Effects of RF Magnetron Sputtering Deposition Power on Crystallinity and Thermoelectric Properties of Antimony Telluride and Bismuth Telluride Thin Films on Flexible Substrates

Amirghasemi, Farbod; Kassegne, Sam

doi:10.1007/s11664-020-08681-y

Cited by 12 publications

(6 citation statements)

References 31 publications

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“…For PVTC-based composite films, the diffraction peaks appeared at 17.9°, which corresponds to the α phase, and the diffraction peaks observed at 18.5° and 20.1° correspond to the γ phase, , as shown in Figure a. It can be seen that the diffraction peak intensity of PVTC in the SiO 2 -2h/PVTC/SiO 2 -1h/PVTC/SiO 2 -2h (S2PS1S2) and SiO 2 -2h/PVTC/BZT-1h/PVTC/SiO 2 -2h (S2PB1S2) films is inferior to that in the PVTC/SiO 2 -1h/PVTC (PS1P) and PVTC/BZT-1h/PVTC (PB1P) films, which indicates that the INL grown on the surface of PVTC film is good for improving the crystalline structure. , No diffraction peaks corresponding to an inorganic layer of SiO 2 or BZT can be observed, meaning that both SiO 2 and BZT are noncrystallized. Figure b shows the FTIR spectra, the characteristic peaks corresponding to α phase of PVTC are approximately 976 and 532 cm –1 ; the peaks at 812 and 776 cm –1 correspond to the γ phase of PVTC. , To further prove the successful preparation of the insulating layer on the surface of PVTC, the XPS energy spectrum was tested to study the elemental composition.…”

Section: Resultsmentioning

confidence: 89%

“…It can be seen that the diffraction peak intensity of PVTC in the SiO 2 -2h/PVTC/SiO 2 -1h/PVTC/SiO 2 -2h (S2PS1S2) and SiO 2 -2h/PVTC/BZT-1h/PVTC/SiO 2 -2h (S2PB1S2) films is inferior to that in the PVTC/SiO 2 -1h/PVTC (PS1P) and PVTC/BZT-1h/PVTC (PB1P) films, which indicates that the INL grown on the surface of PVTC film is good for improving the crystalline structure. 24,25 No diffraction peaks corresponding to an inorganic layer of SiO 2 or BZT can be observed, meaning that both SiO 2 and BZT are noncrystallized. Figure 2b shows the FTIR spectra, the characteristic peaks corresponding to α phase of PVTC are approximately 976 and 532 cm −1 ; the peaks at 812 and 776 cm −1 correspond to the γ phase of PVTC.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Improved Energy Storage Performance of P(VDF-TrFE-CFE) Multilayer Films by Utilizing Inorganic Functional Layers

Chen

Zhang

et al. 2021

ACS Appl. Energy Mater.

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Polymer dielectric films are the preferred materials for capacitive energy storage. However, both the discharged energy density and efficiency of ferroelectric polymers dielectrics reduced due to the ferroelectric loss and conduction loss, and so it is urgent to develop effective ways to improve the capability. In this study, inorganic functional layers (INLs), such as SiO 2 and BaZrTiO 3 (BZT), are grown by magnetron sputtering technology, which act as the interlayer or top/bottom layer in the P(VDF-TrFE-CFE) (PVTC) ferroelectric films. The effects of INL thickness and growth sequence on the microstructure and electrical properties have been systematically investigated. The results show that the SiO 2 INL is favorable to improve the breakdown field strength, where BZT INL is beneficial to enhance the polarization of the composite films. The optimized energy storage density of 12.32 J/cm 3 and an efficiency of 64.87% are obtained in the SiO 2 -2h/PVTC/BZT-1h/PVTC/SiO 2 -2h multilayer composite films. The INL forms an interfacial barrier layer at the electrode−dielectric interface, while the development of breakdown path can be inhibited at the dielectric−dielectric interface, thus reducing the leakage current and energy loss. The introduction of inorganic functional layers enables the polymer dielectric films to have an improved energy storage density and efficiency.

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Section: Resultsmentioning

confidence: 89%

Section: ■ Results and Discussionmentioning

confidence: 99%

Improved Energy Storage Performance of P(VDF-TrFE-CFE) Multilayer Films by Utilizing Inorganic Functional Layers

Chen

Zhang

et al. 2021

ACS Appl. Energy Mater.

