Enhanced energy harvesting based on surface morphology engineering of P(VDF-TrFE) film

Enhanced Ferroelectric Property of P(VDF‐TrFE‐CTFE) Film Using Room‐Temperature Crystallization for High‐Performance Ferroelectric Device Applications

“…In the fi gure, the grey curve shows a transfer curve of before P(VDF-TrFE-CTFE) deposition and a black curve shows after P(VDF-TrFE-CTFE) deposition. Harvested energy from the SEG and TEG was respectively more than 20 times and 5 times higher than those from P(VDF-TrFE) based energy harvesters in our previous work, [ 23 ] which is attributed to the inherently high electromechanical response, elastic energy density, and a higher dielectric constant in P(VDF-TrFE-CTFE). Details of the electrical poling process are described in the Experimental Section.…”

“…[ 23,29 ] As revealed by surface potential measurements in Figure 4 a, the SA fi lm showed more than two times higher surface potential than that of the TA fi lm, which is attributed to electric dipoles in the SA fi lm. Surface potential provides useful information for demonstrating the electrical properties of the surface that are induced by electric charges and/or dipoles.…”

“…Furthermore, the ferroelectric properties of these polymers are often comparable to those of their inorganic counterparts. Compared to the conventional process of thermal annealing (TA), a room temperature annealing method, solvent annealing (SA), [ 22,23 ] was applied to a spin-coated polymer fi lm in order to avoid crystallizing the material above the F-P transition temperature. [5][6][7] Among the various PVDF-based polymers, the class of terpolymers have shown signifi cantly improved inherent dielectric constant (κ) and electromechanical properties, which are necessary requirements for electronic and energy applications.…”

“…Due to the spontaneous polarization of the electric dipoles in an SA fi lm, a shift of the threshold voltage was observed after P(VDF-TrFE-CTFE) deposition on the indium gallium zinc oxide (IGZO) channel as shown in Figure 4 b. [ 23,30,33 ] A certain surface polarity and higher surface charge density induced by electric dipoles are important factors for attaining higher electrical energy, which means higher surface potential on an SA fi lm can generate more electrical energy than a TA fi lm. Thickness information for other concentrated solution is shown in the Supporting Information.…”

A Piezoelectric Energy Harvester Utilizing Pb[ZrxTi1−x]O3 Thick Film on Phosphor Bronze

“…(1,2) However, how to power these devices has become an issue. (3)(4)(5) Energy harvesters based on MEMS technology can convert vibration energy excited in our environment into a source of electrical energy to power these devices and has become a hot research topic of many research groups.…”