Thermoelectric Power Factor for Polyaniline/Molybdenum Trioxide Composites

Anilkumar, Koppalkar R.; Parveen, Ameena; Badiger, G.R.; Prasad, M. V. N. Ambika

doi:10.1080/00150190902961801

Cited by 10 publications

(6 citation statements)

References 7 publications

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“…For the 35 wt % SWCNT composite (sample F3), ZT is calculated to be ∼0.02 at 300 K, with an estimated thermal conductivity of ∼0.4 W/(m·K). This ZT is at least 1 order of magnitude greater than those of the previous studies with polymer composites ,− and higher than typical values of bulk semiconductor materials such as silicon ( ZT ≈ 0.01).…”

Section: Resultscontrasting

confidence: 50%

Improved Thermoelectric Behavior of Nanotube-Filled Polymer Composites with Poly(3,4-ethylenedioxythiophene) Poly(styrenesulfonate)

et al. 2009

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The thermoelectric properties of carbon nanotube (CNT)-filled polymer composites can be enhanced by modifying junctions between CNTs using poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS), yielding high electrical conductivities (up to approximately 40000 S/m) without significantly altering thermopower (or Seebeck coefficient). This is because PEDOT:PSS particles are decorated on the surface of CNTs, electrically connecting junctions between CNTs. On the other hand, thermal transport remains comparable to typical polymeric materials due to the dissimilar bonding and vibrational spectra between CNT and PEDOT:PSS. This behavior is very different from that of typical semiconductors whose thermoelectric properties are strongly correlated. The decoupled thermoelectric properties, which is ideal for developing better thermoelectric materials, are believed to be due to thermally disconnected and electrically connected contact junctions between CNTs. Carrier transport at the junction is found to be strongly dependent on the type and concentration of stabilizers. The crucial role of stabilizers was revealed by characterizing transport characteristics of composites synthesized by electrically conducting PEDOT:PSS and insulating gum Arabic (GA) with 1:1-1:4 weight ratios of CNT to stabilizers. The influence of composite synthesis temperature and CNT-type and concentration on thermoelectric properties has also been studied. Single-walled (SW) CNT-filled composites dried at room temperature followed by 80 degrees C exhibited the best thermoelectric performance in this study. The highest thermoelectric figure of merit (ZT) in this study is estimated to be approximately 0.02 at room temperature, which is at least one order of magnitude higher than most polymers and higher than that of bulk Si. Further studies with various polymers and nanoparticles with high thermoelectric performance may result in economical, lightweight, and efficient polymer thermoelectric materials.

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Section: Resultscontrasting

confidence: 50%

Improved Thermoelectric Behavior of Nanotube-Filled Polymer Composites with Poly(3,4-ethylenedioxythiophene) Poly(styrenesulfonate)

et al. 2009

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“…34,35 Furthermore, studies have shown that MoO 3 may be a suitable component for composite thermoelectric devices. 36 Hybrid semiconductors based on MO 3 (M = Mo, W) are likely to have greatly enhanced properties and new functionality, as found in the II− VI hybrid structures. Here we report the design, synthesis, and unique properties of a hybrid semiconductor family MO 3 (L) (L = organic linker) composed of periodically ordered 1D and 2D perovskite-like modules of MO 3 (see Table 1).…”

Section: ■ Introductionmentioning

confidence: 99%

“…The binary MoO 3 and WO 3 have been extensively studied for possible applications in solar energy conversion. , For example, WO 3 has been well investigated for its use in photochemical water oxidation and dye-sensitized solar cells. Much effort is currently being made to tune its band gap and Fermi energy. − Interestingly both MoO 3 and WO 3 are also considered for applications in lithium ion battery anodes and electrochromic windows. , Furthermore, studies have shown that MoO 3 may be a suitable component for composite thermoelectric devices . Hybrid semiconductors based on MO 3 (M = Mo, W) are likely to have greatly enhanced properties and new functionality, as found in the II–VI hybrid structures.…”

Section: Introductionmentioning

confidence: 99%

From 1D Chain to 3D Network: A New Family of Inorganic–Organic Hybrid Semiconductors MO₃(L)_x (M = Mo, W; L = Organic Linker) Built on Perovskite-like Structure Modules

et al. 2013

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MO3 (M = Mo, W) or VI-VI binary compounds are important semiconducting oxides that show great promise for a variety of applications. In an effort to tune and enhance their properties in a systematic manner we have applied a designing strategy to deliberately introduce organic linker molecules in these perovskite-like crystal lattices. This approach has led to a wealth of new hybrid structures built on one-dimensional (1D) and two-dimensional (2D) VI-VI modules. The hybrid semiconductors exhibit a number of greatly improved properties and new functionality, including broad band gap tunability, negative thermal expansion, largely reduced thermal conductivity, and significantly enhanced dielectric constant compared to their MO3 parent phases.

