All-polymer piezo-ionic-electric electronics
Tianpei Xu, Long Jin, Yong Ao, Jieling Zhang, Yue Sun, Shenglong Wang, Yuanxiao Qu, Longchao Huang, Tao Yang, Weili Deng, Weiqing Yang
Abstract
Abstract Piezoelectric electronics possess great potential in flexible sensing and energy harvesting applications. However, they suffer from low electromechanical performance in all-organic piezoelectric systems due to the disordered and weakly-polarized interfaces. Here, we demonstrated an all-polymer piezo-ionic-electric electronics with PVDF/Nafion/PVDF (polyvinylidene difluoride) sandwich structure and regularized ion-electron interfaces. The piezoelectric effect and piezoionic effect mutually couple based on such ion-electron interfaces, endowing this electronics with the unique piezo-ionic-electric working mechanism. Further, owing to the massive interfacial accumulation of ion and electron charges, the electronics obtains a remarkable force-electric coupling enhancement. Experiments show that the electronics presents a high d 33 of ~80.70 pC N −1 , a pressure sensitivity of 51.50 mV kPa −1 and a maximum peak power of 34.66 mW m −2 . It is applicable to be a transducer to light LEDs, and a sensor to detect weak physiological signals or mechanical vibration. This work shows the piezo-ionic-electric electronics as a paradigm of highly-optimized all-polymer piezo-generators.