Preparation and characterization of core-shell electrodes for application in gel electrolyte-based dye-sensitized solar cells

Avellaneda, César O.; Gonçalves, Agnaldo de Souza; Benedetti, João E.; Nogueira, Ana F.

doi:10.1016/j.electacta.2009.05.024

Cited by 30 publications

(19 citation statements)

References 31 publications

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“…The photocurrent density (J sc ), open-circuit voltage (V oc ), fill factor (FF) and the corresponding energy conversion efficiency (Á) values, are summarized in Table 2. The series resistance of the system (R s ) and the fitting constants (m 1 and m 2 ) values obtained after fitting the curves using a two diode model are also included [34,36,57]. The J-V curves do not fit using a one diode model because of a high rate of charge recombi- nation in devices using polymeric or gel electrolyte.…”

Section: Dssc Characterizationmentioning

confidence: 99%

A polymer gel electrolyte composed of a poly(ethylene oxide) copolymer and the influence of its composition on the dynamics and performance of dye-sensitized solar cells

Benedetti

Gonçalves

Formiga

et al. 2010

Journal of Power Sources

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a b s t r a c tA polymer gel electrolyte composed of a poly(ethylene oxide) derivative, poly(ethylene oxide-co-2-(2-methoxyethoxy) ethyl glycidyl ether), mixed with gamma-butyrolactone (GBL), LiI and I 2 is employed in dye sensitized solar cells (DSSC). The electrolyte is characterized by conductivity experiments, Raman spectroscopy and thermal analysis. The influence of the electrolyte composition on the kinetics of DSSC is also investigated by transient absorption spectroscopy (TAS). The electrolyte containing 70 wt.% of GBL and 20 wt.% of LiI presents the highest conductivity (1.9 × 10 −3 S cm −1 ). An efficiency of 4.4% is achieved using this composition. The increase in I SC as a function of GBL can be attributed an increase in the mobility of the iodide (polyiodide) species. The increase in the yield of the intermediate species, I 2 − , originating in the regeneration reaction, is confirmed by TAS. However, the charge recombination process is faster at this composition and a decrease in the V oc is observed. Photovoltage decay experiments confirm an acceleration in charge recombination for the DSSC assembled with the electrolyte containing more GBL. Raman investigations show that in this electrolyte the I 5 − /I 3 − ratio is higher. Theoretical calculations also indicate that the I 5 − species is a better electron acceptor.

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Section: Dssc Characterizationmentioning

confidence: 99%

A polymer gel electrolyte composed of a poly(ethylene oxide) copolymer and the influence of its composition on the dynamics and performance of dye-sensitized solar cells

Benedetti

Gonçalves

Formiga

et al. 2010

Journal of Power Sources

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“…This likely stems from the substantial complexities associated with metal oxide semiconductors about the most straightforward understanding of the molecular behavior. Some of the attempts have already been made to solve the mentioned problems by developing novel oriented structures, such as 1D, 3D, and core–shell nanostructures …”

Section: Introductionmentioning

confidence: 99%

Highly Functional TNTs with Superb Photocatalytic, Optical, and Electronic Performance Achieving Record PV Efficiency of 10.1% for 1D‐Based DSSCs

Qadir

Sahito

et al. 2016

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Different nanostructures of TiO2 play an important role in the photocatalytic and photoelectronic applications. TiO2 nanotubes (TNTs) have received increasing attention for these applications due to their unique physicochemical properties. Focusing on highly functional TNTs (HF-TNTs) for photocatalytic and photoelectronic applications, this study describes the facile hydrothermal synthesis of HF-TNTs by using commercial and cheaper materials for cost-effective manufacturing. To prove the functionality and applicability, these TNTs are used as scattering structure in dye-sensitized solar cells (DSSCs). Photocatalytic, optical, Brunauer-Emmett-Teller (BET), electrochemical impedance spectrum, incident-photon-to-current efficiency, and intensity-modulated photocurrent spectroscopy/intensity-modulated photovoltage spectroscopy characterizations are proving the functionality of HF-TNTs for DSSCs. HF-TNTs show 50% higher photocatalytic degradation rate and also 68% higher dye loading ability than conventional TNTs (C-TNTs). The DSSCs having HF-TNT and its composite-based multifunctional overlayer show effective light absorption, outstanding light scattering, lower interfacial resistance, longer electron lifetime, rapid electron transfer, and improved diffusion length, and consequently, J SC , quantum efficiency, and record photoconversion efficiency of 10.1% using commercial N-719 dye is achieved, for 1D-based DSSCs. These new and highly functional TNTs will be a concrete fundamental background toward the development of more functional applications in fuel cells, dye-sensitized solar cells, Li-ion batteries, photocatalysis process, ion-exchange/adsorption process, and photoelectrochemical devices.

