cm -2 , suggesting that a cell with Curcuma Longa present better efficiency in harvesting light.…”

Section: Resultsmentioning

confidence: 97%

“…Although curcumin produces cells with better current values, it can be seen in the photocronoamperometric curve that it presents a soft degradation rate, and this result can be related to the conjugated double bonds in the structure of the dye, since the TiO 2 in anatase structure is able to react with these regions, degrading the molecule, as demonstrated by Dalponte, 2018. 29,16,17 The photocurrent decay might be related by the diffusional process because when the photocurrent decays, the device is diffusion-limited by the electrolyte, however, the same charge intermediator and assembly, were use in both systems 1. 6 Figure 8 shows current density curves as a function of potential, which is an extremely useful technique, capable of providing more meaningful parameters for a detailed system analysis 9 .…”

Section: Resultsmentioning

confidence: 99%

“…The TiO 2 aqueous paste was prepared as demonstrated by the flowchart in Figure 3. 16,17 The paste was deposited on fluorine-doped tin oxide (FTO ~ 7Ω sq-1) by employing doctor blading method, followed by calcination for 30 minutes at 450 °C, as described in Figure 3. 18 The dye was extracted from saffrom (Curcuma Longa var.)…”

Section: Methodsmentioning

confidence: 99%

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Comparative Study of Curcuma Longa and Beta Extracted Dye Applied on Dye Sensitized Solar Cells

Ayoub¹,

Tractz²,

Dias³

et al. 2019

Rev. Virtual Quim.

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Estudo Comparativo Corante Extraído de Curcuma Longa e Beta Aplicado em Células Solares Sensibilizadas por Corantes Resumo: As células solares sensibilizadas por corante (DSSC) mostraram vantagens, como um método alternativo para reduzir a emissão de gases poluentes e baixos custos de produção. Alguns corantes naturais podem ser aplicados em DSSC, uma vez que possuem moléculas fotossensíveis, como flavonóides e terpenos, presentes na composição cromofórica e nos grupos auxocromos. Esses grupos podem absorver energia do sol gerando células com diferentes parâmetros, devido à estrutura química da molécula. O objetivo deste trabalho é produzir e caracterizar células solares de TiO 2 , com corantes naturais extraídos de Curcuma Longa e Beta, verificando quais apresentam melhores parâmetros fotoquímicos. As técnicas de caracterização empregadas foram: Espectroscopia UV-VIS, Potencial Circuito Aberto em função do tempo (Voc), Fotocronoamperometria (j-t), Curvas de densidade de corrente em função do potencial (j-V) e Espectroscopia de Impedância Eletroquímica (EIS). Os resultados indicaram que a célula produzida com Curcuma Longa é menos resistente ao fluxo de corrente e com maior revestimento sob a superfície do TiO 2 , com parâmetros fotovoltaicos de j = 0,860 mA cm-2 ; Voc = 0,535 V; FF = 0,560 e ɳ = 0,260 %.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Comparative Study of Curcuma Longa and Beta Extracted Dye Applied on Dye Sensitized Solar Cells

Ayoub¹,

Tractz²,

Dias³

et al. 2019

Rev. Virtual Quim.

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show abstract

“…The current density curves (Figure 4) showed decay during illumination, indicating the device is diffusion-limited. As the electrolyte, which regenerates the dye, stay in the reduced state the oxidized dye molecules have to wait for more redox pairs to diffuse into the photo-anode 21,22 . Over time, an increasing number of dye molecules are left in the oxidized state and, therefore, a decrease in the photocurrent is observed.…”

Section: Photochronoamperometry (Pca) Measurementmentioning

confidence: 99%

“…The addition of Nb 2 O 5 increased the efficiency values, being the cell containing Nb 2 O 5 , presenting efficiency of e de η = 1.42%, while the cell constituted only by ZnO showed the efficiency of 0.57%. The increase in efficiency values indicates that the addition of niobium changes the electrical properties of zinc oxide [22][23][24] . Table 1 shows that the cell with addition of Nb 2 O 5 presents an increase in the value of V oc in relation to the cell using the only ZnO, indicating that when adding Nb 2 O 5 occurs an increase of the lifetime of the electron as consequence of the decrease of the recombination processes 24 .…”

Section: Characterization J Sc Vs V Oc Curves Of Solar Cellsmentioning

confidence: 99%

Study of the Nb2O5 Insertion in ZnO to Dye-sensitized Solar Cells

et al. 2019

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Dye-sensitized solar cells (DSSC) have received much attention as an alternative to silicon-based solar cells, due to various advantages. Zinc oxide (ZnO) is an n-type semiconductor employed as photoanode on DSSC. The decrease of charge recombination is an efficient strategy capable of improving the photovoltaic performance of the device. In this perspective, Nb 2 O 5 was added on ZnO solar cells. The oxides were characterized by the X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and X-ray fluorescence (XRF). The photovoltaic parameters were obtained through J-V plots and photocronoamperometry. The results showed that the niobium oxide obtained presented orthorhombic crystal structure and DSSC with the addition of niobium oxide showed better efficiency, of 1.42% when compared the device with only ZnO.

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A review on the current status of dye‐sensitized solar cells: Toward sustainable energy

Korir,

Kibet,

Ngari

2024

Energy Science & Engineering

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Dye‐sensitized solar cells (DSSCs) are among the most attractive third‐generation photovoltaic technologies due to their low toxicity, versatility, roll‐to‐roll compatibility, ultralightness, and attractive power conversion efficiencies (PCEs). However, their transition from the laboratory scale to the industrial scale has been slow due to their inability to compete with silicon‐based cells in terms of efficiencies and stabilities. Research activities on DSSCs have been ongoing for several decades to improve the efficiency and cost‐effectiveness of photovoltaics but these attempts are still inadequate. Their chemical and physical properties must be refined to increase efficiency and commercialization. This review provides a concise overview of the recent advances taking place in the DSSCs research field, including molecular engineering technologies, the quest for superior carrier transport materials (CTMs), efficient sensitizers, and better electrodes. Also, this review compiles knowledge of the historical development of DSSCs, the current advancements such as control of surface morphologies, doping strategies, modeling and simulation, characterization, and recent cutting‐edge research happenings in photovoltaic research. Finally, nanostructured materials that have been used as photoelectrodes and the practical applications of DSSCs in internet of things (IoT) and portable electronics are examined to identify challenges and future advancements. The main aim of this work is to be a pathfinder for scientific researchers in this field exploring various energy harvesting materials and optimization strategies of different components of DSSCs.

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Photoelectrochemical Behavior of the Cell FTO/TiO2/CeO2/N719 Obtained from the Pechini and Precipitation of Cerium Oxide Methods

Cited by 22 publications

References 27 publications

Comparative Study of Curcuma Longa and Beta Extracted Dye Applied on Dye Sensitized Solar Cells

Comparative Study of Curcuma Longa and Beta Extracted Dye Applied on Dye Sensitized Solar Cells

Study of the Nb2O5 Insertion in ZnO to Dye-sensitized Solar Cells

A review on the current status of dye‐sensitized solar cells: Toward sustainable energy

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