Flexible thermopower generation over broad temperature range by PANI/nanorod hybrid-based p–n couples

Wang, Yao; Liu, Guifen; Sheng, Ming; Yu, Chao; Deng, Yuan

doi:10.1039/c8ta11008e

Cited by 34 publications

(36 citation statements)

References 30 publications

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“…Under thermal activation mechanism, the one-band model means that S monotonically increases with increasing T, and the two-band model means that S nonmonotonically changes with increasing T, and, at very high T, S has ambipolar behavior. In the experiment, the monotonic temperature dependence of S had been found for PF 6  -doped polypyrrole and iodine-doped polyacetylene 37 and the ambipolar behavior have been measured in (BEDT-TTF) 2 BrI 2 16 , TTF[Ni(dmit) 2 ] 2 38 , and PANI/Bi 2 S 3 39 . From our theoretical studies here, we can attribute these behaviors to be one-band model and two-band model, respectively.…”

Section: Discussionmentioning

confidence: 92%

Understanding the Temperature Dependence of the Seebeck Coefficient from First-Principles Band Structure Calculations for Organic Thermoelectric Materials

Liu

Wang

et al. 2021

CCS Chem

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The Seebeck effect measures the electric potential built up in materials under a temperature gradient. For organic thermoelectric materials, Seebeck coefficient shows more complicated temperature dependence than conventional systems, with both monotonic increase and nonmonotonic behavior, that is, first increase and then decrease. The mechanism behind the phenomenon is intriguing. Through the first-principles calculation coupled with Boltzmann transport equation, we demonstrate here some typical trends of Seebeck coefficient with temperature through analyzing band structures. The bandgap and bandwidths of valence band and conduction band jointly determine the effectiveness of thermal activation. Ineffective or effective thermal activation leads to a one-band or a two-band transport behavior, respectively.Under the thermal-activation mechanism, Seebeck coefficient shows monotonic temperature dependence in a one-band model but non-monotonic relationship in a two-band model. In particular, in the two-band model, Seebeck coefficient might show an ambipolar behavior, that is, its sign changes at high temperature.

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Section: Discussionmentioning

confidence: 92%

Understanding the Temperature Dependence of the Seebeck Coefficient from First-Principles Band Structure Calculations for Organic Thermoelectric Materials

Liu

Wang

et al. 2021

CCS Chem

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“…However, unlike the conventional materials, the polymer-based ones due to their structure, can benefit from application of the Soret effect. To our opinion, this effect is currently underrated and [97] PANI NiO Wide band gap 331 1.2 34 Sarkar et al [98] PANI Zr-MOF Soret effect, stretching, hybrid filler −17 780 2.1 0.46 664 Lin et al [99] SPAN −50 000 1 × 10 −6 Penteado et al [100] PANI DBSA, NaSIPA 40 1 0.25 0.0001 Horta-Romarís et al [101] PEDOT Stretching 16 5 Jia et al [102] www.afm-journal.de www.advancedsciencenews.com…”

Section: Discussionmentioning

confidence: 99%

“…Another element, which is known to highly contribute to TE performance is Bismuth (Bi) and Bi‐based materials. In the work by Wang et al [ 97 ] the use of Bi 2 S 3 nanorods to fabricate n‐type composites with elevated TE performance was reported. PANI, doped with CSA, was used as matrix with addition of various concentration of Bi 2 S 3 nanorods.…”

Section: Panimentioning

confidence: 99%

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Polymer‐Based Low‐Temperature Thermoelectric Composites

Yusupov

Vomiero

2020

Adv Funct Materials

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Thermoelectric materials allow direct conversion of waste heat energy into electrical energy, thus contributing to solving energy related issues. Polymerbased materials have been considered for use in heat conversion in the temperature range from 20 to 200 °C, within which conventional materials are not efficient enough, whereas polymers due to their good electronic transport properties, easy processability, non-toxicity, flexibility, abundance, and simplicity of adjustment, are considered as promising materials. Due to the large variety of available polymers and the almost unlimited combinations of possible modifications, the field of polymer-based thermoelectrics is very rapidly developing, already reaching efficiency values close to those of inorganic systems. In the current progress report, the most recent advances in the field are discussed. New approaches to improve thermoelectric performance are described, with a focus on revising the mechanisms to improve the thermoelectric properties of the three most investigated polymer matrixes: poly(3,4-ethylenedioxythiophene) polystyrene sulfonat, poly(3hexylthiophene-2,5-diyl), and polyaniline, alongside the three main paths of optimizing properties: incorporation of carbon-based material and inorganic substances, and treatment with chemical agents. The most promising research in the field is highlighted and thoroughly analyzed. The path toward a lab-to-fab transition for thermoelectric polymers is suggested in perspective.

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“…Actually, thermoelectric (TE) devices contribute as an important family of energy conversion techniques and developing flexible TE devices holds great promise for tactile sensing in e-skin applications. [25][26][27][28][29] However, most reported thin-film TE devices employ in-plane design to build sufficient temperature difference to generate thermopower, [30][31][32][33][34] disagreeing with the thermal gradient orientation of human body, thus renders great challenge to develop flexible TE module with matched thermal impedance for e-skin applications. [35][36][37] Another drawback for the parallel TE device is the long response time due to the long and thin TE leg as heat and current diffusing route.…”

Section: Flexible 3d Architectured Piezo/thermoelectric Bimodal Tactimentioning

confidence: 99%

Flexible 3D Architectured Piezo/Thermoelectric Bimodal Tactile Sensor Array for E‐Skin Application

Zhu

Wang

Mao

et al. 2020

Advanced Energy Materials

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124

121

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Flexible thermopower generation over broad temperature range by PANI/nanorod hybrid-based p–n couples

Abstract: N-type PANI/Bi2S3 nanorod hybrid films were developed to assemble a flexible power generator with high output voltage over a wide temperature range.

Cited by 34 publications

References 30 publications

Understanding the Temperature Dependence of the Seebeck Coefficient from First-Principles Band Structure Calculations for Organic Thermoelectric Materials

Understanding the Temperature Dependence of the Seebeck Coefficient from First-Principles Band Structure Calculations for Organic Thermoelectric Materials

Polymer‐Based Low‐Temperature Thermoelectric Composites

Flexible 3D Architectured Piezo/Thermoelectric Bimodal Tactile Sensor Array for E‐Skin Application

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