Study of the influence of Nb2O5 in ZnO Solar Cells

Valerio, Tatiana Lima; Maia, Guilherme Arielo Rodrigues; Viomar, Aline; Dias, Bianca Vanjura; Rodrigues, Paulo Rogério Pinto

doi:10.17807/orbital.v10i3.1106

Cited by 5 publications

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“…During the analysis period, the device did not present current density decay, indicating no tendency to degradation and consequently the diffusion processes of the recombination reaction are minimized. 15 Figure 5 shows the open circuit potential curves (Voc) for solar cells in the dark and presence of light. It can be seen in Figure 4 that the system ZnO+P3HT/ P3OT presented a high on/off ratio and fast switching because when light struck the cell, the increase in current was instantaneous, and when the lamp was interrupted, the current for both systems was close to zero 5 .…”

Section: Resultsmentioning

confidence: 99%

Application of Zinc Oxide in Hybrid Solar Cells Using a P3HT and P3OT Polymer Junction as Charge Carrier

et al. 2019

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Hybrid solar cells show an increasing number in researches due to its low cost and easy of production. They are composed by and organic material and a semiconductor oxide. The aim of this paper was to synthesis and characterize zinc oxide by coprecipitation and apply it in a hybrid solar cell that uses a P3HT/P3OT copolymer as charge carrier. The cell was assembled in "sandwich" form using FTO/ ZnO/P3HT-P3OT as work electrode, (Pt/FTO) as conter electrode and I/I-3 redox couple as electrolyte. Through the X-ray diffractogram the formation of a single ZnO wutzite hexagonal phase was observed. The morphology obtained for the oxide was spherical. The results of photochronoamperometry showed current density values of jP3HT/P3OT =0.55 mA.cm-2 for the cell in the presence of the copolymer and the curve jxV showed an efficiency of 0.16% for the studied cell, demonstrating that the polymer was a satisfactory sensitizer.

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Section: Resultsmentioning

confidence: 99%

Application of Zinc Oxide in Hybrid Solar Cells Using a P3HT and P3OT Polymer Junction as Charge Carrier

et al. 2019

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“…Only small current decays were observed, which are related to the diffusion processes at the interface of the device. According to Valério et al 28 and Essner, 29 the rate of reduction of the triiodide ions at the cathode does not follow the oxidation rate of the iodide ions at the anode, so some polymer molecules remain in the oxidized state until a triiodide molecule can reach the oxide to reduce it. At the moment the reduced species of the electrolyte arrives at the surface of the anode is immediately oxidized without being able to penetrate the porous oxide, so the polymer molecules that are in the deeper layers of the oxide remain oxidized and the drop in current can be observed, however, after a few seconds, J sc stabilized.…”

Section: Figures 4 and 5 Shows The X-ray Diffractograms Of Tio 2 And mentioning

confidence: 99%

COMPARATIVE STUDY OF TiO2 AND ZnO APPLICATION IN HYBRID SOLAR CELLS USING COPOLYMER P3OT/P3MT

Larsson

Tractz

Maia

et al. 2019

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Hybrid inorganic-organic solar cells are an attractive alternative energy source because of their low-cost production and ability to make use of a large amount of solar radiation available. This work aims to evaluate different solar cells composed of TiO 2 and ZnO with P3OT/P3MT copolymer. Layers of semiconductor oxides were deposited on transparent fluorine-doped tin oxide (FTO) by spin coating and adsorption in the polymer solution. X-ray diffraction (XRD), scanning electron microscopy (SEM), were used to characterize the fabricated semiconductors and curves of current density vs. potential (j-V), photochronoamperometry (j-t) and electrochemical impedance spectroscopy (EIS) were used to determine their electrical characteristics. The XRD analyses confirmed the crystalline nature of the oxide materials. SEM micrographs showed the spherical morphology of ZnO and the poorly defined agglomerate morphology of TiO 2. The electrochemical measurements proved that the best cell was produced with P3OT/P3MT copolymer and TiO 2 , owing to its lower charge transfer resistance, with the following photovoltaic parameters: V oc = 0.615 V ± 0.004, j sc = 1.545 mA cm-2 ± 0.240, FF = 0.637 ± 0.003, and η = 0.617% ± 0.117.

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“…aplicados em junção com os mais diversos corantes, tanto comerciais quanto naturais. Sendo que o TiO2 é o mais utilizado como eletrodo de trabalho(VALERIO et al, 2018) Feitosa et al (2018). destacam o uso de filmes finos de óxido de titânio (TiO2) nanocristalino e nanoporoso que apresentam propriedades fotovoltaicas e foram usados com sucesso em células solares com alta área superficial e incorporação de corantes e por esse motivo, tem sido estudado como uma rota alternativa para melhorar os dispositivos fotovoltaicos.O corante sensibilizador mais empregado é um complexo polipiridínico contendo rutênio (Ru) tendo por características uma grande absorção em praticamente todo o espectro eletromagnético na região do visível e alta eficiência na transferência de carga devido ao forte acoplamento químico ao TiO2(DIAS et al, 2016).…”

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Desenvolvimento de um sistema de monitoramento do consumo de energia elétrica: uma ferramenta para o uso eficiente de energia no setor residencial

Serafim,

Varella,

Santos

2023

Engenharia, Gestão E Inovação - Volume 11

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Study of the influence of Nb2O5 in ZnO Solar Cells

Cited by 5 publications

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Application of Zinc Oxide in Hybrid Solar Cells Using a P3HT and P3OT Polymer Junction as Charge Carrier

Application of Zinc Oxide in Hybrid Solar Cells Using a P3HT and P3OT Polymer Junction as Charge Carrier

COMPARATIVE STUDY OF TiO2 AND ZnO APPLICATION IN HYBRID SOLAR CELLS USING COPOLYMER P3OT/P3MT

Desenvolvimento de um sistema de monitoramento do consumo de energia elétrica: uma ferramenta para o uso eficiente de energia no setor residencial

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