Fully flexible piezoelectric tactile sensors with low power consumption and high sensitivity play an important role in artificial intelligence, advanced manufacturing, and smart wearable devices. Herein, we constructed a high-performance, energy-efficient, and fully flexible piezoelectric tactile sensor based on piezotronic effect through the integration of piezoelectric materials with the mechanical-to-electrical conversion function of β polyvinylidene fluoride (PVDF) nanorod arrays and the signal amplification function of organic field-effect transistor (OFET) devices. PVDF nanorod arrays, which considerably improve the piezoelectric properties of materials, transform the external mechanical force into piezoelectric voltage to drive the OFET. Further, the piezoelectric voltage can be effectively amplified using an OFET to improve the sensitivity of the tactile sensor. Enabled by the unique structure of sensing devices and well-defined active materials, the fabricated tactile sensor exhibited excellent pressure sensitivity, detection limit, and response time of 5.17 kPa⁻¹, 175 Pa, and 150 ms, respectively. In addition, using a sophisticated fabrication process, we demonstrated a flexible integrated tactile sensor array with a 3 × 3 cell on a polyethylene terephthalate (PET) substrate to detect the bending angle of the user's wrist on which the fabricated device was mounted. This study uses piezotronic transistors to convert pressure into electrical signals without applying a gate voltage, which can substantially simplify circuit models and sensor distribution; additionally, the fabricated device provides technical support for flexible electronic skin (e-skin).

低功耗，高灵敏度的全柔性压电触觉传感器在人工智能，先进制造和智能可穿戴设备中起着重要作用。本文中，我们通过将压电材料与具有机电转换功能的β材料集成在一起，基于压电效应构建了一种高性能，高能效，全柔性压电触觉传感器聚偏二氟乙烯（PVDF）纳米棒阵列和有机场效应晶体管（OFET）器件的信号放大功能。PVDF纳米棒阵列极大地改善了材料的压电性能，将外部机械力转换为压电电压以驱动OFET。此外，可以使用OFET有效地放大压电电压，以提高触觉传感器的灵敏度。通过感测装置和良好限定的活性材料，所制造的触觉传感器表现出优异的压力敏感性，检出限，和响应的时间5.17的kPa⁻独特的结构使能¹，分别为175 Pa和150 ms。此外，我们使用复杂的制造工艺，演示了在聚对苯二甲酸乙二酯（PET）基板上具有3×3单元的柔性集成式触觉传感器阵列，以检测安装了该装置的用户手腕的弯曲角度。这项研究使用压电晶体管在不施加栅极电压的情况下将压力转换为电信号，从而可以大大简化电路模型和传感器分布。另外，所制造的设备为柔性电子皮肤（e-skin）提供了技术支持。