Low‐Power Piezoelectric Energy From Chiral Supramolecular Polymer of a Donor–Acceptor–Donor Conjugated π‐System
Year: 2025
Type: article
Abstract: Soft piezoelectric systems have high demands in flexible, shape conformable and biocompatible low‐power electronics. This paper explores chiral supramolecular polymerization of an ambipolar donor–acceptor–donor (DAD)‐type π‐system showing emerging piezoelectric properties for harvesting micro energies. The DAD molecule is designed with two conjugated thiophene donors with a central naphthalene‐diimide (NDI) acceptor chromophore to facilitate intra‐molecular charge‐transfer, evident from a prominent absorption band in the visible region. This chromophore is further appended with two chiral benzamide‐wedges for homochiral supramolecular polymerization. The ambipolar character of the chiral DAD chromophore is manifest from the cyclic voltammogram. Extended H‐bonding among the amide groups leads to homochiral supramolecular polymerization in methyl‐cyclohexane, which is retained in the solid film. The impeccable piezoelectricity in poled DAD film revealed a d 33 ∼ 7 pm/V as measured by the piezoforce microscopy. Poled piezo DAD devices under optimized periodic external impact force, frequencies and supplied electric field generate a viable output voltage and current density of 1.3 V, 0.8 µA/cm 2 , and P output ∼ 1.6 µW/cm 2 , respectively. As a proof‐of‐concept demonstration, stacked and poled supramolecular π‐conjugated DAD devices are shown to viably illuminate a light emitting diode through charging a series of micro capacitors, indicating the potential utility for low power technologies.
Source: Chemistry - A European Journal
Authors: Swadesh Paul, Aritri Pal, Suhrit Ghosh, Anuja Datta
Institution: Indian Association for the Cultivation of Science
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4409075249