Enhanced Thermoelectric Properties of Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) by Binary Secondary Dopants

Yi, Chao; Wilhite, Abigail; Zhang, Long; Hu, Rundong; Chuang, Steven S. C.; Zheng, Jie; Gong, Xiong

doi:10.1021/acsami.5b01960

Cited by 95 publications

(62 citation statements)

References 30 publications

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“…[40,43] While at high doping level, more bipolarons are formed, resulting in more delocalized electrons in the main chain, consequently deceased binding energy. [15,42] For TFSI − doped 2D PTB7-DT, the binding energies of S(2p 3/2 ) decrease directly from 161.9 eV to 161.7 eV as the doping levels increase from 14 to 40%. One possible reason is that TFSI − not only interacted with the thiophene rings in the main chains of 2D PTB7-DT, but also interacted with the thiophene rings in the side chains, [43] resulting in the formation of bipolaron even at the low dopant concentration.…”

Section: Resultsmentioning

confidence: 99%

Enhanced thermoelectric properties of two-dimensional conjugated polymers

Meng

Liu

et al. 2018

emergent mater.

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Organic thermoelectric materials have drawn great attention in the past years. In this study, we report the thermoelectric properties of ferric salt bis(trifluoromethane)sulfonimide (TFSI − ) doped two-dimensional (2D) conjugated polymer, poly [[4,8-bis[(5-ethylhexyl)It is found that the electrical conductivities of TFSI − doped 2D PTB7-DT are nearly 100 times larger than those of PTB7, which would facilitate the inter-chain and the intra-chain charge carrier transport, resulting in enhanced electrical conductivities. All these results demonstrate that 2D conjugated polymers are promising candidate materials for approaching high performance organic thermoelectric electronics.

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Section: Resultsmentioning

confidence: 99%

Enhanced thermoelectric properties of two-dimensional conjugated polymers

Meng

Liu

et al. 2018

emergent mater.

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“…c) Significant increase of power factor ( S 2 σ) (highlighted by the red dashed line) in the DMSO–PEO binary secondary‐dopant‐treated PEDOT:PSS. b,c) Reproduced with permission . Copyright 2015, American Chemical Society.…”

Section: Strategies To Optimize the Properties Of Conductive Polymersmentioning

confidence: 99%

“…This strategy can generate semimetal electronic structures to induce high S and µ . For example, in DMSO–poly(ethylene oxide) (PEO)‐treated PEDOT:PSS, DMSO can induce structural ordering in the microstructure of PEDOT:PSS. Adding PEO can activate a larger ratio of PEDOT into bipolaron status through tuning the molecule ratios between the PEDOT and the PSS .…”

Section: Strategies To Optimize the Properties Of Conductive Polymersmentioning

confidence: 99%

Flexible Thermoelectric Materials and Generators: Challenges and Innovations

et al. 2019

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The urgent need for ecofriendly, stable, long‐lifetime power sources is driving the booming market for miniaturized and integrated electronics, including wearable and medical implantable devices. Flexible thermoelectric materials and devices are receiving increasing attention, due to their capability to convert heat into electricity directly by conformably attaching them onto heat sources. Polymer‐based flexible thermoelectric materials are particularly fascinating because of their intrinsic flexibility, affordability, and low toxicity. There are other promising alternatives including inorganic‐based flexible thermoelectrics that have high energy‐conversion efficiency, large power output, and stability at relatively high temperature. Herein, the state‐of‐the‐art in the development of flexible thermoelectric materials and devices is summarized, including exploring the fundamentals behind the performance of flexible thermoelectric materials and devices by relating materials chemistry and physics to properties. By taking insights from carrier and phonon transport, the limitations of high‐performance flexible thermoelectric materials and the underlying mechanisms associated with each optimization strategy are highlighted. Finally, the remaining challenges in flexible thermoelectric materials are discussed in conclusion, and suggestions and a framework to guide future development are provided, which may pave the way for a bright future for flexible thermoelectric devices in the energy market.

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“…For example, DMSO can enhance the electrical conductivity by up to three orders of magnitude while it has negligible effect on the Seebeck coefficient . Gong et al found that the addition of both PEO and DMSO can enhance not only the electrical conductivity but also the Seebeck coefficient . They thus observed an optimal PF of 157.4 µW m −1 K −2 with the electrical conductivity of 1300 S cm −1 and Seebeck coefficient of 40 µV K −1 .…”

Section: P‐type Te Polymersmentioning

confidence: 99%

“…The TE performance of PEDOT:PSS can be enhanced by adding a chemical compound such as dimethyl sulfoxide (DMSO), ethylene glycol (EG), or poly(ethylene oxide) (PEO) into its aqueous solution . For example, DMSO can enhance the electrical conductivity by up to three orders of magnitude while it has negligible effect on the Seebeck coefficient .…”

Section: P‐type Te Polymersmentioning

confidence: 99%

Recent Development of Thermoelectric Polymers and Composites

Yao

Fan

Cheng

et al. 2018

Macromol. Rapid Commun.

235

156

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Thermoelectric materials can be used as the active materials in thermoelectric generators and as Peltier coolers for direct energy conversion between heat and electricity. Apart from inorganic thermoelectric materials, thermoelectric polymers have been receiving great attention due to their unique advantages including low cost, high mechanical flexibility, light weight, low or no toxicity, and intrinsically low thermal conductivity. The power factor of thermoelectric polymers has been continuously rising, and the highest ZT value is more than 0.25 at room temperature. The power factor can be further improved by forming composites with nanomaterials. This article provides a review of recent developments on thermoelectric polymers and polymer composites. It focuses on the relationship between thermoelectric properties and the materials structure, including chemical structure, microstructure, dopants, and doping levels. Their thermoelectric properties can be further improved to be comparable to inorganic counterparts in the near future.

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Enhanced Thermoelectric Properties of Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) by Binary Secondary Dopants

Abstract: PSS thin films.

Cited by 95 publications

References 30 publications

Enhanced thermoelectric properties of two-dimensional conjugated polymers

Enhanced thermoelectric properties of two-dimensional conjugated polymers

Flexible Thermoelectric Materials and Generators: Challenges and Innovations

Recent Development of Thermoelectric Polymers and Composites

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