In the last decade, the polymeric poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) semiconductor has been widely studied for their electrical and electrochemical properties and used in various applications such as flexible and transparent electrodes, optoelectronics and thermoelectric devices. Here, we report the intrinsic electromechanical coupling in trilayered stainless steel/PEDOT:PSS/Aluminum composites. The PEDOT:PSS thin film integrated in the multi‐layer serves as the transduction material itself and yields a remarkable flexoelectric‐like response when the cantilever shaped‐ device assembly is subjected to beam bending. Two orders of magnitude larger flexoelectric coefficients (up to μ′₁₂ = 6 μC/m) were obtained for semiconducting PEDOT:PSS thin films, in comparison with those measured for insulating polymers. Besides, it is observed that flexoelectric effect may be enhanced when the conductivity of the trilayer device increases to a certain extent, especially after a simple dilution treatment that induces partial removal of excess hydrophilic PSS. These first results may open a new avenue for simply preparing flexible and highly sensitive curvature sensors with single electroactive semiconducting polymer layer between metal electrodes.

中文翻译：

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揭示聚（3,4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）薄膜的类似挠电的响应

在过去的十年中，聚合物聚（3,4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）半导体因其电和电化学性能而受到广泛研究，并用于各种应用，例如柔性和透明电极，光电和热电设备。在这里，我们报告了三层不锈钢/ PEDOT：PSS /铝复合材料中的固有机电耦合。集成在多层中的PEDOT：PSS薄膜本身就是一种转导材料，当悬臂成形设备组件受到束弯时，它会产生显着的类似柔电的响应。量值较大的挠曲电系数的两个数量（最多μ ' ₁₂与绝缘聚合物的测量结果相比，半导体PEDOT：PSS薄膜获得了6μC/ m）的电导率。此外，观察到，当三层装置的电导率增加到一定程度时，尤其是在引起部分去除过量亲水性PSS的简单稀释处理之后，可以增强挠电效应。这些最初的结果可能为简单地制备在金属电极之间具有单个电活性半导体聚合物层的柔性和高灵敏度曲率传感器开辟新的途径。