Incorporation of Heteroatoms in Conjugated Polymers Backbone toward Air-Stable, High-Performance n-Channel Unencapsulated Polymer Transistors,Chemistry of Materials

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Incorporation of Heteroatoms in Conjugated Polymers Backbone toward Air-Stable, High-Performance n-Channel Unencapsulated Polymer Transistors
Chemistry of Materials ( IF 7.2 ) Pub Date : 2018-07-07 00:00:00 , DOI: 10.1021/acs.chemmater.8b02359
Feifei Wang ₁ , Yanrong Dai ₁ , Weiwei Wang ₁ , Hongbo Lu _{1,

2} , Longzhen Qiu ₂ , Yunsheng Ding ₂ , Guobing Zhang _{1,

2}

Affiliation

Organic field-effect transistors (OFETs) without any encapsulation of polymer semiconductor layers that still exhibit unipolar n-type characteristics under air conditions are very rare. In this study, we use fluorinated bithiophene as a donor, and bis(2-oxoindolin-3-ylidene)-benzodifuran-dione (BIBDF, P1) and aza-substituted BIBDF (P2) as acceptor units to develop air-stable and unipolar electron transport polymer semiconductors. Unencapsulated OFETs based on P1 and P2 were fabricated and directly evaluated under air conditions. The highest effective mobility (μ_e,max^eff) of 0.23 cm² V^–1 s^–1 was obtained for P2-based devices with high I_on/I_off ratio of >10⁶ and low threshold voltage of 1.1 V. Moreover, P2 had high air stability and maintained unipolar electron transport with μ_e,max^eff of up 0.1 cm² V^–1 s^–1 and I_on/I_off ratio of >10⁶ during the 60 days of air storage. The work provides an effective molecular design strategy to develop air-stable and high-performance n-channel unencapsulated polymer transistors that can be directly operated under air conditions.

中文翻译：

杂原子在共轭聚合物主干中向空气稳定的高性能n通道未封装聚合物晶体管的掺入

没有封装任何在空气条件下仍表现出单极n型特性的聚合物半导体层的有机场效应晶体管（OFET）非常罕见。在这项研究中，我们使用氟化联噻吩作为供体，并使用双（2-氧代吲哚-3-亚基）-苯并二呋喃二酮（BIBDF，P1）和氮杂取代的BIBDF（P2）作为受体单元，以开发稳定的空气和单极性电子传输聚合物半导体。制作了基于P1和P2的未封装的OFET，并在空气条件下直接进行了评估。最高有效迁移率（μe _，max^eff）为0.23 cm ² V ^–1 s ^–1对于高I _on / I _off比> 10 ⁶和低阈值电压1.1 V的P2基器件，获得了P2器件。此外，P2具有较高的空气稳定性，并保持单极性电子传输，μe _，最大^eff可达0.1 cm ²在空气储存60天期间，V ^–1 s ^–1和I _on / I _off比> 10 ⁶。这项工作为开发空气稳定和高性能的纳米粒子提供了有效的分子设计策略。通道的未封装聚合物晶体管，可以在空气条件下直接运行。

更新日期：2018-07-07

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