Exfoliated Sn–Se–Te based nanosheets and their flexible thermoelectric composites with poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) fabricated by solution processing

Ju, Heongkyu; Park, Dabin; Kim, Kwanwoo; Kim, Jooheon

doi:10.1016/j.orgel.2019.05.017

Cited by 20 publications

(12 citation statements)

References 30 publications

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“…Tin selenide‐based composites have also been studied for the application to organic TEs 40,41 . Ju and Kim 40 prepared tin selenide nanosheets using a Li + intercalation, subsequent exfoliation process from inorganic ingots, and they dispersed the synthesized nanosheets into the PEDOT:PSS solution.…”

Section: Carbon‐based Thermoelectrics (Tes)mentioning

confidence: 99%

“…A maximum power factor of ~386 μW·m −1 ·K −2 was achieved at 5% DMSO addition and an SnSe nanosheet content of 20 wt%. A tin–selenide–telluride alloy nanosheet (SnSe 0.97 Te 0.03 )‐based composite material was also used to improve the TE properties of PEDOT:PSS 41 . As the content of the nanosheet increased, electrical conductivity decreased and Seebeck coefficient increased.…”

Section: Carbon‐based Thermoelectrics (Tes)mentioning

confidence: 99%

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Advances in carbon‐based thermoelectric materials for high‐performance, flexible thermoelectric devices

Yun

Choi

2021

Carbon Energy

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Waste energy harvesting can contribute to the increase of the efficiency of many industrial processes, which consume energy to produce valuable products. Among all the wasted energy, heat energy is the most abundant, existing in almost any situation. Thermoelectric devices have the capability to harvest and convert the thermal energy into electrical power via the Seebeck effect. With its simple operating principle, thermoelectric devices can be reliable even under the harshest environments, taking advantage of any type of heat source. As a result, various inorganic and organic materials are being explored as thermoelectric materials. Among the reported materials, carbon‐based materials are promising in terms of commericialization, due to their nontoxic and abundant nature, and solution processability. In particular, poly(3,4‐ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS), carbon nanotubes, and graphene are extensively studied as thermoelectric materials owing to their remarkable thermoelectric performance. Also, organic–inorganic hybrid halide perovskites show the potential to be used as future high‐performance thermoelectric materials. Here, the progess in carbon materials as thermoelectrics is reviewed in detail, focusing on four base materials (PEDOT:PSS, carbon nanotubes, graphene, and organic–inorganic hybrid halide perovskites). This review illuminates the potential of carbon‐based materials in the field of thermoelectrics and their application to next‐generation energy devices.

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Section: Carbon‐based Thermoelectrics (Tes)mentioning

confidence: 99%

Section: Carbon‐based Thermoelectrics (Tes)mentioning

confidence: 99%

Advances in carbon‐based thermoelectric materials for high‐performance, flexible thermoelectric devices

Yun

Choi

2021

Carbon Energy

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“…Thus, polymer-based TE materials have recently been widely used for energy harvesting due to their unique advantages, i.e., low cost, low processing temperature, and mechanical flexibility. In this regard, we have developed high-efficiency metal polymer TE devices [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Effect of SrTiO3 Nanoparticles in Conductive Polymer on the Thermoelectric Performance for Efficient Thermoelectrics

Park

Kim

2020

Polymers

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We present hybrid organic inorganic materials, namely, SrTiO3/polyaniline (PANI) composites, with high thermoelectric performance; samples with various SrTiO3 contents (10, 20, 30, and 50 wt.%) were prepared. The PANI component was obtained through the polymerization of aniline monomers, followed by camphosulfonic acid-doping to enhance its electrical conductivity. SrTiO3, with a high Seebeck coefficient, was used as the N-type inorganic componenet; it was synthesized via a one-pot solvothermal methods and, then, dispersed into the conductive PANI matrix. The SrTiO3 content influenced the Seebeck coefficient and electrical conductivity of the resulting composites. The variations in the thermoelectric properties of the SrTiO3/PANI composites consequently changed their power factor; at room temperature, the highest value was ~49.6 μW·m/K2, which is 17 times larger than that of pure PANI.

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“…Some studies have utilized nanosheets instead of nanowires/nanorods. 149,229,230 In a study tin-selenium-telluride films were synthesized in a hydrothermal reaction and intercalated with lithium ions. After mixing with PEDOT:PSS a small PF (14 μW m -1 K −2 ) was observed owning a further post treatment wasn't employed to improve electrical conductivity.…”

Section: Ionic-liquid Treatment On Pedot:pss For Improved Pfmentioning

confidence: 99%

“…231 In a more recent paper, the same team managed to improve the PF to 130 μW m -1 K -2 using a similar Tin-selenium-telluride system with PEDOT:PSS reported preiviously. 230,231 The main difference between the two research methodologies was the stoichiometry of the inorganic ingot to be imbedded into PEDOT:PSS matrix. The Seebeck coefficient and electrical conductivity however remained coupled and expressed an inverse relationship to each other.…”

Section: Ionic-liquid Treatment On Pedot:pss For Improved Pfmentioning

confidence: 99%

Improvement to the thermoelectric properties of PEDOT:PSS

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Thermoelectric materials can convert waste heat to electricity without moving parts. Extensive research into improving the efficiency of inorganic thermoelectric materials has allowed some materials such as bismuth tellurides to be commercialized. These materials, however, contain materials in low abundance on earth such as tellurium therefore their use and scaled production would be limited. Organic and hybrid thermoelectric materials can meet the gap for niche markets as well as be synthesized on mass, due to utilization of earth abundant elements such as carbon, sulphur, and nitrogen. The thermoelectric generators require several n and p-type materials connected for optimal efficiency. There are many ways to create inorganic thermoelectric n and p-types. However, for the organic thermoelectric materials the efficiency lags because of their lower electrical conductivity and Seebeck coefficient as well as the lack of effective strategies in the development of n-type materials. Poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) is one of the most successful and researched p-type organic thermoelectric material and thus, the thesis will explore effective strategies for decoupling the apparent trade-offs observed when improving either the electrical conductivity or Seebeck coefficient. The first major contribution to knowledge discussed in this study is the utilization of a reducing agent treatment on PEDOT-ionic liquid composites (reader is advised to refer to chapter 5). Another significant finding was the successful development of a novel route to an n-type single walled carbon nanotube, PEDOT:PSS composite (please refer to chapter 6). The final and most significant contribution to knowledge in this research project was the development of a set of novel single walled carbon nanotube, ionic liquid, PEDOT:PSS composites whereby after a post treatment with a guanidinium iodide in ethylene glycol solution allowed for improvement of the electrical conductivity from 3.4 S cm -1 to 3665 S cm-1 and Seebeck coefficient from 12 μV K-1 to 27 μV K-1 thereby leading to an optimised power factor of 236 μW m-1 K-1 at 140 °C (please refer to chapter 7).

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Exfoliated Sn–Se–Te based nanosheets and their flexible thermoelectric composites with poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) fabricated by solution processing

Cited by 20 publications

References 30 publications

Advances in carbon‐based thermoelectric materials for high‐performance, flexible thermoelectric devices

Advances in carbon‐based thermoelectric materials for high‐performance, flexible thermoelectric devices

Effect of SrTiO3 Nanoparticles in Conductive Polymer on the Thermoelectric Performance for Efficient Thermoelectrics

Improvement to the thermoelectric properties of PEDOT:PSS

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