Self-powered multlifunctional sensors have been receiving great attention for their potential use in sustainable wearable electronics. In this work, we demonstrate a facile approach for the development of self-powered multimodal pressure-temperature sensors based on an identical ferroelectric copolymer, poly (vinylidenefluoride-co-trifluoroethylene) (P(VDF-TrFE)) for the contact pair materials by switching the triboelectric polarity via ferroelectric polarization. This approach enables the identical material-based triboelectric devices with remarkably enhanced triboelectric and pyroelectric output performances. The inversely-polarized P(VDF-TrFE) device exhibits ∼106 and ∼12 times higher triboelectric and pyroelectric currents, respectively, compared to those of non-polarized devices. Consequently, our triboelectric device provides the highest pressure sensitivity of 40 nA kPa^-1 and 1.4 V kPa^-1 with a broad pressure detection range (98 Pa to 98 kPa) as well as competitive temperature sensitivity of 0.38 nA °C^-1 and 0.27 nA °C^-1 in cooling and heating states, respectively, compared to previous PVDF-based self-powered sensors. Furthermore, our self-powered sensor can discriminate multiple stimuli including pressure as well as temperature without signal interference. Our sensor can be utilized for the monitoring of weak pulse pressure as well as multimodal finger touch. This work provides a facile fabrication approach to realize triboelectric and pyroelectric multimodal devices with outstanding output performances.

自供电多功能传感器因其在可持续可穿戴电子产品中的潜在用途而受到广泛关注。在这项工作中，我们演示了一种基于相同的铁电共聚物，聚对二氟乙烯-共-三氟乙烯（P（VDF-TrFE））的自供电多峰压力温度传感器开发的简便方法，该方法通过以下方式进行：通过以下方式切换摩擦电的极性铁电极化。这种方法使相同的基于材料的摩擦电器件具有明显增强的摩擦电和热释电输出性能。与非极化器件相比，反极化P（VDF-TrFE）器件的摩擦电流和热电流分别高出约106倍和约12倍。因此，我们的摩擦电器件可提供最高的40 nA kPa ^-1和1.4 V kPa ^-1的压力灵敏度，以及宽的压力检测范围（98 Pa至98 kPa），以及具有竞争力的0.38 nA°C ^-1和0.27的温度灵敏度。nA°C ^-1与以前的基于PVDF的自供电传感器相比，它们分别处于制冷和制热状态。此外，我们的自供电传感器可以区分多种刺激，包括压力和温度，而不会产生信号干扰。我们的传感器可用于监测弱脉冲压力以及多峰手指触摸。这项工作为实现具有出色输出性能的摩擦电和热电多峰器件提供了一种简便的制造方法。