Flexible Over-Moded Resonators Based on P(VDF-TrFE) Thin Films With Very High Temperature Coefficient

TL;DR

This paper introduces a novel flexible over-moded resonator made from P(VDF-TrFE) thin films on elastic substrates, demonstrating high temperature sensitivity and potential for low-cost temperature sensing applications.

Contribution

First demonstration of a flexible over-moded resonator based on P(VDF-TrFE) films with high temperature coefficient of frequency.

Findings

Frequency varies linearly with temperature

Temperature coefficient of frequency exceeds 1600 ppm/°C

Resonator shows promising temperature sensing performance

Abstract

This work presents for the first time a flexible over-moded resonator (OMR) based on P(VDF-TrFE) thin films. The devices were manufactured on commercially available elastic substrate with inkjet-printed electrodes. The sensing copolymer films used in the devices were polarized by the corona method after electrode deposition. The main performance parameters of the component were then determined. The manufactured OMRs on P(VDF-TrFE) exhibited a linear variation of frequency versus temperature and a very large value of temperature coefficient of frequency (TCF > 1600 ppm/degrees C). These properties suggest a great potential for using such components as low-cost and high-precision temperature sensors. The electromechanical coupling coefficient and the quality factor of the resonator were also characterized versus temperature.