Enhanced photoelectrochemical performance of tungsten oxide film by bifunctional Au nanoparticles

Kong, Yueqi; Sun, Hongqi; Fan, Weiliu; Wang, Li; Zhao, Hongkai; Zhao, Xian; Yuan, Shuxia

doi:10.1039/c7ra01426k

Cited by 42 publications

(21 citation statements)

References 51 publications

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“…Figure a shows the XRD patterns of the triple-cation perovskite films, prepared using different antisolvents. Eliminating the peaks at 26.5, 33.7, 37.8, and 51.5 ° associated with the FTO substrates, all the diffraction peaks agree well with the formation of the tetragonal phase 3D perovskite layer. Although the perovskite thin films are washed with different antisolvents, all XRD peaks are obtained at the same peaks of 14.0, 20, 24.5, 28.5, 31.8, 40.5, 43.1, and 50.2 ° .…”

Section: Results and Discussionmentioning

confidence: 65%

Approach To Enhance the Stability and Efficiency of Triple-Cation Perovskite Solar Cells by Reactive Antisolvents

Mutlu

Yeşil

Kıymaz

et al. 2020

ACS Appl. Energy Mater.

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Controlling thin-film crystallization kinetics of perovskites is vital for the fabrication of highly efficient and stable perovskite solar cells (PSCs). Because of the low solubility of lead halogen derivatives in dimethylformamide solvent and poor film quality, addition of dimethylsulfoxide (DMSO) to the solution as a cosolvent has a great effect on the crystallization kinetics and morphology of perovskite thin films. However, Pb-DMSO and residual DMSO complexes that are difficult to be removed from the structure can lead to structural deformations and stability issues. Here, two different reagents such as benzyl chloride (BCl) and benzyl bromide (BBr) are applied as antisolvents to eliminate these problems utilizing the Kornblum oxidation reactions in the triple-cation perovskite thin films formed by the one-step coating method. Electrochemical impedance spectroscopy (EIS) analysis has been carried out to explain the charge transfer resistances and capacitive behaviors under illuminated conditions. EIS measurements show that washing with BBr antisolvent reduces the charge recombination in PSCs and leads to the best device performance with improved charge transport, yielding a 19.2% power conversion efficiency with a higher open circuit voltage (V oc ) of 1100 mV compared to washing with chlorobenzene (CB) and BCl. Resistances at the low-frequency region in Nyquist complex plots associated with charge recombination resistances were measured to be 1430, 564, and 3000 ohm, which are in good agreement with short circuit currents 23.3, 23.1, and 24.8 mA/cm 2 for devices fabricated with CB, BCl, and BBr, respectively. Removal of the residual DMSO and Pb-DMSO complexes via washing with BBr results in achieving more stable and highly efficient solar cells, which maintained 94% of the initial efficiency after 1 month.

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Section: Results and Discussionmentioning

confidence: 65%

Approach To Enhance the Stability and Efficiency of Triple-Cation Perovskite Solar Cells by Reactive Antisolvents

Mutlu

Yeşil

Kıymaz

et al. 2020

ACS Appl. Energy Mater.

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“…45 The preseeding in combination with an in situ hydrothermal approach has been followed for the construction of Au-modified WO 3 photoanodes and reported an improved photoelectrochemical performance. 46 The three-dimensional ZnIn 2 S 4 /WO 3 photocatalytic material has been synthesized by a simple hydrothermal approach and fabricated a photoanode for the sensitive detection of prostate-specific antigen. 47 On the other hand, a three-dimensional ordered WO 3 −Au nanocomposite has been constructed via the poly(methyl methacrylate) template removal and heat-treating process and exploited for the detection of diabetes by acetone monitoring.…”

