Formulation, printing, and poling method for piezoelectric films based on PVDF–TrFE

Abstract

Polyvinylidene fluoride- trifluoroethylene (PVDF–TrFE) has been utilized widely for pressure sensing, healthcare monitoring, and energy harvesting. In order to integrate piezoelectric elements into flexible thin film electronics, researchers have studied depositing PVDF–TrFE via printing methods. Screen printing, in particular, has been utilized by several groups but printing methodology and characterization procedures have varied significantly between works. In this work, a simple, low-cost, flexible method is described. The resulting films are characterized for their piezoelectric character and temperature tolerance. The printed films have a piezoelectric coefficient comparable to previous work (26.24 pC/N) and demonstrate no meaningful degradation in piezoelectric character up to 110C.

Enhanced Piezoelectric Coefficient of PVDF-TrFE Films via In Situ Polarization

“…With the rapid development of smart wearable devices, the energy conversion efficiency, flexibility, and transparency are the most important features of PENGs. As the most studied polymer for PENG, PVDF-TrFE has relative low remnant polarization and piezoelectric coefficient but irreplaceable flexibility and transparency (Chan et al, 2003;Pi et al, 2014;Mcginn et al, 2020). Thus, it is vital to improve the piezoelectric properties of PVDF to promote its value in the smart wearable device applications.…”

Remarkable piezoelectric properties in thin films of cellulose nanofibers after electrochemical poling

“…Electrochemical poling: poling with electrolysis Electric poling has been successfully applied to enhance the alignment of the electric dipoles in ferroelectric materials, thus improving their piezoelectric performance [26]. However, we did not observe typical ferroelectric poling current as typically found for P(VDF-TrFE) (Supplementary Fig.…”

Toward High-Performance Green Piezoelectric Generators Based on Electrochemically Poled Nanocellulose

“…Electric poling is known to enhance the alignment of the electric dipoles in ferroelectric materials, thus improving their piezoelectric performance. 30 When sweeping the CNF films with increasing voltage between −110 and 110 V (Figure S5), we did not observe typical ferroelectric poling current found for P(VDF-TrFE) with a typical step function with a hysteresis (Figure S6). Hence, the CNF film does not exhibit any ferroelectric properties.…”