Efficient and air-stable n-type doping in organic semiconductors

Chemical Society Reviews, Год журнала: 2023, Номер 52(11), С. 3842 - 3872

Опубликована: Янв. 1, 2023

In this review, the key factors that determined air stability and doping efficiency of n-type doped organic semiconductors were summarized, together with discussion their applications in electronics.

Язык: Английский

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Challenges and opportunities in low-dimensional thermoelectric nanomaterials

Materials Today, Год журнала: 2023, Номер 66, С. 137 - 157

Опубликована: Май 25, 2023

Язык: Английский

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An n‐Type Polythiophene Derivative with Excellent Thermoelectric Performance

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(18)

Опубликована: Март 3, 2023

Typical n-type conjugated polymers are based on fused-ring electron-accepting building blocks. Herein, we report a non-fused-ring strategy to design polymers, i.e. introducing electron-withdrawing imide or cyano groups each thiophene unit of polythiophene backbone. The resulting polymer, n-PT1, shows low LUMO/HOMO energy levels -3.91 eV/-6.22 eV, high electron mobility 0.39 cm2 V-1 s-1 and crystallinity in thin film. After n-doping, n-PT1 exhibits excellent thermoelectric performance with an electrical conductivity 61.2 S cm-1 power factor (PF) 141.7 μW m-1 K-2 . This PF is the highest value reported so far for this first time derivatives be used organic thermoelectrics. due its superior tolerance doping. work indicates that without fused rings low-cost high-performance polymers.

Язык: Английский

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High n-type and p-type conductivities and power factors achieved in a single conjugated polymer

Science Advances, Год журнала: 2023, Номер 9(8)

Опубликована: Фев. 24, 2023

The charge transport properties of conjugated polymers are commonly limited by the energetic disorder. Recently, several amorphous with planar backbone conformations and low disorder have been investigated for applications in field-effect transistors thermoelectrics. However, there is a lack strategy to finely tune interchain π-π contacts these that severely restricts transport. Here, we demonstrate it feasible achieve excellent conductivity thermoelectric performance based on thiophene-fused benzodifurandione oligo( p -phenylenevinylene) through reducing crystallization rate side chains and, this way, carefully controlling degree contacts. N-type (p-type) conductivities more than 100 S cm −1 (400 ) power factors 200 μW m K −2 (100 were achieved within single polymer doped different dopants. It further demonstrated state-of-the-art output first flexible single-polymer generator.

Язык: Английский

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Tunable Charge Transport and Spin Dynamics in Two-Dimensional Conjugated Metal–Organic Frameworks

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(4), С. 2574 - 2582

Опубликована: Янв. 17, 2024

Two-dimensional conjugated metal–organic frameworks (2D c-MOFs) have attracted increasing interest in electronics due to their (semi)conducting properties. Charge-neutral 2D c-MOFs also possess persistent organic radicals that can be viewed as spin-concentrated arrays, affording new opportunities for spintronics. However, the strong π-interaction between neighboring layers of layer-stacked annihilates active spin centers and significantly accelerates relaxation, severely limiting potential qubits. Herein, we report precise tuning charge transport dynamics via control interlayer stacking. The introduction bulky side groups on ligands enables a significant dislocation from serrated stacking staggered stacking, thereby spatially weakening interactions. As consequence, electrical conductivity decreases by 6 orders magnitude, while density achieves more than 30-fold increase spin–lattice relaxation time (T1) is increased up ∼60 μs, hence being superior reference with compact stackings whose too fast detected. Spin results reveal spinless polaron pairs or bipolarons play critical roles these c-MOFs. Our strategy provides bottom-up approach enlarging c-MOFs, opening pathways developing MOF-based

Язык: Английский

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An n‐Type Conjugated Polymer with Low Crystallinity for High‐Performance Organic Thermoelectrics

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(20)

Опубликована: Март 8, 2024

Abstract Conjugated polymers (CPs) with low crystallinity are promising candidates for application in organic thermoelectrics (OTEs), particularly flexible devices, because the disordered structures of these CPs can effectively accommodate dopants and ensure robust resistance to bending. However, n‐doped usually exhibit poor thermoelectric performance, which hinders development high‐performance generators. Herein, we report an n‐type CP (ThDPP‐CNBTz) comprising two acceptor units: a thiophene‐flanked diketopyrrolopyrrole cyano‐functionalized benzothiadiazole. ThDPP‐CNBTz shows LUMO energy level below −4.20 eV features crystallinity, enabling high doping efficiency. Moreover, dual‐acceptor design enhances polaron delocalization, resulting good performance. After n‐doping, exhibits average electrical conductivity ( σ ) 50.6 S cm −1 maximum power factor (PF) 126.8 μW m K −2 , is among highest values reported solution‐processed date. Additionally, OTE device based on doped PF 70 ; also remarkable bending strain, only marginal change after 600 cycles. The findings presented this work will advance devices particular.

Язык: Английский

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Thermoelectric Materials: Current Status and Future Challenges

Frontiers in Electronic Materials, Год журнала: 2021, Номер 1

Опубликована: Июль 20, 2021

SPECIALTY GRAND CHALLENGE article Front. Electron. Mater, 19 August 2021 | https://doi.org/10.3389/femat.2021.677845

Язык: Английский

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Approaching disorder-tolerant semiconducting polymers

Nature Communications, Год журнала: 2021, Номер 12(1)

Опубликована: Сен. 29, 2021

Doping has been widely used to control the charge carrier concentration in organic semiconductors. However, conjugated polymers, n-doping is often limited by tradeoff between doping efficiency and mobilities, since dopants randomly distribute within leading significant structural energetic disorder. Here, we screen a large number of polymer building block combinations explore possibility designing n-type polymers with good tolerance dopant-induced We show that carefully designed single dominant planar backbone conformation, high torsional barrier at each dihedral angle, zigzag curvature highly dopable can tolerate With these features, diketopyrrolopyrrole (DPP)-based be efficiently n-doped exhibit electrical conductivities over 120 S cm-1, much higher than reference similar chemical structures. This work provides design concept for conductive polymeric

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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