Organic-Inorganic Hybrid Perovskite Piezoelectrics: Towards a New Paradigm
Speaker: Aron Huckababa
Affiliation: University of Kentucky
Date: March 28th
Abstract: Piezoelectric force sensors are pervasive in modern society and they are used in a variety of applications like remote monitoring for healthcare, fatigue sensing of windmill propeller blades, analog-to-digital conversion devices, and many others.1 Ceramics such as Lead zirconium titanate (PZT) and Barium titanate (BTO) and polymers like poly (vinylidene difluoride) (PVDF) have been the gold standard materials, but recently organic-inorganic hybrid perovskites (OIHPs) have come to the forefront of the field. OIHPs have a basic structure of Am+Bn+Xm+n, are simple to synthesize, highly crystalline, and can be processed with solution methods, each of which is not true for PZT and PVDF. Here we report novel piezoelectric perovskite materials and the study of their piezoelectric, ferroelectric, and non-linear optical properties. 2, 3 Using a wide variety of either chiral or achiral A site cations, transition metal and main group element B-site cations and X site anions have led to the formation of piezoelectric OIHPs. Results from measurements on single crystals and microcrystalline samples will be discussed, as will perspectives on the future of the field