Investigating the stretchability of doped poly(3-hexylthiophene)-block-poly(butyl acrylate) conjugated block copolymer thermoelectric thin films

Zheng, Qin; Lin, Yan‐Cheng; Lin, Yao; Chang, Yun; Wu, Wei-Ni; Lin, Jhih-Min; Tung, Shih‐Huang; Chen, Wen‐Chang

doi:10.1016/j.cej.2023.145121

Cited by 8 publications

(1 citation statement)

References 75 publications

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“…By a similar vapor doping process, Zheng et al 116 prepared F4TCNQ-doped P3HT- block -poly(butyl acrylate) (P3HT- b -PBA) films. The doping level was also adjusted via changing the doping time, and in turn tuning the thermoelectric performance of the resulting film.…”

Section: Application Of P3ht In Thermoelectricsmentioning

confidence: 99%

Recent progress of poly(3-hexylthiophene)-based materials for thermoelectric applications

Zhu,

He,

Zhang

et al. 2024

Mater. Chem. Front.

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Section: Application Of P3ht In Thermoelectricsmentioning

confidence: 99%

Recent progress of poly(3-hexylthiophene)-based materials for thermoelectric applications

Zhu,

He,

Zhang

et al. 2024

Mater. Chem. Front.

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Organic Thermoelectric Devices for Energy Harvesting and Sensing Applications

Ji,

Li,

Liu

et al. 2024

Adv Materials Technologies

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The rise of artificial intelligence and the Internet of Things have spurred an increasing demand for wearable, sustainable, and maintenance‐free power sources. Organic thermoelectric (OTE) devices are emerged as promising candidates because they are capable of converting heat energy into electricity directly without the need of moving parts, capable of flexible and seamless integration with multifunctional miniaturized electronics. In addition, OTE devices can perform straightforward as various self‐powered sensors, boosting their applications in the field of intelligent interactions. This review focuses on recent advances in OTE materials and devices for applications in energy harvesting and sensing. The basic knowledge and key parameters of OTE materials and devices are presented, followed by detailed introduction of recent progress of OTE generators, sensors, and other OTE‐integrated devices. Next, several aspects of optimizing OTE devices toward multifunctional applications are highlighted. Finally, an overview of the current challenges and future research directions of OTE‐based devices is addressed. It is hoped that this review can pave the way for speeding up a bright future for the development and practical applications of OTE devices.

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N‐Type Molecular Thermoelectrics Based on Solution‐Doped Indenofluorene‐Dimalononitrile: Simultaneous Enhancement of Doping Level and Molecular Order

Wang,

Wei,

Rillaerts

et al. 2024

Adv Materials Technologies

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The development of n‐type organic thermoelectric materials, especially π‐conjugated small molecules, lags far behind their p‐type counterparts, due primarily to the scarcity of efficient electron‐transporting molecules and the typically low electron affinities of n‐type conjugated molecules that leads to inefficient n‐doping. Herein, the n‐doping of two functionalized (carbonyl vs dicyanovinylene) indenofluorene‐based conjugated small molecules, 2,8‐bis(5‐(2‐octyldodecyl)thien‐2‐yl)indeno[1,2‐b]fluorene‐6,12‐dione (TIFDKT) and 2,2′‐(2,8‐bis(3‐alkylthiophen‐2‐yl)indeno[1,2‐b]fluorene‐6,12‐diylidene)dimalononitrile (TIFDMT) are demonstrated, with n‐type dopant N‐DMBI. While TIFDKT shows decent miscibility with N‐DMBI, it can be hardly n‐doped owing to its insufficiently low LUMO. On the other hand, TIFDMT, despite a poorer miscibility with N‐DMBI, can be efficiently n‐doped, reaching a respectable electrical conductivity of 0.16 S cm−1. Electron paramagnetic resonance measurements confirm the efficient n‐doping of TIFDMT. Based on density functional theory (DFT) calculations, the LUMO frontier orbital energy of TIFDMT is much lower, and its wave function is more delocalized compared to TIFDKT. Additionally, the polarons are more delocalized in the n‐doped TIFDMT. Remarkably, as indicated by the grazing‐incidence wide‐angle X‐ray scattering (GIWAXS), the molecular order for TIFDMT thin‐film is enhanced by n‐doping, leading to more favorable packing with edge‐on orientation and shorter π‐π stacking distances (from 3.61 to 3.36 Å). This induces more efficient charge transport in the doped state. Upon optimization, a decent thermoelectric power factor of 0.25 µWm−1K−2 is achieved for n‐doped TIFDMT. This work reveals the effect of carbonyl vs dicyanovinylene on the n‐doping efficiency, microstructure evolution upon doping and thermoelectric performance, offering a stepping stone for the future design of efficient n‐type thermoelectric molecules.

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Investigating the stretchability of doped poly(3-hexylthiophene)-block-poly(butyl acrylate) conjugated block copolymer thermoelectric thin films

Cited by 8 publications

References 75 publications

Recent progress of poly(3-hexylthiophene)-based materials for thermoelectric applications

Recent progress of poly(3-hexylthiophene)-based materials for thermoelectric applications

Organic Thermoelectric Devices for Energy Harvesting and Sensing Applications

N‐Type Molecular Thermoelectrics Based on Solution‐Doped Indenofluorene‐Dimalononitrile: Simultaneous Enhancement of Doping Level and Molecular Order

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