Section: ■ Introductionmentioning

confidence: 99%

Pulse Electrodeposited Au–WO₃ Catalyst from a Water–Ionic Liquid Microemulsion for Photoaccelerated Methanol Electrooxidation

et al. 2020

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For improving the separation efficiency of photogenerated carriers and electrocatalytic activity, we have used visible light-responsive tungsten oxide (WO3) as a support for a plasmonic gold nanoparticle (Au NP) cocatalyst. It has been fabricated by a two-step optimized pulse electrodeposition method in aqueous and water-in-ionic liquid microemulsion media. By taking advantage of interfacial heterojunctions and the synergistic effect, the plasmonic Au NP electrocatalyst on WO3-coated fluorine-doped tin oxide as a photoanode has shown enhanced electrocatalytic current density as well as a negative shift in the onset potential under light irradiation for methanol electrooxidation. The pulse electrodeposited Au–WO3 nanocatalyst under light irradiation displays ∼3.85 times enhancement in electrocatalytic activity than without light irradiation, and it has been attributed to the simultaneous enhancement in electron–hole (e–/h+) pair separation of WO3 and Au NP surface plasmon resonance absorption. The mechanism of enhanced electrocatalytic performance of Au–WO3 has also been proposed under light illumination.

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“…Though a number of worthwhile single-semiconductor photocatalysts like Cu 2 O, , ZnO, WO 3 , − etc., have been studied exhaustively, they suffer from various drawbacks. Specifically, a small specific surface area, a long migration distance of the excited electron–hole pairs to reach the active sites, and a poor quantum yield due to a high rate of recombination prevent their performances from being improved .…”

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confidence: 99%

Energy-Dependent Z-Scheme via Metal-Interfacing Two-Dimensional p-Type and n-Type Semiconductor Layers for Efficient Optoelectronic Conversion

Eshete

Xie

et al. 2019

J. Phys. Chem. Lett.

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Hybrid heterostructures are a promising type of materials framework for optoelectronic conversion. We designed a ternary energy-dependent thin layer of Cu2S–Pt–WO3 (p-type–metal–n-type) heterojunction to explore an alternative way of realizing efficient charge separation. First-principles calculations showed that the Fermi level of the whole system is lined up via the mediation of Pt metal, which fosters the combination of holes in Cu2S and electrons in WO3 and keeps electrons in Cu2S and holes in WO3 well separated. Importantly, creation of band bending and charge polarization steer low-energy charges selectively to the intermediate metal and keep high-energy charges on individual semiconductors apart. Our simulation analysis of two-dimensional layers with the metal bridge shows increased charge flows across the junction compared to that of their bulk counterparts. Overall, this heterojunction is viable for suppressing recombination of photogenerated electron–hole pairs and augmented electrons per surface that would allow enhanced optoelectronic conversion.

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Enhanced photoelectrochemical performance of tungsten oxide film by bifunctional Au nanoparticles

Abstract: Proposed mechanism of the synergistic effect of SPR and inner electric field in the Au/WO3.

Cited by 42 publications

References 51 publications

Approach To Enhance the Stability and Efficiency of Triple-Cation Perovskite Solar Cells by Reactive Antisolvents

Approach To Enhance the Stability and Efficiency of Triple-Cation Perovskite Solar Cells by Reactive Antisolvents

Pulse Electrodeposited Au–WO₃ Catalyst from a Water–Ionic Liquid Microemulsion for Photoaccelerated Methanol Electrooxidation

Energy-Dependent Z-Scheme via Metal-Interfacing Two-Dimensional p-Type and n-Type Semiconductor Layers for Efficient Optoelectronic Conversion

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Enhanced photoelectrochemical performance of tungsten oxide film by bifunctional Au nanoparticles

Abstract: Proposed mechanism of the synergistic effect of SPR and inner electric field in the Au/WO3.

Cited by 42 publications

References 51 publications

Approach To Enhance the Stability and Efficiency of Triple-Cation Perovskite Solar Cells by Reactive Antisolvents

Approach To Enhance the Stability and Efficiency of Triple-Cation Perovskite Solar Cells by Reactive Antisolvents

Pulse Electrodeposited Au–WO3 Catalyst from a Water–Ionic Liquid Microemulsion for Photoaccelerated Methanol Electrooxidation

Energy-Dependent Z-Scheme via Metal-Interfacing Two-Dimensional p-Type and n-Type Semiconductor Layers for Efficient Optoelectronic Conversion

Contact Info

Product

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Pulse Electrodeposited Au–WO₃ Catalyst from a Water–Ionic Liquid Microemulsion for Photoaccelerated Methanol Electrooxidation