Due to relatively low charge‐carrier mobilities in organic materials, high operational voltages often have to be applied and result in severe limitations. While it has been reported that elastic polymeric dielectrics, containing a very low ion concentration, are able to overcome this bottleneck, a systematic study on the working mechanisms and their implications for sensors is still missing. Due to the possibility to form a double‐layer capacitor while maintaining high insulating properties, such dielectrics enable stable low‐voltage devices, giving access to high current output and high on/off ratio even below 0.5 V. Field‐effect transistor devices are used to characterize this novel class of materials and to unravel their working mechanisms. To address their capability for sensors, a proof‐of‐concept experiment is performed, i.e., photoresponse is characterized and the field‐effect dependence is analyzed. Stable low‐voltage operation is a crucial issue, especially for biosensor applications which typically operate in physiological liquids and are limited by the small electrochemical window of water.

中文翻译：

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固态双层介电基有机场效应晶体管的工作机理及其对传感器的启示

由于有机材料中的载流子迁移率较低，因此通常必须施加较高的工作电压，并导致严重的局限性。虽然据报道，包含非常低的离子浓度的弹性聚合物电介质能够克服这一瓶颈，但仍缺少对工作机制及其对传感器的影响的系统研究。由于可以在保持高绝缘性能的同时形成双层电容器，因此此类电介质可实现稳定的低压器件，即使在低于0.5 V的电压下也可提供高电流输出和高导通/截止比。使用场效应晶体管器件来表征这类新颖的材料并阐明其工作机制。为了解决其传感器功能，进行了概念验证实验，即 表征光响应并分析场效应依赖性。稳定的低压运行是一个关键问题，尤其是对于通常在生理液体中运行且受水的小电化学窗口限制的生物传感器应用而言。