Seebeck coefficient controlled by magnetic field based on the P3HT/PCBM heterojunction device

Wu, Mengying; Duan, Jiashun; Feng, Kai; Yu, Hongtao; Xu, Ling

doi:10.1016/j.orgel.2021.106068

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…In general, the performance of TE materials can be evaluated by both the figure-of-merit ZT value (ZT = S 2 σ T /κ) and power factor (PF = S 2 σ ), where S and σ respectively represent the Seebeck coefficient and electrical conductivity of the material, T is the absolute temperature, and κ stands for the thermal conductivity. [6,7] Recently, organic TE materials, such as polypyrrole (PPy), [8,9] polyaniline (PANI), [10,11] and poly (3,4ethylenecdioxythiophene) (PEDOT), [12][13][14][15][16] have shown promise as competitive substitutes for inorganic TE materials due to their low toxicity, flexibility, and low thermal conductivity. Among organic TE materials, poly(4-styrenesulfonate)doped PEDOT (PEDOT:PSS) has attracted extensive attention because of its easy doping, high transparency, excellent thermal stability, and solution processability.…”

Section: Introductionmentioning

confidence: 99%

Enhanced thermoelectric performance of PEDOT: PSS films via ionic liquid post-treatment

Yang¹,

Li²,

Jia³

et al. 2022

Chinese Phys. B

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Thermoelectric (TE) energy harvesting can effectively convert waste heat into electricity, which is a crucial technology to solve energy concerns. As a promising candidate for energy conversion, poly(3,4-ethylenedioxythiophene): poly (styrene sulfonate) (PEDOT:PSS) has gained significant attention owing to its easy doping, high transparency, and solution processability. However, the TE performance of PEDOT:PSS still needs to be further enhanced. Herein, different approaches have been applied for tuning the TE properties: (i) direct dipping PEDOT:PSS thin films in ionic liquid; (ii) post-treatment of the films with concentrated sulfuric acid (H2SO4), and then dipping in ionic liquid. Besides, the same bis(trifluoromethanesulfonyl)amide (TFSI) anion and different cation salts, including 1-ethyl-3-methylimidazolium (EMIM+) and lithium (Li+), are selected to study the influence of varying cation types on the TE properties of PEDOT:PSS. The Seebeck coefficient and electrical conductivity of the PEDOT:PSS film treated with H2SO4EMIM:TFSI increase simultaneously, and the resulting maximum power factor is 46.7 μW⋅m−1⋅K–2, which may be attributed to the ionic liquid facilitating the rearrangement of the molecular chain of PEDOT. The work provides a reference for the development of organic films with high TE properties.

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