Balancing Solubility and Thermoelectric Performance in π-Extended Poly(benzimidazoanthradiisoquinolinedione) Ladder-Type Conjugated Polymer

He, Qiang; Zhang, Xiaopeng; Tam, Teck Lip Dexter; Wang, Jia‐Ning; Chen, Hongming; Chien, Sheau Wei; Tham, Nguk Neng; Koh, Xue Qi; Lee, Johnathan Joo Cheng; Lin, Ming; Soh, Peng Xian; Meng, Hong; Huang, Wei; Xu, Jianwei

doi:10.1021/acsaelm.3c00294

Cited by 2 publications

(1 citation statement)

References 43 publications

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“…As shown in Figure S8 in the Supporting Information, these films appeared to be nanoporous, with pore size in the range of a few hundred nanometers. Such nanoporous structures are similar to previously reported solution-processable side-chain-free conjugated ladder polymers, BBL, Cl 4 –BAL, Cl 2 –BAL, and PBBTL . Grazing incidence wide-angle X-ray scattering (GIWAXS) measurements of their thin films (Figure a, b, and Figure S9 in the Supporting Information) indicate that PBBTL-CH 3 has an exclusive edge-on orientation (Figure c) while PBBTL-Ph showed mixed orientation with both face-on and edge-on orientations (Figure d).…”

Section: Results and Discussionsupporting

confidence: 86%

Thermoelectric Performance Enhancement of p-Type Pyrrolo[3,2-b:4,5-b′]bis[1,4]benzothiazine Conjugated Ladder Polymer by Pendant Group Engineering

He,

Wang,

Dexter Tam

et al. 2023

ACS Materials Lett.

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Organic thermoelectrics have attracted widespread attention due to the possibility of harnessing ambient thermal energy to power Internet-of-things and wearables due to their flexibility, low cost, and large-scale production, but research progress still lags behind that of inorganic materials. Rigid ladder-type conjugated polymers consisting of doublestranded fused-ring structure exhibit excellent thermal and electrochemical stabilities and thus are promising materials for organic thermoelectrics. However, effective synthesis, characterization, and solution processing are challenging and thus limit its application in thin-film devices. Here, two p-type pyrrolo[3,2b:4,5-b′]bis [1,4]benzothiazine ladder-type conjugated polymers with different pendant groups (methyl: PBBTL-CH 3 and phenyl: PBBTL-Ph) were synthesized, and both can be solution-processed for thin-film thermoelectric applications. PBBTL-CH 3 achieved electrical conductivities as high as 36.29 ± 0.58 S cm −1 and power factors up to 22.7 ± 2.1 μW m −1 K −2 when doped with FeCl 3 , which are significantly higher than of PBBTL-Ph with a conductivity of 1.40 ± 0.16 S cm −1 and a power factor of 1.7 ± 0.2 μW m −1 K −2 . Grazing-incident wide-angle X-ray scattering of the polymers showed PBBTL-CH 3 exhibited exclusive edge-on orientation, while PBBTL-Ph exhibited mixed edge-on and face-on orientation. The present study indicates that pendant groups have important influence on the electrical conductivity and thermoelectric performance for the PBBTL series through alteration of HOMO energy levels, polymer packing, and ease of dopant infiltration.

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Section: Results and Discussionsupporting

confidence: 86%

Thermoelectric Performance Enhancement of p-Type Pyrrolo[3,2-b:4,5-b′]bis[1,4]benzothiazine Conjugated Ladder Polymer by Pendant Group Engineering

He,

Wang,

Dexter Tam

et al. 2023

ACS Materials Lett.

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Stable n‐Type Perylene Derivative Ladder Polymer with Antiambipolarity for Electrically Reconfigurable Organic Logic Gates

Wu,

He,

Zhou

et al. 2024

Advanced Materials

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Organic electrochemical transistors (OECTs) are one of the promising building blocks to realize next‐generation bioelectronics. To date, however, the performance and signal processing capabilities of these devices remain limited by their stability and speed. Herein, we demonstrate a stable and fast n‐type organic electrochemical transistors based on a side‐chain‐free ladder polymer, poly(benzimidazoanthradiisoquinolinedione). The device demonstrated fast normalized transient speed of 0.56 ± 0.17 ms/um2 and excellent long‐term stability in aqueous electrolytes, with no significant drop in its doping current after 50,000 successive doping/dedoping cycles and 2 months storage at ambient conditions. These unique characteristics make this polymer especially suitable for bioelectronics, such as being used as a pull‐down channel in a complementary inverter for long‐term stable detection of electrophysiological signals. Moreover, the developed device shows a reversible anti‐ambipolar behavior, enabling reconfigurable electronics to be realized using a single material. Our results go beyond the conventional OECT and demonstrate the potential of OECTs to exhibit dynamically configurable functionalities for next‐generation reconfigurable electronics.This article is protected by copyright. All rights reserved

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Balancing Solubility and Thermoelectric Performance in π-Extended Poly(benzimidazoanthradiisoquinolinedione) Ladder-Type Conjugated Polymer

Cited by 2 publications

References 43 publications

Thermoelectric Performance Enhancement of p-Type Pyrrolo[3,2-b:4,5-b′]bis[1,4]benzothiazine Conjugated Ladder Polymer by Pendant Group Engineering

Thermoelectric Performance Enhancement of p-Type Pyrrolo[3,2-b:4,5-b′]bis[1,4]benzothiazine Conjugated Ladder Polymer by Pendant Group Engineering

Stable n‐Type Perylene Derivative Ladder Polymer with Antiambipolarity for Electrically Reconfigurable Organic Logic Gates

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