Organic electrochemical transistors (OECTs) have attracted great attention since their discovery in 1984 due to their flexibility and biocompatibility. Although an intense focus has been put on the design of new organic semiconductors, fewer efforts are directed toward the development of optimized electrolytes. However, the electrolyte is an integral part of OECTs and strongly influences the transient responses of these devices. Also, best performing OECTs currently use liquid electrolytes, but there is a growing need for solid electrolytes, as they can be easily integrated into wearable devices. In this paper, we demonstrate that ionic liquid crystal elastomers (iLCEs) can be used as solid electrolytes of flexible, substrate-free organic electrochemical transistors. We introduce the alignment of the director of the liquid crystal elastomers as a new parameter to tune and improve both steady state and transient responses. The normalized maximum transconductance g_m/w of the most sensitive iLCE was found to be the highest (7 Sm⁻¹) among all solid state-based OECTs.

中文翻译：

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基于离子液晶弹性体的柔性有机电化学晶体管：固体电解质定向排列的影响

有机电化学晶体管 (OECT) 自 1984 年被发现以来，由于其柔韧性和生物相容性而备受关注。尽管人们将重点放在了新型有机半导体的设计上，但针对优化电解质开发的努力却较少。然而，电解质是 OECT 不可或缺的一部分，并强烈影响这些设备的瞬态响应。此外，目前性能最佳的 OECT 使用液体电解质，但对固体电解质的需求不断增长，因为它们可以轻松集成到可穿戴设备中。在本文中，我们证明了离子液晶弹性体 (iLCE) 可用作柔性、无基板有机电化学晶体管的固体电解质。我们将液晶弹性体的导向器的排列作为一个新参数来调整和改善稳态和瞬态响应。归一化的最大跨导 g发现最敏感的 iLCE 的_m /w在所有基于固态的 OECT中最高（7 Sm ^{-1 ）。}