All-acceptor polymers with noncovalent interactions for efficient ambipolar transistors,Journal of Materials Chemistry C

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All-acceptor polymers with noncovalent interactions for efficient ambipolar transistors
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2019/12/20 , DOI: 10.1039/c9tc05944j
Zhicai Chen _{1,

2,

3,

4,

5} , Mingguang Li _{1,

2,

3,

4,

5} , Mengxiao Hu _{6,

7,

8,

9,

10} , Shuang Wang _{1,

2,

3,

4,

5} , Zhagen Miao _{6,

7,

8,

9,

10} , Shen Xu _{1,

2,

3,

4,

5} , Cailin Chen _{1,

2,

3,

4,

5} , Huanli Dong _{6,

7,

8,

9,

10} , Wei Huang _{1,

2,

3,

4,

5} , Runfeng Chen _{1,

2,

3,

4,

5}

Affiliation

Exciting progress has been made recently regarding organic field-effect transistors (OFETs) owing to significant efforts devoted to the material design of semiconducting conjugated small molecules and polymers. However, the development of ambipolar or n-type OFETs lags behind that of p-type devices. Here, we propose a new strategy for the design of ambipolar polymers based on acceptors (A) of diazines (pyridazine or pyrazine) in a “moderate A-weak A (mA-wA)” architecture by integrating intrachain noncovalent interactions to rationally engineer the electronic structure, molecular planarity and backbone curvature of the conjugated copolymers. Thus designed mA-wA polymers with intrachain N⋯S interactions exhibit both high-lying HOMO and low-lying LUMO energy levels for ambipolar charge transport and good planarity with a linear backbone for high and balanced hole and electron mobilities up to 0.39 and 0.30 cm² V⁻¹ s⁻¹, respectively. Furthermore, the flexible OFETs fabricated on polyethylene terephthalate substrates show high mobilities of 0.26 and 0.32 cm² V⁻¹ s⁻¹ for holes and electrons, respectively. This design strategy with the newly discovered diazine acceptors to invoke both mA-wA and NCI effects in conjugated polymers for backbone engineering may be applicable to other systems, representing an advanced concept for the construction of high-performance ambipolar polymers.

中文翻译：

具有非共价相互作用的全受体聚合物，可用于高效的双极性晶体管

由于有机共轭小分子和聚合物的材料设计方面的巨大努力，最近在有机场效应晶体管（OFET）方面取得了令人激动的进展。但是，双极性或n型OFET的发展落后于p型器件。在此，我们通过整合链内非共价相互作用来合理地设计双链聚合物，以“中度A-弱A（mA-wA）”结构中的二嗪（哒嗪或吡嗪）的受体（A）为基础，设计双极性聚合物的新策略。共轭共聚物的电子结构，分子平面度和主链曲率。分别为² V^-1 s^-1。此外，在聚对苯二甲酸乙二醇酯基底上制造的柔性OFET显示出对于空穴和电子的高迁移率分别为0.26和0.32cm² V^-1 s^-1。这种具有新发现的二嗪受体的设计策略可以在骨架聚合物的共轭聚合物中调用mA-wA和NCI效应，这可能适用于其他系统，代表了构建高性能双极性聚合物的先进概念。

更新日期：2020-02-13

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