Speaker:
Prof. Yeng Ming Lam, Nanyang Technological University.
Tittle: Perovskite Solar Cells Performance: Insights into Degradation and Stability Enhancement
Time: 15:00 March 26th, 2026 (Thursday)
Venue: Conference Room 6, Building No.5
Host: Prof. Huiqiong Zhou
Abstract:
Organic-inorganic hybrid perovskites have emerged in recent years as one of the most promising materials for solution-processed electronics and optoelectronics including solar cells, light-emitting diodes and field-effect transistors. There is an active exploration of different organic molecules contribution to the materials behaviour and also the use of novel interfacial layer and their functions to improve the performance of the devices. The key to the successful implementation of any materials systems depends very much on the understanding of degradation mechanism and the how facile is the methodology for the improvement. In this presentation, it will be shown on how the understanding of the materials can lead to simple solution with good outcome. A unified understanding of the complexity describing the degradation of these type of materials is absent and in this work one common hybrid perovskite material - methylammonium lead iodide (MAPI) is used as a vehicle to show how a unified understanding can be achieved using a complementary characterization techniques.
In solar cells application, there are two critical performance indicators – efficiency and stability. Two layers combination making up of three-dimensional (3D) perovskite capped with low-dimensional (LD) perovskites materials have shown be an effective strategy in resolving the compromise that we have to live with for hybrid perovskites – compromise between photovoltaic efficiency and operational stability. In the study, instead of the conventional LD capping layers containing Pb2+ or Sn2+, we showed that through a full precursor technology option2, it is possible to access a wider cation library for these capping layers.(1) Through this method, high efficiency cells can be achieved.
Info.:
Yeng Ming LAM (FRSC) received her Ph.D. degree in Materials Science and Metallurgy from the University of Cambridge, UK, in 2001. She is currently a Professor and holds the President Chair in Materials Science and Engineering. Yeng Ming is also the Director of the Facility for Analysis, Characterization, Testing and Simulations (FACTS), a university facility for advanced characterization using electrons and X-ray since 2016. She was the Chair of the School of Materials Science and Engineering (MSE), NTU, from Jan 2019 to Dec 2024. Her research aims to understand and design novel nanostructured functional nanomaterials for application in sustainable energy, sustainable food production and also environment remediation. She is the co-Chair of the governing board for International Symposium for Polymer Analysis and Characterization (ISPAC), USA. She held a concurrent Senior Scientist position in RWTH University in Aachen, Germany, between 2011 and 2014 and a concurrent Senior Scientist position in IMRE, A*Star, from 2010-2011. She was awarded the the inauguration L'Oréal Unesco For Women in Science National Fellowship and the Nanyang Outstanding Young Alumni Award in 2009. In 2024, she was awarded the ASEAN-US Science Prize for Women (Senior Category, First Prize). In 2025, she was named Top 50 Asia Women Tech Leaders 2025 and is the current SEARCA Regional Professorial Chair 2025-2026. She was awarded American Chemical Society (ACS) Salute to Excellence Award and she is also the elected Academician of Asia Pacific Academy of Materials (APAM) in 2025.
