Dr. Maria Antonietta Loi, University of Groningen
COLLOIDAL QUANTUM DOT SUPERLATTICES: TOWARDS OPTOELETRONIC METAMATERIALS
Abstract – 3D superlattices made of colloidal quantum dots are a promising candidate for the next generation of optoelectronic devices as they are expected to exhibit a unique combination of tunable optical properties and coherent electrical transport through minibands. In my presentation I will show the fabrication of 3D superlattices of PbSe and PbS QDs with nanoscale-level controlled ordering over large areas [1, 2], and of outstanding transport properties. The measured electron mobilities for PbSe superlattices are the highest ever reported for a self-assembled solid of fully quantum-confined objects (electron mobility up to 278 cm2 V−1 s−1). This ultimately demonstrates that optoelectronic metamaterials with highly tunable optical properties (in this case in the short-wavelength infrared spectral range) and charge mobilities approaching that of bulk semiconductor can be obtained. This finding paves the way toward a new generation of optoelectronic devices.
References:
[1] J. Pinna, R. Mehrabi Koushki, D. S. Gavhane, M. Ahmadi, S. Mutalik, M. Zohaib, L. Protesescu, B. J. Kooi, G. Portale, M. A. Loi, Approaching Bulk Mobility in PbSe Colloidal Quantum Dots 3D Superlattices. Adv. Mater., 35, 2207364 (2023).
[2] J. Pinna, E. Pili, R. Mehrabi Koushki, D. S. Gavhane, F. Carlà, B. J. Kooi, G. Portale, and M. A. Loi PbI2 Passivation of Three Dimensional PbS Quantum Dot Superlattices Toward Optoelectronic Metamaterials ACS Nano, 18, 29, 19124 (2024).
Bio – Maria Antonietta Loi studied physics at the University of Cagliari in Italy where she received the PhD in 2001. In the same year she joined the Linz Institute for Organic Solar cells, of the University of Linz, Austria as a postdoctoral fellow. Later she worked as researcher at the Institute for Nanostructured Materials of the Italian National Research Council in Bologna, Italy. In 2006 she became assistant professor and Rosalind Franklin Fellow at the Zernike Institute for Advanced Materials of the University of Groningen, The Netherlands. She is now full professor in the same institution and chair of the Photophysics and OptoElectronics group.
She has published more than 300 peer-reviewed articles on photophysics and optoelectronics of different types of materials. In 2013 she has received an ERC Starting Grant and in 2022 and ERC Advanced Grant from the European Research Council. She currently serves as Editor-in-Chief of Applied Physics Letters and she is member of the international advisory board of several international journals in physics and materials physics. In 2018 she received the Physicaprijs from the Dutch physics association for her outstanding work on organic-inorganic hybrid materials. In 2020 she became fellow of the American Physical Society. In 2022 she was elected fellow of the Dutch Academy of Science (KNAW). In the same year she became fellow of the European Academy of Science (EURASC) and of the Royal Society of Chemistry. In 2025 she became Fellow of the Material Research Society.
Zoom Meeting ID 897 1535 6177 Passcode 199637