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“…To improve the electron collection efficiency, many attempts have been made to solve the mentioned problems by developing novel structures, such as 1‐D nanostructure (nanotube, nanofiber, nanowire, and nanorod), 3‐D nanostructure, and core‐shell nanostructure . The 1‐D nanostructure, which has the advantages of high light‐scattering effect and fast electron transport, is expected to enhance the performance of DSSCs effectively.…”

Section: Introductionmentioning

confidence: 99%

“…10 To improve the electron collection efficiency, many attempts have been made to solve the mentioned problems by developing novel structures, such as 1-D nanostructure (nanotube, nanofiber, nanowire, and nanorod), [11][12][13][14] 3-D nanostructure, 15 and core-shell nanostructure. 16 The 1-D nanostructure, which has the advantages of high light-scattering effect and fast electron transport, [17][18][19] is expected to enhance the performance of DSSCs effectively. TiO 2 nanotubes, which have the advantages of high aspect ratio, simple preparation procedure, and controllable morphology, have become the research focus of the 1-D nanostructure.…”

Section: Introductionmentioning

confidence: 99%

Double‐Layer Structure Photoanode with TiO₂ Nanotubes and Nanoparticles for Dye‐Sensitized Solar Cells

Cao

et al. 2012

J. Am. Ceram. Soc.

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Here, we report a novel double‐layer structure photoanode with TiO2 nanotube (TNT) layer and TiO2 nanoparticle (TP) layer via a two‐step method of electrochemical anodization and screen printing for dye‐sensitized solar cells (DSSCs). The results indicate that DSSCs with this double‐layer structure have significant advantages of large surface area, long electron lifetime, superior electron recombination restraint characteristics, and high light scattering. The layer thickness of nanotubes and nanoparticles is also investigated and finally an optimized double‐layer structure with excellent performance is prepared. With such a double‐layer structure photoanode, DSSC with a relative high conversion efficiency of 6.43% and a short‐circuit photocurrent density of 16.40 mA·cm−2 is obtained.

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Preparation and characterization of core-shell electrodes for application in gel electrolyte-based dye-sensitized solar cells

Cited by 30 publications

References 31 publications

A polymer gel electrolyte composed of a poly(ethylene oxide) copolymer and the influence of its composition on the dynamics and performance of dye-sensitized solar cells

A polymer gel electrolyte composed of a poly(ethylene oxide) copolymer and the influence of its composition on the dynamics and performance of dye-sensitized solar cells

Highly Functional TNTs with Superb Photocatalytic, Optical, and Electronic Performance Achieving Record PV Efficiency of 10.1% for 1D‐Based DSSCs

Double‐Layer Structure Photoanode with TiO₂ Nanotubes and Nanoparticles for Dye‐Sensitized Solar Cells

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Preparation and characterization of core-shell electrodes for application in gel electrolyte-based dye-sensitized solar cells

Cited by 30 publications

References 31 publications

A polymer gel electrolyte composed of a poly(ethylene oxide) copolymer and the influence of its composition on the dynamics and performance of dye-sensitized solar cells

A polymer gel electrolyte composed of a poly(ethylene oxide) copolymer and the influence of its composition on the dynamics and performance of dye-sensitized solar cells

Highly Functional TNTs with Superb Photocatalytic, Optical, and Electronic Performance Achieving Record PV Efficiency of 10.1% for 1D‐Based DSSCs

Double‐Layer Structure Photoanode with TiO2 Nanotubes and Nanoparticles for Dye‐Sensitized Solar Cells

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Product

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Double‐Layer Structure Photoanode with TiO₂ Nanotubes and Nanoparticles for Dye‐Sensitized Solar Cells