MCI seminar, 30 June:
Multiferroic BiFeO3-baes films for hybrid energy harvesters
By prof. Graziella Malandrino, Department of Chemistry, University of Catania
Dipartimento di Scienze Chimiche, Universita degli Studi di Catania, INSTM UdR Catania, Viale Andrea Doria 6, I-95125 Catania. E-mail: email@example.com
Inorganic perovskites are key materials for many technologies going from high Tc superconductors to high-k dielectrics, from piezoelectric to colossal magnetoresistance materials, from ionic conductors to multiferroics.
Perovskites are compounds with ABX3 formula where the anion X together with A form a cubic compact packing, thus A is twelve coordinated, while B, occupying the octahedral holes, has a six-coordination. The countless potentialities of perovskites arise from the possibility to dope both
the A and B sites giving rise to a great variety of compositions and properties.
BiFeO3 is a perovskite multiferroic material and can maintain its properties in extreme environments thanks to its Curie and Neel temperatures well above room temperature. Photoelectric, pyroelectric and piezoelectric properties are the most studied and appealing characteristics, which make BiFeO3 an important material for energy harvesting applications. The possibility of combining the above-mentioned properties in a single device, a hybrid energy harvester, makes BiFeO3 one of the most promising materials for the next generation of lead-free harvesters.
In this talk, a simple synthetic strategy based on metal-organic chemical vapour deposition (MOCVD) for the fabrication of BiFeO3 perovskite thin-films will be presented. MOCVD deposition technique offers a large number of advantages compared to other thin-films production methods with a wide choice of industrial precursors, high-quality substrates and upscale opportunities. The versatility conceded by the MOCVD technique allowed the production of a large quantity of undoped and doped BiFeO3 films, deposited on SrTiO3:Nb (100) substrates. Ferroelectric, dielectric and pyroelectric properties of Bi1−xDyxFeO3 (x = 0, 0.06, 0.08 and 0.11) thin-films will be discussed showing that these films are very promising as lead-free pyroelectric energy harvesters.
Time & Zoom link
30 June 2021, 15.00 - 16.00
Online via Zoom: https://syddanskuni.zoom.us/j/61023221496
Host: Yogendra Kumar Mishra
To protect the environment, we only provide an online version of the abstract. Should you need to print it, you can contact Sabina Petersen to get a pdf version.