Side‐Chain‐Free Benzothiadiazole‐Based Thermoelectric Polymers with Enhanced Electrical Conductivity and Thermal Stability by Acid Cleavage DOI
Fei Zhong, Yuanhui Zheng, Jian Song

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 26, 2025

Abstract The presence of insulating side chains in conductive polymers often impedes intermolecular interactions and localizes charge carriers, thereby deteriorating transport properties. In this study, side‐chain‐free benzothiadiazole (BT)‐based are synthesized using a thermal‐assisted rapid acid cleavage (TRAC) method, which achieves complete removal silane from the parent polymer preliminary doping by trifluoromethanesulfonic (TfOH). Remarkably, compared to SiFBT‐TT SiBT‐TT, Hall mobility FeCl 3 ‐doped FBT‐TT increased sixfold (from 0.16 ± 0.02 0.93 0.03 cm 2 V −1 s ), while that BT‐TT exhibited 15‐fold enhancement 0.11 0.05 1.60 0.17 due intensified backbone packing upon chain cleavage. Consequently, an exceptional electrical conductivity up 730 S power factor 81 µW m K −2 , representing new benchmark for BT‐based polymers. Additionally, factors remained stable even after prolonged heating at 100 °C 1000 min, attributed strengthened between highly delocalized backbones dopant anions. This work provides approach design thermoelectric with both high outstanding thermal stability.

Language: Английский

Side‐Chain‐Free Benzothiadiazole‐Based Thermoelectric Polymers with Enhanced Electrical Conductivity and Thermal Stability by Acid Cleavage DOI
Fei Zhong, Yuanhui Zheng, Jian Song

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 26, 2025

Abstract The presence of insulating side chains in conductive polymers often impedes intermolecular interactions and localizes charge carriers, thereby deteriorating transport properties. In this study, side‐chain‐free benzothiadiazole (BT)‐based are synthesized using a thermal‐assisted rapid acid cleavage (TRAC) method, which achieves complete removal silane from the parent polymer preliminary doping by trifluoromethanesulfonic (TfOH). Remarkably, compared to SiFBT‐TT SiBT‐TT, Hall mobility FeCl 3 ‐doped FBT‐TT increased sixfold (from 0.16 ± 0.02 0.93 0.03 cm 2 V −1 s ), while that BT‐TT exhibited 15‐fold enhancement 0.11 0.05 1.60 0.17 due intensified backbone packing upon chain cleavage. Consequently, an exceptional electrical conductivity up 730 S power factor 81 µW m K −2 , representing new benchmark for BT‐based polymers. Additionally, factors remained stable even after prolonged heating at 100 °C 1000 min, attributed strengthened between highly delocalized backbones dopant anions. This work provides approach design thermoelectric with both high outstanding thermal stability.

Language: Английский

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