Electrochemical impedance analysis of spray deposited CZTS thin film: Effect of Se introduction

Patil, Swati J.; Lokhande, Vaibhav C.; Lee, Dong-Weon; Lokhande, C.D.

doi:10.1016/j.optmat.2016.06.011

Cited by 42 publications

(9 citation statements)

References 32 publications

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“…Surface nanostructure has a substantial influence on intercalation kinetics with sulfur doping in CoWO 4 . Therefore, the particle size of the CoWO 4 material gradually decreased with sulfur doping, while the solid‐state diffusion distance shortened, and surface area increased [23] . In addition to this, to confirm the capacity contribution from the carbon cloth we have measured CV at identical conditions.…”

Section: Resultsmentioning

confidence: 81%

Bottom‐up Approach for Designing Cobalt Tungstate Nanospheres through Sulfur Amendment for High‐Performance Hybrid Supercapacitors

et al. 2021

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Nanofabrication of heteroatom‐doped metal oxides into a well‐defined architecture via a “bottom‐up” approach is crucial to overcome the boundaries of the metal oxides for energy storage systems. In the present work, this issue was addressed by developing sulfur‐doped bimetallic cobalt tungstate (CoWO4) porous nanospheres for efficient hybrid supercapacitors via a single‐step, ascendable bottom‐up approach. The combined experimental and kinetics studies revealed enhanced electrical conductivity, porosity, and openness for ion migration after amendments of the CoWO4 via sulfur doping. As a result, the sulfur‐doped CoWO4 nanospheres exhibited a specific capacity of 248.5 mA h g−1 with outstanding rate capability and cycling stability. The assembled hybrid supercapacitor cell with sulfur‐doped CoWO4 nanospheres and activated carbon electrodes could be driven reversibly in a voltage of 1.6 V and exhibited a specific capacitance of 177.25 F g−1 calculated at 1.33 A g−1 with a specific energy of 63.41 Wh kg−1 at 1000 W kg−1 specific power. In addition, the hybrid supercapacitor delivered 94.85 % initial capacitance over 10000 charge‐discharge cycles. The excellent supercapacitive performance of sulfur‐doped CoWO4 nanospheres may be credited to the sulfur doping and bottom‐up fabrication of the electrode materials.

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Section: Resultsmentioning

confidence: 81%

Bottom‐up Approach for Designing Cobalt Tungstate Nanospheres through Sulfur Amendment for High‐Performance Hybrid Supercapacitors

et al. 2021

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“…The absorption coefficient ( α ) and band gap ( E g ) are estimated by [39,40,41]:α=4πkλ (αEn)m=K(En−Eg) where λ and E n represent the wavelength and photon energy of the incident light, respectively, and K is a constant independent of the incident light. The m is exponent depending on whether the material is transitioning directly or indirectly.…”

Section: Resultsmentioning

confidence: 99%

Thickness Dependence of Ferroelectric and Optical Properties in Pb(Zr0.53Ti0.47)O3 Thin Films

Chen

et al. 2019

Sensors

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As a promising functional material, ferroelectric Pb(ZrxTi1−x)O3 (PZT) are widely used in many optical and electronic devices. Remarkably, as the film thickness decreases, the materials’ properties deviate gradually from those of solid materials. In this work, multilayered PZT thin films with different thicknesses are fabricated by Sol-Gel technique. The thickness effect on its microstructure, ferroelectric, and optical properties has been studied. It is found that the surface quality and the crystalline structure vary with the film thickness. Moreover, the increasing film thickness results in a significant increase in remnant polarization, due to the interfacial layer effect. Meanwhile, the dielectric loss and tunability are strongly dependent on thickness. In terms of optical properties, the refractive index of PZT films increase with the increasing thickness, and the photorefractive effect are also influenced by the thickness, which could all be related to the film density and photovoltaic effect. Besides, the band gap decreases as the film thickness increases. This work is significant for the application of PZT thin film in optical and optoelectronic devices.

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“…Nyquist plots for SnS/SnS 2 thin films are shown in Figure a1–d1. R s is the ohmic series resistance of the electrode system which contributes to the electrical contact of the electrode–electrolyte and resistivity of the electrolyte solution . As shown in Table , R s values for SnS/SnS 2 thin film are in the range of 1–55 Ω and increase when the products are changing from SnS to SnS 2 .…”

Section: Results and Discussionmentioning

confidence: 99%

Facile Synthesis of SnS and SnS₂ Nanosheets for FTO/SnS/SnS₂/Pt Photocathode

Cao

Yao

et al. 2018

ACS Appl. Energy Mater.

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Two-dimensional (2D) materials have attracted great attention recently. SnS/SnS 2 with sheet-like morphologies are widely used in photoelectric devices because of their excellent electronic transportation properties. In our study, by changing the mole ratios of SnCl 2 and C 2 H 5 NS at reaction temperatures as high as 280−300 °C, SnS rectangular nanosheets are converted successfully to SnS 2 hexagonal nanosheets with a one-pot method. SEM, XRD, Raman, and XPS analyses were utilized to examine the physical properties of the final products. Diffuse reflection spectra and PL spectra determined the bandgaps of SnS/SnS 2 to be about 1.49 and 2.19 eV, respectively. The photoelectric characteristics of SnS/SnS 2 nanosheets were also studied. FTO/SnS/SnS 2 / Pt photocathode was fabricated to enhance the photocurrent densities. Photocurrent densities as high as 26.7 μA/cm 2 were achieved.

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Electrochemical impedance analysis of spray deposited CZTS thin film: Effect of Se introduction

Cited by 42 publications

References 32 publications

Bottom‐up Approach for Designing Cobalt Tungstate Nanospheres through Sulfur Amendment for High‐Performance Hybrid Supercapacitors

Bottom‐up Approach for Designing Cobalt Tungstate Nanospheres through Sulfur Amendment for High‐Performance Hybrid Supercapacitors

Thickness Dependence of Ferroelectric and Optical Properties in Pb(Zr0.53Ti0.47)O3 Thin Films

Facile Synthesis of SnS and SnS₂ Nanosheets for FTO/SnS/SnS₂/Pt Photocathode

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Electrochemical impedance analysis of spray deposited CZTS thin film: Effect of Se introduction

Cited by 42 publications

References 32 publications

Bottom‐up Approach for Designing Cobalt Tungstate Nanospheres through Sulfur Amendment for High‐Performance Hybrid Supercapacitors

Bottom‐up Approach for Designing Cobalt Tungstate Nanospheres through Sulfur Amendment for High‐Performance Hybrid Supercapacitors

Thickness Dependence of Ferroelectric and Optical Properties in Pb(Zr0.53Ti0.47)O3 Thin Films

Facile Synthesis of SnS and SnS2 Nanosheets for FTO/SnS/SnS2/Pt Photocathode

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Product

Resources

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Facile Synthesis of SnS and SnS₂ Nanosheets for FTO/SnS/SnS₂/Pt Photocathode