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 d33 approximately 10-16 pC N(-1) , and pyroelectric coefficient of p approximately 25.8 muC m(-2) K(-1) were achieved after poling, with high pyroelectric figure of merits for sensing and harvesting, along with a relative permittivity of 33 sigma approximately 6.3.