Title of the Report: Hybrid Perovskites: Design and Properties Through Dimensionality Control

Speaker: Professor Wu Tao

Date and Time: April 22, 2024, 9:30 AM - 11:00 AM

Location: Room 301, Physics Building

Abstract:

As a new class of optoelectronic semiconductors, hybrid organic-inorganic metal perovskites perfectly combine the characteristics of organic and inorganic materials, offering a new fertile ground for exploring light-matter interactions. Although they have been studied by material scientists over a century ago, perovskites have attracted renewed intense interest from the academic community in the past decade due to their exceptional photovoltaic performance. The hybrid nature of organic-inorganic metal perovskites brings about a unique combination of physical properties, as well as a high degree of tunability in material dimensionality and associated unprecedented complexity. These cutting-edge materials provide high flexibility and new challenges in composition/structure/band engineering. Here, I will present several examples ranging from three-dimensional, two-dimensional to one-dimensional and zero-dimensional hybrid perovskites, illustrating how organic and inorganic structural components work together to determine the compound's characteristics. Considering the inherent complexity of components and structure in perovskite structures, high-throughput computation and machine learning are particularly suitable for accelerating the discovery and design of novel materials. I will discuss the use of high-throughput computation to generate large datasets containing structural and property information of various two-dimensional perovskite materials, which are further used to train and validate machine learning models to establish accurate relationships between the structure and properties of two-dimensional hybrid perovskites.

Biography of the Speaker:

Professor Wu Tao is an Endowed Chair Professor of Advanced Materials at the Department of Applied Physics, The Hong Kong Polytechnic University, and a Global STEM Scholar. He received his bachelor’s degree from Zhejiang University and his Ph.D. from the University of Maryland, College Park. Before joining The Hong Kong Polytechnic University, Professor Wu worked at Argonne National Laboratory in Chicago, Nanyang Technological University (NTU) in Singapore, King Abdullah University of Science and Technology (KAUST) in Saudi Arabia, and the University of New South Wales (UNSW) in Sydney. Professor Wu has authored over 400 peer-reviewed papers, with approximately 34,000 citations and an H-index of 97 (Google Scholar), making him one of the highly cited researchers according to Clarivate Analytics. His research group explores oxide thin films, nanomaterials, and hybrid perovskites, studying the electronic, magnetic, and optical functionalities of advanced materials. He also serves as an Associate Editor for ACS Applied Materials & Interfaces.

All faculty members and students are welcome to attend!