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Semiconducting Small Molecules as Active Materials for p‐Type Accumulation Mode Organic Electrochemical Transistors
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2020-05-15 , DOI: 10.1002/aelm.202000215 Zachary S. Parr 1 , Reem B. Rashid 2 , Bryan D. Paulsen 2 , Benjamin Poggi 1 , Ellasia Tan 1 , Mark Freeley 1 , Matteo Palma 1 , Isaac Abrahams 1 , Jonathan Rivnay 2 , Christian B. Nielsen 1
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2020-05-15 , DOI: 10.1002/aelm.202000215 Zachary S. Parr 1 , Reem B. Rashid 2 , Bryan D. Paulsen 2 , Benjamin Poggi 1 , Ellasia Tan 1 , Mark Freeley 1 , Matteo Palma 1 , Isaac Abrahams 1 , Jonathan Rivnay 2 , Christian B. Nielsen 1
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A series of semiconducting small molecules with bithiophene or bis‐3,4‐ethylenedioxythiophene cores are designed and synthesized. The molecules display stable reversible oxidation in solution and can be reversibly oxidized in the solid state with aqueous electrolyte when functionalized with polar triethylene glycol side chains. Evidence of promising ion injection properties observed with cyclic voltammetry is complemented by strong electrochromism probed by spectroelectrochemistry. Blending these molecules with high molecular weight polyethylene oxide (PEO) is found to improve both ion injection and thin film stability. The molecules and their corresponding PEO blends are investigated as active layers in organic electrochemical transistors (OECTs). For the most promising molecule:polymer blend (P4E4:PEO), p‐type accumulation mode OECTs with µA drain currents, μS peak transconductances, and a µC* figure‐of‐merit value of 0.81 F V−1 cm−1 s−1 are obtained.
中文翻译：
半导体小分子作为p型累积模式有机电化学晶体管的活性材料
设计并合成了一系列具有联噻吩或bis-3,4-乙烯二氧噻吩核的半导体小分子。这些分子在溶液中显示出稳定的可逆氧化，并且在被极性三甘醇侧链官能化时，可以在水性电解质中以固态被可逆氧化。用循环伏安法观察到的有希望的离子注入特性的证据被光谱电化学探测到的强电致变色所补充。已发现将这些分子与高分子量聚环氧乙烷（PEO）混合可改善离子注入和薄膜稳定性。在有机电化学晶体管（OECT）中，将分子及其相应的PEO共混物作为活性层进行了研究。对于最有希望的分子：聚合物共混物（P4E4：PEO），获得-1 cm -1 s -1。
更新日期：2020-05-15
中文翻译：
半导体小分子作为p型累积模式有机电化学晶体管的活性材料
设计并合成了一系列具有联噻吩或bis-3,4-乙烯二氧噻吩核的半导体小分子。这些分子在溶液中显示出稳定的可逆氧化，并且在被极性三甘醇侧链官能化时，可以在水性电解质中以固态被可逆氧化。用循环伏安法观察到的有希望的离子注入特性的证据被光谱电化学探测到的强电致变色所补充。已发现将这些分子与高分子量聚环氧乙烷（PEO）混合可改善离子注入和薄膜稳定性。在有机电化学晶体管（OECT）中，将分子及其相应的PEO共混物作为活性层进行了研究。对于最有希望的分子：聚合物共混物（P4E4：PEO），获得-1 cm -1 s -1。
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