MoS2 nano-flower incorporation for improving organic-organic solid state electrochromic device performance

Kandpal, Suchita; Ghosh, Tanushree; Rani, Chanchal; Rani, Suman; Pathak, Devesh K.; Tanwar, Manushree; Bhatia, Ravi; Sameera, I.; Kumar, Rajesh

doi:10.1016/j.solmat.2021.111502

Cited by 43 publications

(46 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(a) SEM micrographs of MoS 2 nano-flakes and (b) magnified view showing the nano-petal-type morphology, (c) room-temperature PL spectrum recorded using 532 nm laser excitation, and (d) XRD pattern of MoS 2 nano-flakes. Reprinted in part with permission from Solar Energy Materials and Solar Cells 2021, 236, 111502 . Copyright 2022 Elsevier.…”

Section: Resultsmentioning

confidence: 99%

“…Light–matter interaction in transition metal chalcogenides like MoS 2 , MoSe 2 ,WS 2 , and WSe 2 has been widely explored to make next-generation photonics and optical devices by exploring their unique electronic, − optical, and spin-valleytronic and electrical properties. Among these, MoS 2 has gained tremendous attention due to its application in light detection, light emission, solar energy storage, field-effect transistors (FETs), , and so forth.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fano-Type Wavelength-Dependent Asymmetric Raman Line Shapes from MoS₂ Nanoflakes

et al. 2022

Self Cite

View full text Add to dashboard Cite

Excitation wavelength-dependent Raman spectroscopy has been carried out to study electron–phonon interaction (Fano resonance) in multi-layered bulk 2H–MoS2 nano-flakes. The electron–phonon coupling is proposed to be caused due to interaction between energy of an excitonic quasi-electronic continuum and the discrete one phonon, first-order Raman modes of MoS2. It is proposed that an asymmetrically broadened Raman line shape obtained by 633 nm laser excitation is due to electron–phonon interaction whose electronic continuum is provided by the well-known A and B excitons. Typical wavelength-dependent Raman line shape has been observed, which validates and quantifies the Fano interaction present in the samples. The experimentally obtained Raman scattering data show very good agreement with the theoretical Fano–Raman line-shape functions and help in estimating the coupling strength. Values of the electron–phonon interaction parameter obtained, through line-shape fitting, for the two excitation wavelengths have been compared and shown to have generic Fano-type dependence on the excitation wavelength.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fano-Type Wavelength-Dependent Asymmetric Raman Line Shapes from MoS₂ Nanoflakes

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…The MoS 2 nanoflowers and MWCNTs (conductivity = 6 S/cm) used in the device have been synthesized by a facile one-step hydrothermal route − and ferrocene–toluene pyrolysis, respectively, using the recipe discussed earlier. , In a typical synthesis of MoS 2 nanoflower, 1.7 g of ammonium heptamolybedate tetrahydrate [(NH 4 ) 6 Mo 7 O 24 ·4H 2 O] and 3 g of thiourea (CH 4 N 2 S) were dissolved in 60 mL deionized water by continuous stirring for 30 min. A homogeneous colorless solution was obtained, which was transferred into a 100 mL Teflon-lined stainless steel autoclave.…”

Section: Experimental Detailsmentioning

confidence: 99%

Bifunctional Application of Viologen-MoS₂-CNT/Polythiophene Device as Electrochromic Diode and Half-Wave Rectifier

et al. 2022

Self Cite

View full text Add to dashboard Cite

A dual purpose solid state electrochromic diode has been fabricated using polythiophene (P3HT) and ethyl Viologen (EV), predoped with multiwalled carbon nanotubes (MWCNTs) and MoS2. The device has been designed by considering two important aspects, first, the complementary redox activity of P3HT and EV and second, the electron holding properties of MoS2 and MWCNTs. The latter is found to enhance the electrochromic performance of the solid state device. On the other hand, the complementary redox nature gives the asymmetric diodic I–V characteristic to the device which has been exploited to use the electrochromic device for rectification application. The MoS2 nanoflower and MWCNTs are synthesized by one-step hydrothermal and pyrolysis techniques and well characterized by scanning electron microscopy (SEM), X-ray analysis (XRD), and Raman spectroscopy. Electrochromic properties of the device have been studied in detail to reveal an improvement in device performance in terms of faster speed and high coloration efficiency and color contrast. In situ bias-dependent Raman spectroscopy has been performed to understand the operation mechanism of the electrochromic diode which reveals (bi-)polaron formation as a result of dynamic doping eventually leading to color change. A half-wave rectifier has been realized from the electrochromic diode which rectifies an AC voltage of frequency 1 Hz or less making it suitable for low frequency operation. The study opens a new possibility to design and fabricate multipurpose frequency selective electrochromic rectifiers.

