Piezoelectric hybrid organic-inorganic perovskites (HOIPs) have emerged as promising materials for the development of self-powered electronic devices. These hybrid systems generally have low elastic moduli and are also intrinsically brittle, limiting their applications in mechanical-to-electrical energy conversion. Here, we report the synthesis of TMCM-CdCl₃/PDMS (TMCM, trimethylchloromethyl ammonium; Cl, chloride; PDMS, polydimethylsiloxane) composites with high piezoelectricity. The TMCM-CdCl₃ micro-rods can adhere with PDMS chains via the C–H···Cl interactions, leading to effective absorption of strain and corresponding efficient conversion to electric polarization. As a result, the energy harvesting devices made by the composite films give a high power density up to 115.2 μW/cm², catching up with those of the state-of-the-art ceramic counterparts. In addition, the composite devices can harvest human motion energy and sense delicate body gestures. This work demonstrates that the piezoelectric HOIP/polymer composites can serve as promising materials for the development of self-powered flexible and wearable devices.

压电杂化有机-无机钙钛矿 (HOIP) 已成为开发自供电电子设备的有前途的材料。这些混合系统通常具有低弹性模量并且本质上也很脆，限制了它们在机械能到电能转换中的应用。在这里，我们报告了具有高压电性的TMCM-CdCl _{3 /PDMS（TMCM，三甲基氯甲基铵；Cl，氯化物；PDMS，聚二甲基硅氧烷）复合材料的合成。}TMCM-CdCl ₃微棒可以通过C-H···Cl相互作用与PDMS链粘附，从而有效吸收应变并相应地有效转换为电极化。因此，由复合薄膜制成的能量收集装置具有高达 115.2 μW/cm ^{2的高功率密度}，赶上了最先进的陶瓷同类产品。此外，复合设备可以收集人体运动能量并感知微妙的身体姿势。这项工作表明，压电 HOIP/聚合物复合材料可以作为开发自供电柔性可穿戴设备的有前途的材料。