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“…Fully organic, electrically conductive composites can provide a more environmentally friendly, lightweight alternative to traditional inorganic semiconductors. [6,[18][19][20][21][22][23] Polymer-based materials are of interest because of the intrinsically low thermal conductivity associated with the composite matrix ( 0.2 W m À1 K À1 ), which can lead to a high thermoelectric conversion efficiency, and the corresponding dimensionless figure of merit (ZT) is defined as:…”

Section: Introductionmentioning

confidence: 99%

“…[29] Utilizing this segregated-network approach, electrical conductivity values can be achieved in the degenerate-semiconductor or metallic regimes. [18,21,30] In typical monolithic inorganic semiconductors, increasing the electrical conductivity results in a decrease in the Seebeck coefficient. [4] To decouple these thermoelectric properties, water-based composites containing electrically connected (but thermally disconnected) junctions can be used to create small energy barriers for electron transport at the junctions, deterring low-energy electron transport.…”

Section: Introductionmentioning

confidence: 99%

Fully Organic Nanocomposites with High Thermoelectric Power Factors by using a Dual‐Stabilizer Preparation

et al. 2013

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The thermoelectric properties of fully organic nanocomposites were investigated, for which meso‐tetra(4‐carboxyphenyl) porphine (TCPP) and poly(3,4‐ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) were used as instrinically conductive and semiconducting stabilizers, respectively. The electrical conductivity (σ) of these dual‐stabilizer organic composites increased to approximately 9500 S m−1 as the concentrations of both the multiwalled carbon nanotubes (MWNTs) and PEDOT:PSS were increased. The thermopower (or Seebeck coefficient, S) and thermal conductivity, however, remained relatively unaffected by the increase in concentration (≈40 μV K−1 and ≈0.12 W m−1 K−1, respectively). Replacing MWNTs with double‐walled carbon nanotubes (DWNTs) increased σ and S to approximately 96 000 S m−1 and 70 μV K−1, respectively, at 40 wt % DWNTs. This study suggests that σ and S can be simultaneously tailored by using multiple stabilizing agents to affect the transport properties of the junctions between nanotubes. Combining semiconducting and intrinsically conductive molecules as CNT‐stabilizers has led to a power factor that is among the best for a completely organic, free‐standing film (≈500 μW m−1 K−2). These flexible, segregated‐network nanocomposites now exhibit properties that rival the more conventional inorganic semiconductors, particularly when normalized by the mass.

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Thermoelectric Power Factor for Polyaniline/Molybdenum Trioxide Composites

Cited by 10 publications

References 7 publications

Improved Thermoelectric Behavior of Nanotube-Filled Polymer Composites with Poly(3,4-ethylenedioxythiophene) Poly(styrenesulfonate)

Improved Thermoelectric Behavior of Nanotube-Filled Polymer Composites with Poly(3,4-ethylenedioxythiophene) Poly(styrenesulfonate)

From 1D Chain to 3D Network: A New Family of Inorganic–Organic Hybrid Semiconductors MO₃(L)_x (M = Mo, W; L = Organic Linker) Built on Perovskite-like Structure Modules

Fully Organic Nanocomposites with High Thermoelectric Power Factors by using a Dual‐Stabilizer Preparation

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Thermoelectric Power Factor for Polyaniline/Molybdenum Trioxide Composites

Cited by 10 publications

References 7 publications

Improved Thermoelectric Behavior of Nanotube-Filled Polymer Composites with Poly(3,4-ethylenedioxythiophene) Poly(styrenesulfonate)

Improved Thermoelectric Behavior of Nanotube-Filled Polymer Composites with Poly(3,4-ethylenedioxythiophene) Poly(styrenesulfonate)

From 1D Chain to 3D Network: A New Family of Inorganic–Organic Hybrid Semiconductors MO3(L)x (M = Mo, W; L = Organic Linker) Built on Perovskite-like Structure Modules

Fully Organic Nanocomposites with High Thermoelectric Power Factors by using a Dual‐Stabilizer Preparation

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From 1D Chain to 3D Network: A New Family of Inorganic–Organic Hybrid Semiconductors MO₃(L)_x (M = Mo, W; L = Organic Linker) Built on Perovskite-like Structure Modules