show abstract

“…[ 20,21 ] Multi‐step device fabrication, including high‐temperature treatment and vacuum processing for MOs and nontrivial synthesis for CPs, is another obstacle to their practical commercialization. [ 22–26 ] Therefore, EC ion conductor‐based systems can be an alternative owing to their structural simplicity, high optical contrast, and wide tunability of the amount of EC molecules participating in charging/discharging processes. [ 27,28 ] However, the device is driven by diffusion because all materials are mixed to form a single ion conductor, leading to relatively slow dynamics and un‐usable residual charges even after discharging.…”

Section: Introductionmentioning

confidence: 99%

Tailoring Diffusion Dynamics in Energy Storage Ionic Conductors for High‐Performance, Multi‐Function, Single‐Layer Electrochromic Supercapacitors

Kim

Jang

Kim

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

Electrochromic (EC) energy storage devices represent a cutting‐edge technology visually indicating stored energy status in real time through color change. Herein, extremely simple single‐layer electrochromic supercapacitors (SL‐ECSs) based on energy storage EC ion gels are proposed. The operation of SL‐ECSs follows Fick's law because of the diffusive nature of mass transport of all redox species. Therefore, the diffusion dynamics are tuned by tailoring fundamental parameters, the diffusion coefficient, and concentration gradient, and the availability of energy storage is maximized by reducing residual charges that cannot be extracted during the normal discharge process. In terms of the two critical metrics of ECSs, areal capacitance (Careal) and transmittance contrast between charged and discharged states (ΔT), the performance of SL‐ECSs (Careal ≈ 43.0 mF cm–2 and ΔT ≈ 96.8%) is favorably compared with previously reported ECSs. The capacitance retention remains at >80% even after continuous charge/discharge cyclic operations for 3000 min without specific encapsulation. Moreover, the practical multi‐functionality of the SL‐ECS is successfully demonstrated as a power source and applied force monitoring platform. It is expected that the SL‐ECS will be a simple but versatile component of high‐performance, ultra‐small functional electronics.

show abstract

MoS2 nano-flower incorporation for improving organic-organic solid state electrochromic device performance

Cited by 43 publications

References 55 publications

Fano-Type Wavelength-Dependent Asymmetric Raman Line Shapes from MoS₂ Nanoflakes

Fano-Type Wavelength-Dependent Asymmetric Raman Line Shapes from MoS₂ Nanoflakes

Bifunctional Application of Viologen-MoS₂-CNT/Polythiophene Device as Electrochromic Diode and Half-Wave Rectifier

Tailoring Diffusion Dynamics in Energy Storage Ionic Conductors for High‐Performance, Multi‐Function, Single‐Layer Electrochromic Supercapacitors

Contact Info

Product

Resources

About

MoS2 nano-flower incorporation for improving organic-organic solid state electrochromic device performance

Cited by 43 publications

References 55 publications

Fano-Type Wavelength-Dependent Asymmetric Raman Line Shapes from MoS2 Nanoflakes

Fano-Type Wavelength-Dependent Asymmetric Raman Line Shapes from MoS2 Nanoflakes

Bifunctional Application of Viologen-MoS2-CNT/Polythiophene Device as Electrochromic Diode and Half-Wave Rectifier

Tailoring Diffusion Dynamics in Energy Storage Ionic Conductors for High‐Performance, Multi‐Function, Single‐Layer Electrochromic Supercapacitors

Contact Info

Product

Resources

About

Fano-Type Wavelength-Dependent Asymmetric Raman Line Shapes from MoS₂ Nanoflakes

Fano-Type Wavelength-Dependent Asymmetric Raman Line Shapes from MoS₂ Nanoflakes

Bifunctional Application of Viologen-MoS₂-CNT/Polythiophene Device as Electrochromic Diode and Half-Wave Rectifier