[cid:image004.jpg@01D685C0.EB336F80] The BNC Faculty Seminar Series is designed to provide faculty a platform to present an overview of their research and the opportunity for collaborative discussion with other BNC faculty and researchers across six colleges and 15 academic units. Letian Dou Charles Davidson Chair Assistant Professor of Chemical Engineering February 11th, 2021 | 12:00pm Join Zoom: https://purdue-edu.zoom.us/j/91754078808 Title: Organic-Perovskite Hybrid Quantum Wells, Heterostructure, and Optoelectronics Abstract: Halide perovskites are exciting new semiconductors that show great promising in low cost and high-performance optoelectronics devices including solar cells, LEDs, photodetectors, transistors, etc. However, the poor stability is limiting their practical use. In this talk, I will present a molecular approach to the synthesis of a new family of organic-inorganic hybrid perovskite quantum wells incorporating widely tunable organic semiconducting building blocks. Energy transfer and charge transfer between adjacent organic and inorganic layers are extremely fast and efficient, owing to the atomically-flat interface and ultra-small interlayer distance. Importantly, this rigid conjugated ligand design dramatically enhances materials' chemical stability and suppresses solid-state ion migration and diffusion, making them promising for real-world applications. Based on this, we demonstrate for the first time an epitaxial halide perovskite heterostructure with near atomically-sharp interface, which pave the way for perovskite nanoelectronics and nanophotonics. Finally, using this stable organic-perovskite hybrid quantum well concept, we demonstrate the fabrication of high-quality polycrystalline thin films and highly stable and efficient solar cells and LEDs as well as high mobility transistors. Bio: [cid:image003.jpg@01D6FE04.9F253B70] Dr. Letian Dou is currently the Charles Davidson Chair Assistant Professor of chemical engineering at Purdue University. He obtained his B.S. in Chemistry from Peking University in 2009 and Ph.D in Materials Science and Engineering from UCLA in 2014. From 2014 to 2017, he was a postdoctoral fellow at the Department of Chemistry, University of California-Berkeley and Materials Science Division, Lawrence Berkeley National Laboratory. His research interest includes the design and synthesis of organic-inorganic hybrid materials and low-dimensional materials, fundamental understanding of the structure-property relationships, as well as applications in high performance electronic and optoelectronic devices. He is a recipient of Office of Naval Research Young Investigator Award (2019), Highly Cited Researcher in Cross-Fields (2019-2020), MIT Technology Review Innovators Under 35-China Award (2018), and MRS Graduate Student Award (2014). Upcoming BNC Virtual Faculty Seminars, Spring 2021: Date Faculty Title 1/28/20 Dmitry Zemlyanov, Senior Research Scientist - Surface Science Application, Birck Nanotechnology Center Growth and characterization of 2D materials 2/4/21 Yi Xie, Assistant Professor, School of Nuclear Engineering Degradation of Structural Materials and Fuels in Nuclear Systems 2/11/21 Letian Dou, Assistant Professor, Davidson School of Chemical Engineering Organic-Perovskite Hybrid Quantum Wells, Heterostructure, and Optoelectronics 2/18/21 Nikhilesh Chawla, Ransburg Professor, School of Materials Engineering 4D Materials Science - Probing Microstructural Evolution Through Time-Resolved Imaging 2/25/21 Sorin Adam Matei, Associate Dean of Research and Graduate Education, College of Liberal Arts, Professor of Communication, Brian Lamb School of Communication Team Science - what it is, how it works, and why it does not always work the way we want it to work 3/4/21 David Cappelleri, Associate Professor of Mechanical Engineering Microrobotics Research Highlights 3/11/21 Stylianos Chatzidakis, Assistant Professor, School of Nuclear Engineering 3/18/21 Reading Day 3/25/21 Tyler Tallman, Assistant Professor, School of Aeronautics and Astronautics 4/1/21 Alex Chortos, Assistant Professor, Mechanical Engineering 4/8/21 Ajay Malshe, R. Eugene and Susie E. Goodson Distinguished Professor of Mechanical Engineering 4/15/21 Suranjan Panigrahi, Professor Electrical and Computer Engineering Technology 4/22/21 Alejandro Strachan, Professor of Materials Engineering 4/29/21 Dead Week 5/6/21 Finals Week Thanks! Jaime Turner Lead Administrative Assistant to the Director | Birck Nanotechnology Center BRK | 1205 W State Street | West Lafayette, IN 47907 o: 765-494-3509<tel:7654943509> | m: 765-491-3064<tel:7654913064> | jjturner@purdue.edu<mailto:jjturner@purdue.edu> [83324AA6]<https://www.purdue.edu/>