Metal-free small molecule-based piezoelectric energy harvesters.

Organic and metal-free molecules with piezoelectric and ferroelectric properties have gained wide interest for their applications in the domain of mechanical energy harvesting due to their desirable properties such as light weight, thermal stability, mechanical flexibility, feasibility to achieve high Curie temperatures, and ease of synthesis. However, the understanding and design of these materials for piezoelectric energy harvesting applications is still in its early stages. This review paper presents a comprehensive overview of the fundamental characterization of piezoelectricity for a range of organic ferro- and piezoelectric materials and their composites.

A Highly Electrostrictive Salt Cocrystal and the Piezoelectric Nanogenerator Application of Its 3D-Printed Polymer Composite.

Ionic cocrystals with hydrogen bonding can form exciting materials with enhanced optical and electronic properties. We present a highly moisture-stable ammonium salt cocrystal [CHCHCH(CH)NH][CHCHCH(CH)NH][PF] () crystallizing in the polar monoclinic 2 space group. The asymmetry in was induced by its chiral substituents, while the polar order and structural stability were achieved by using the octahedral PF anion and the consequent formation of salt cocrystal.

Ferroelectric Organic-Inorganic Hybrid Ammonium Halogenobismuthate(III) for Piezoelectric Energy Harvesting.

Halogenobismuthate(III) compounds are of recent interest because of their low toxicity and distinct electrical properties. The utility of these materials as ferroelectrics for piezoelectric energy harvesters is still in its early stages. Herein, we report a hybrid ammonium halogenobismuthate(III) , crystallizing in a ferroelectrically active polar noncentrosymmetric 2 space group.

3D-printed polymer composite devices based on a ferroelectric chiral ammonium salt for high-performance piezoelectric energy harvesting.

Three-dimensional printing (3DP) is an emerging technology to fabricate complex architectures, necessary to realize state-of-the-art flexible and wearable electronic devices. In this regard, top-performing devices containing organic ferro- and piezoelectric compounds are desired to circumvent significant shortcomings of conventional piezoceramics, toxicity and high-temperature device processibility. Herein, we report on a 3D-printed composite of a chiral ferroelectric organic salt {[MeCCH(Me)NH][BF]} (1) with a biodegradable polycaprolactone (PCL) polymer that serves as a highly efficient piezoelectric nanogenerator (PENG).

A Ferroelectric Aminophosphonium Cyanoferrate with a Large Electrostrictive Coefficient as a Piezoelectric Nanogenerator.

Hybrid materials possessing piezo- and ferroelectric properties emerge as excellent alternatives to conventional piezoceramics due to their merits of facile synthesis, lightweight nature, ease of fabrication and mechanical flexibility. Inspired by the structural stability of aminophosphonium compounds, here we report the first A BX type cyanometallate [Ph ( PrNH) P] [Fe(CN) ] (1), which shows a ferroelectric saturation polarization (P ) of 3.71 μC cm .

Ferroelectricity and Piezoelectric Energy Harvesting of Hybrid ABX-Type Halogenocuprates Stabilized by Phosphonium Cations.

Perovskite-structured compounds containing organic cations and inorganic anions have gained prominence as materials for next-generation electronic and energy devices. Hybrid materials possessing ferro- and piezoelectric properties are in recent focus for mechanical energy harvesting (nanogenerator) applications. Here, we report the ferroelectric behavior of ABX-type halogenocuprate materials supported by heteroleptic phosphonium cations.

A Flexible Energy Harvester from an Organic Ferroelectric Ammonium Salt.

Organic ferroelectrics due to their low cost, easy preparation, light weight, high flexibility and phase stability are gaining tremendous attention in the field of portable electronics. In this work, we report the synthesis, structure and ferroelectric behavior of a two-component ammonium salt 2, containing a bulky [Bn(4-BrBn)NMe ] (Bn=benzyl and 4-BrBn=4-bromobenzyl) cation and tetrahedral (BF ) anion. The structural analysis revealed the presence of rich non-classical C-H⋅⋅⋅F and C-H⋅⋅⋅Br interactions in this molecule that were quantified by Hirshfeld surface analysis.