Amphipathic Side Chain of a Conjugated Polymer Optimizes Dopant Location toward Efficient N‐Type Organic Thermoelectrics

Advanced Materials, Год журнала: 2020, Номер 33(4)

Опубликована: Дек. 11, 2020

Abstract There is no molecular strategy for selectively increasing the Seebeck coefficient without reducing electrical conductivity organic thermoelectrics. Here, it reported that use of amphipathic side chains in an n‐type donor–acceptor copolymer can increase and thus power factor by a ≈5. The chain contains alkyl segment as spacer between polymer backbone ethylene glycol type segment. this does not only reduce energetic disorder conjugated film but also properly control dopant sites away from backbone, which minimizes adverse influence counterions. As confirmed kinetic Monte Carlo simulations with host–dopant distance variable, reduced Coulombic interaction resulting larger contributes to higher given conductivity. Finally, optimized 18 µW m –1 K –2 achieved doped film. This work provides facile improving opens up new route optimizing location toward realizing better polymeric

Язык: Английский

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Soft Organic Thermoelectric Materials: Principles, Current State of the Art and Applications

Small, Год журнала: 2021, Номер 18(12)

Опубликована: Дек. 18, 2021

Abstract The enormous demand for waste heat utilization and burgeoning eco‐friendly wearable materials has triggered huge interest in the development of thermoelectric that can harvest low‐cost energy resources by converting to electricity efficiently. In particular, due their high flexibility, nontoxicity, cost‐effectivity, promising applicability various fields, organic are drawing more attention compared with toxic, expensive, heavy, brittle inorganic counterparts. Organic approaching figure merit ones via construction optimization unique transport pathways device geometries. This review presents recent interdependence decoupling principles efficiency parameters as well new achievements performance materials. Moreover, this also discusses advances devices emphasis on energy‐related applications. It is believed emerging green alternatives rivaling conventional counterparts efficient pure harvesting from solar thermal energy.

Язык: Английский

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Organic Thermoelectric Materials: Niche Harvester of Thermal Energy

Advanced Functional Materials, Год журнала: 2022, Номер 33(3)

Опубликована: Ноя. 23, 2022

Abstract Organic thermoelectric (OTE) materials promise convenient energy conversion between heat gradients and voltage with flexible wearable power‐supplying devices at a low price. Although variety of OTE are investigated, the TE performance is still far from practical application. To achieve high performance, thorough understanding structure–property relationship in necessary. In this comprehensive review, fundamentals OTEs summarized, recent achievements reviewed, structure properties high‐performance discussed. Furthermore, how molecular backbones, side chains, levels, packing, heteroatom effect all play vital roles addressed. Finally, future direction research on envisaged.

Язык: Английский

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Recent advances in n-type organic thermoelectric materials, dopants, and doping strategies

Journal of Materials Chemistry C, Год журнала: 2022, Номер 10(16), С. 6114 - 6140

Опубликована: Янв. 1, 2022

Recent advances in the development of n-type organic thermoelectric materials, n-dopants and new doping strategies are summarized current challenges future prospects discussed this research field.

Язык: Английский

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An Amorphous n‐Type Conjugated Polymer with an Ultra‐Rigid Planar Backbone

Angewandte Chemie International Edition, Год журнала: 2022, Номер 62(2)

Опубликована: Ноя. 8, 2022

High charge carrier mobility polymer semiconductors are always semi-crystalline. Amorphous conjugated polymers represent another kind of with different transporting mechanism. Here we report the first near-amorphous n-type decent electron mobility, which features a remarkably rigid, straight and planar backbone. The molecular design strategy is to copolymerize two fused-ring building blocks both electron-accepting, centrosymmetrical planar. alternating copolymer double B←N bridged bipyridine (BNBP) unit benzobisthiazole (BBTz) unit. It shows 0.34 cm2 V-1 s-1 in organic field-effect transistors. excellent property possibly due ultrahigh backbone stiffness, small π-π stacking distance, high weight.

Язык: Английский

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Strategic Insights into Semiconducting Polymer Thermoelectrics by Leveraging Molecular Structures and Chemical Doping

ACS Energy Letters, Год журнала: 2022, Номер 7(12), С. 4299 - 4324

Опубликована: Ноя. 7, 2022

Thermoelectric (TE) materials can realize the direct transformation between heat and electricity, thereby facilitating recycling of waste heat. Semiconducting π-conjugated polymers (π-CPs) have been largely explored as organic TE thanks to facile molecular tunability their electronic properties, room-temperature solution-processability, intrinsic low thermal conductivity, outstanding mechanical flexibility. In this Focus Review, we describe two key strategies─chemical doping structural tailoring─in polymeric TEs for strengthening power factors π-CPs. First, mechanisms are unraveled by a sequential process charge transfer free carrier release, followed introduction various methods enhancing chemical doping. Second, design principles structures including π-backbone side-chain engineering presented. Third, supplementary strategies such polymer chain alignment construction blends identified. Finally, existing prime obstacles future development discussed an outlook on feasible solutions resolving them is provided.

Язык: Английский

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Regulation of High Miscibility for Efficient Charge‐Transport in n‐Doped Conjugated Polymers

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(14)

Опубликована: Фев. 2, 2022

Strong interchain interactions of conjugated polymers usually result in poor miscibility with molecular dopants, limiting the doping efficiency because uncontrolled phase separation. We have developed a strategy to achieve efficient charge-transport and high n-doped polymers. solve issue through disorder side-chains containing dopants better. Systemic structural characterization reveals farther side-chain branching point will lead higher disorders, which provides appropriate sites accommodate extrinsic without harming original chain packings channels. Therefore, better sustainability solid-state microstructure is obtained, yielding stable conductivity even when overloading massive dopants. This work highlights importance realizing host-dopant

Язык: Английский

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An all-C–H-activation strategy to rapidly synthesize high-mobility well-balanced ambipolar semiconducting polymers

Matter, Год журнала: 2022, Номер 5(6), С. 1953 - 1968

Опубликована: Апрель 27, 2022

Язык: Английский

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Insight into conjugated polymers for organic electrochemical transistors

Trends in Chemistry, Год журнала: 2023, Номер 5(4), С. 279 - 294

Опубликована: Фев. 10, 2023

Язык: Английский

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A High‐Performance n‐Type Thermoelectric Polymer from C−H/C−H Oxidative Direct Arylation Polycondensation

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(20)

Опубликована: Март 14, 2023

Abstract n‐Type conjugated polymers (CPs) are crucial in the applications of organic electronics. Direct coupling electron‐deficient C−H monomer via selective activation, namely C−H/C−H oxidative direct arylation polycondensation (Oxi‐DArP), is an ideal approach toward such CPs. Herein, Oxi‐DArP firstly adopted to synthesize a high‐performance n‐type CP using newly developed monomer, i.e., 3,6‐di(thiazol‐5‐yl)‐diketopyrrolopyrrole (Tz‐5‐DPP). Tz‐5‐DPP based homopolymer PTz ‐ 5 DPP with molecular weight 22 kDa has been synthesized Oxi‐DArP. After n‐doping, films exhibited electric conductivity values up 8 S cm −1 and power factors ( PFs ) 106 μW m K −2 . Notably, this PF value highest for polymer thermoelectric materials date. The synthesis excellent performance make work important step straightforward sustainable preparation semiconductors.

Язык: Английский

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