Harnessing plasticity in an amine-borane as a piezoelectric and pyroelectric flexible film

We demonstrate that trimethylamine borane can exhibit desirable piezoelectric and pyroelectric properties. The material was shown to be able operate as a flexible film for both thermal sensing, thermal energy conversion and mechanical sensing with high open circuit voltages (>10 V). A piezoelectric coefficient of d${}_{33}$$\approx$ 10-16 pC N${}^{-1}$, and pyroelectric coefficient of p $\approx$25.8 μC m${}^{-2}$ K${}^{-1}$ were achieved after poling, with high pyroelectric figure of merits for sensing and harvesting, along with a relative permittivity of ${\epsilon }_{33}^{\sigma }$$\approx$ 6.3. (© 2020 Wiley‐VCH Verlag GmbH and Co. KGaA, Weinheim)