Harnessing Plasticity in an Amine‐Borane as a Piezoelectric and Pyroelectric Flexible Film

Abstract

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 % 10-16 pC N À1 , and pyroelectric coefficient of p % 25.8 mC m À2 K À1 were achieved after poling, with high pyroelectric figure of merits for sensing and harvesting, along with a relative permittivity of e s 33 %6.3.Supporting information and the ORCID identification number(s) for the author(s) of this article can be found under https://doi.

The Mechanism of Piezocatalysis: Energy Band Theory or Screening Charge Effect?

“…Similarly, an alternating pyroelectric polarization resulting from the temperature fluctuation also gives rise to the same effect, as shown in Figure 5 d–f. As a consequence of the spontaneous polarization of pyroelectrics, screening charges are adsorbed on the two polar surfaces initially and experience a subsequent release (or adsorption) as a result of weakened (or strengthened) polarization with the temperature change (d T /d t ≠0) [38b] . In brief, the change in polarization as a result of either piezoelectric or pyroelectric effects is able to facilitate the dynamic screening phenomenon.…”