Planar jet printing of localized Ni/P(VDF-TrFE)/Ni structures for piezo- and pyroelectric matrixes

Abstract

This paper describes manufacturing the film structures based on a polar copolymer of poly(vinylidene fluoride-trifluoroethylene) P(VDF-TrFE) using the process of drop-by-drop local deposition on metallized substrates. The produced samples were a crossbar structures of arrays of ferroelectric P(VDF-TrFE) microislands metallized with nickel stripes using a combined 2D printing method. For the polymer layer deposition, a number of solvents with different viscosities and dipole moments of molecules were considered, and their influence on the geometry and the polar properties of printed layers was shown. Using the piezoelectric force microscopy, the value of the piezoelectric modulus of d33 at the nanoscale level was determined. This d33 modulus is similar to values of d33 for P(VDF-TrFE) films produced by the standard solvent cast method. On the base of amplitude of the pyroelectric current in the dynamic method, the value of the pyroelectric coefficient (p) was determined, varying from 2*10–5 to 4*10–5 C/(m2*K). These values are comparable to the pyroelectric coefficient of films P (VDF-TrFE) produced by the standard method. The highest values of d33 and p correspond to structures produced from solutions containing more than 20% of propylene carbonate in the initial solvent, the molecules of which have a large (4,9 D) dipole moment.

Keywords

• ferroelectric polymer
• 2d printing
• piezoelectric effect
• pyroelectric effect
• piezoelectric force microscopy