High‐Performance Ambipolar Polymers Based on Electron‐Withdrawing Group Substituted Bay‐Annulated Indigo

Yang, Jie; Jiang, Yaqian; Tu, Zeyi; Zhao, Zhiyuan; Chen, Jinyang; Yi, Zhengran; Li, Yifan; Wang, Shuai; Yi, Yuanping; Guo, Yunlong; Liu, Yunqi

doi:10.1002/adfm.201804839

Cited by 32 publications

(29 citation statements)

References 43 publications

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“…Polymer materials with advantages of superior viscosity, thermal, mechanical and simple processing characteristics have been proverbially employed in photovoltaics (PV), transistors, light‐emitting diodes, logic circuits, sensors, etc . Particularly, D–A polymers that possess noncovalent intramolecular interactions for efficient π‐conjugation and close stacking ensuring intermolecular charge hopping have been extensively investigated . The conjugated polymers consisting of donors including selenophenes and thiophenes and acceptors comprising DPPs, NDIs, isoindigos, thiadiazolopyridine, naphthalenedicarboximide, and benzothiadiazole are mainly synthesized via Stille, Suzuki, and direct arylation polycondensation.…”

Section: Ambipolar Organic Semiconducting Materialsmentioning

confidence: 99%

Recent Advances in Ambipolar Transistors for Functional Applications

Ren

Yang

Zhou

et al. 2019

Adv Funct Materials

170

139

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Ambipolar transistors represent a class of transistors where positive (holes) and negative (electrons) charge carriers both can transport concurrently within the semiconducting channel. The basic switching states of ambipolar transistors are comprised of common off-state and separated on-state mainly impelled by holes or electrons. During the past years, diverse materials are synthesized and utilized for implementing ambipolar charge transport and their further emerging applications comprising ambipolar memory, synaptic, logic, and light-emitting transistors on account of their special bidirectional carrier-transporting characteristic. Within this review, recent developments of ambipolar transistor field involving fundamental principles, interface modifications, selected semiconducting material systems, device structures, ambipolar characteristics, and promising applications are highlighted. The existed challenges and prospective for researching ambipolar transistors in electronics and optoelectronics are also discussed. It is expected that the review and outlook are well timed and instrumental for the rapid progress of academic sector of ambipolar transistors in lighting, display, memory, as well as neuromorphic computing for artificial intelligence.

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Section: Ambipolar Organic Semiconducting Materialsmentioning

confidence: 99%

Recent Advances in Ambipolar Transistors for Functional Applications

Ren

Yang

Zhou

et al. 2019

Adv Funct Materials

170

139

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“…Liu et al developed a two-step method to obtain a series of copolymers (P29a−P29c) based on BAI with different substituents (H, F, and Cl). [83] Fluorination and chlorination of the polymers effectively lowered both the HOMO and LUMO energy levels compared with P29a. P29b and P29c showed low-lying HOMO/LUMO energy levels of −5.58/−3.72 and −5.32/−3.70 eV, respectively.…”

Section: Enhancing the Ew Ability Of Acceptorsmentioning

confidence: 97%

“…[80,81] 2) Similar to F substitution, chlorine (Cl) substitution can lower the FMO energy levels of polymers. [82,83] However, Cl atoms might cause steric hindrance in the molecule due to a large van der Waals radius (r Cl = 1.80 Å), which is harmful to π-conjugate and intermolecular π-π stacking. [15] 3) In addition to the F and Cl atoms, CN group is also a strong EWG that can significantly lower the FMO energy levels of polymers.…”