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“…Taking into account that it has been reported that the increase in crystallinity increases the Seebeck coefficient, this crystallinity enhancement might also contribute to the Seebeck enhancement found in these samples. For instance, in Bi 2 Te 3 when the samples are annealed 24 or have a larger grain size, 25 the Seebeck coefficient can increase up to ten-fold. 24 In the second case, it cannot be ruled out the influence of the topological surface states, which are known to be detrimental to the Seebeck coefficient.…”

Section: Resultsmentioning

confidence: 99%

3D Bi₂Te₃ Interconnected Nanowire Networks to Increase Thermoelectric Efficiency

Ruiz‐Clavijo

Caballero-Calero

Manzano

et al. 2021

ACS Appl. Energy Mater.

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3D interconnected nanowire scaffoldings are shown to increase the thermoelectric efficiency in comparison to similar diameter 1D nanowires and films grown under similar electrodeposition conditions. Bi 2 Te 3 3D nanonetworks offer a reduction in thermal conductivity (κ T ) while preserving the high electrical conductivity of the films. The reduction in κ T is modeled using the hydrodynamic heat transport equation, and it can be understood as a heat viscosity effect due to the 3D nanostructuration. In addition, the Seebeck coefficient is twice that of nanowires and films, and up to 50% higher than in a single crystal. This increase is interpreted as a nonequilibrium effect that the geometry of the structure induces on the distribution function of the phonons, producing an enhanced phonon drag. These thermoelectric metamaterials have higher performance and are fabricated with large areas by a cost-effective method, which makes them suitable for up-scale production.

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“…Sputtering is a process that relies on the growth of ad-atoms, whereby the ejected material from the target replicates the textural features of the substrate surface. − Comparing the results, it is possible to observe that Cu thin films maintain their crystalline structure, even when deposited on highly porous structured substrates, such as knits. Nevertheless, the same is unclear for the Ti and TiCu 0.34 thin films.…”

Section: Resultsmentioning

confidence: 99%

EMI Shielding and Conductive Textiles Functionalized with (Ti,Cu) Nanomaterials for Biomedical Applications

Lopes,

Ferreira,

Correa

et al. 2023

ACS Appl. Mater. Interfaces

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This study explores the potential of integrating thinfilm technology in the design of new and effective electromagnetic interference (EMI) shielding and conductive materials for textiles and wearables. This application is of particular interest to the textile industry as it can bring new functionalities to wearables and protect humans from prolonged exposure to EM radiation. Three different thin films of pure Ti, pure Cu, and Ti-doped with Cu prepared by magnetron sputtering were used to functionalize textile knits based on cotton (code 39F) and lyocell fibers (62I). The films displayed different crystalline structures, morphologies, and topographies, which depended on their chemical compositions. The shielding effectiveness (SE) of the functionalized knits against EMI was evaluated in the frequency range of 2−8 GHz. Also, the electrical response under stress was assessed since the electrical conductivity is closely related to the EMI shielding effectiveness. The results demonstrate the feasibility of using a thin conductive layer based on Cu or Ti−Cu to improve the shield textiles with great adhesion and low thickness, providing an interesting path to improve shielding efficiency for EMI without modifying the flexibility of the textiles.

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Effects of RF Magnetron Sputtering Deposition Power on Crystallinity and Thermoelectric Properties of Antimony Telluride and Bismuth Telluride Thin Films on Flexible Substrates

Cited by 12 publications

References 31 publications

Improved Energy Storage Performance of P(VDF-TrFE-CFE) Multilayer Films by Utilizing Inorganic Functional Layers

Improved Energy Storage Performance of P(VDF-TrFE-CFE) Multilayer Films by Utilizing Inorganic Functional Layers

3D Bi₂Te₃ Interconnected Nanowire Networks to Increase Thermoelectric Efficiency

EMI Shielding and Conductive Textiles Functionalized with (Ti,Cu) Nanomaterials for Biomedical Applications

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Effects of RF Magnetron Sputtering Deposition Power on Crystallinity and Thermoelectric Properties of Antimony Telluride and Bismuth Telluride Thin Films on Flexible Substrates

Cited by 12 publications

References 31 publications

Improved Energy Storage Performance of P(VDF-TrFE-CFE) Multilayer Films by Utilizing Inorganic Functional Layers

Improved Energy Storage Performance of P(VDF-TrFE-CFE) Multilayer Films by Utilizing Inorganic Functional Layers

3D Bi2Te3 Interconnected Nanowire Networks to Increase Thermoelectric Efficiency

EMI Shielding and Conductive Textiles Functionalized with (Ti,Cu) Nanomaterials for Biomedical Applications

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Product

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3D Bi₂Te₃ Interconnected Nanowire Networks to Increase Thermoelectric Efficiency