Section: Design Strategies For Improving Electron Transport In Ofetsmentioning

confidence: 99%

Acceptor Modulation Strategies for Improving the Electron Transport in High‐Performance Organic Field‐Effect Transistors

et al. 2021

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High‐performance ambipolar and electronic type semiconducting polymers are essential for fabricating various organic optoelectronic devices and complementary circuits. This review summarizes the strategies of improving the electron transport of semiconducting polymers via acceptor modulation strategies, which include the use of single, dual, triple, multiple, and all acceptors as well as the fusion of multiple identical acceptors to obtain new heterocyclic acceptors. To further improve the electron transport of semiconducting polymers, the introduction of strong electron‐withdrawing groups can enhance the electron‐withdrawing ability of donors and acceptors, thereby facilitating electron injection and suppressing hole accumulation. In addition, the relationships between the molecular structure, frontier molecular orbital energy levels, thin film morphology, microstructure, processing conditions, and device performances are also comprehensively discussed. Finally, the challenges encountered in this research area are proposed and the future outlook is presented.

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“…Based on bay-annulated indigo (BAI) compounds, Yang et al introduced electron-withdrawing groups (F and Cl) to the backbone and obtained P4 to P6 (shown in Figure ). The FMO energy levels were lowered after F and Cl substitution and the HOMO/LUMO energy levels of P4 to P6 were −5.22/–3.65, – 5.58/–3.72, and–5.32/–3.70 eV, respectively. Because of the electronegativity and empty 3d orbitals of the Cl atom, the LUMO energy level was lowered and the π-electrons from donors could be accepted after Cl substitution.…”

Section: Molecular Design Of High-performance Semiconducting Polymersmentioning

confidence: 99%

Toward Efficient Charge Transport of Polymer-Based Organic Field-Effect Transistors: Molecular Design, Processing, and Functional Utilization

Zhao

Liu

2021

Acc. Mater. Res.

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Conspectus Polymer-based organic field-effect transistors (OFETs) have attracted great attention owing to their significantly improved performance and the recently emerged prospects for broad applications. The charge carrier mobility of polymer-based OFETs has been improved from 10–5 to more than 10 cm2 V–1 s–1 over the past three decades. With the carrier mobility close to or higher than that of amorphous silicon, the application fields of polymer-based OFETs have been extended from sensing to logic or drive circuits. During OFET operation, the charge carriers are successively injected in and then transferred across the semiconducting channel under an external electric field. The behavior of the charge carriers is determined by both charge injection and charge transport. Well-matched frontier molecular orbital (FMO) energy levels and optimized hierarchical structures of semiconducting polymers are essential for the realization of high-performance polymer-based OFETs. In this Account, we mainly demonstrate our recent progress in molecular design strategies and fabrication processing methods for high-performance semiconducting polymers. Moreover, we provide some examples of integrated applications of polymer-based OFETs. The convenient FMO energy level modulation and excellent molecular designability of donor–acceptor (D–A) conjugated polymers facilitate studies on their performance enhancement in OFETs. Proper molecular design of the D–A polymer backbone and side chain can significantly contribute to charge injection enhancement, transport pathway establishment, and trap reduction, thereby resulting in efficient charge transport. Moreover, special fabrication processes of OFET devices can further enhance the charge transport by optimizing the hierarchical structures of semiconducting polymers, thereby enhancing their carrier mobility and stability. By employing high-performance semiconducting polymers as the semiconducting channel of OFETs, various applications can be implemented. These applications range from small-scale logic signal processing and periodic signal generation to complex visual perception systems, indicating broad application prospects in human life. The works on performance improvement and functional utilization of the semiconducting polymers in OFETs might provide insights for molecular design strategies and applications for future plastic electronics.

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High‐Performance Ambipolar Polymers Based on Electron‐Withdrawing Group Substituted Bay‐Annulated Indigo

Cited by 32 publications

References 43 publications

Recent Advances in Ambipolar Transistors for Functional Applications

Recent Advances in Ambipolar Transistors for Functional Applications

Acceptor Modulation Strategies for Improving the Electron Transport in High‐Performance Organic Field‐Effect Transistors

Toward Efficient Charge Transport of Polymer-Based Organic Field-Effect Transistors: Molecular Design, Processing, and Functional Utilization

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