Structure Modulation and Stability Mechanisms of Perovskite Photovoltaic Devices

Lecture Topic: Structure Modulation and Stability Mechanisms of Perovskite Photovoltaic Devices
Expert: Li Guixiang
Date: December 1, 2025
Time: 10:00
Location: Room 1501, Energy Research Institute
Organizer: Energy Research Institute

Speaker Profile:
Li Guixiang is a Young Chief Professor and doctoral supervisor at Southeast University, recognized as a national-level young talent and a European Union Marie Curie Fellow. She earned her Ph.D. from the Helmholtz-Zentrum Berlin für Materialien und Energie in Germany and subsequently conducted postdoctoral research at the École Polytechnique Fédérale de Lausanne (EPFL) in Switzerland and Northwestern University in the United States. Her research focuses on optoelectronic functional materials and energy devices. She has published over 70 papers in international academic journals. In recent years, she has authored or co-authored more than 30 papers as the corresponding or first author in prestigious journals such as Science, Nature Reviews Materials, Nature Photonics, Advanced Materials, and Angewandte Chemie, with several papers listed as ESI Highly Cited Papers or Hot Papers. She has also co-authored one English monograph. She serves on the editorial boards of Discover Sustainability and Scientific Reports. She has led projects including the National Natural Science Foundation High-Level Youth Project, the National Natural Science Foundation Youth Project, the Jiangsu Provincial Basic Research Program, and projects under the EU Framework Programme for Research and Innovation. She was selected as one of the first cohort of "U35 Cultivation" young scientific and technological talents in Jiangsu Province and has received a provincial-level second prize in Natural Science.

Research Expertise: Fundamental research and key technologies for the application of perovskite solar cells in photoelectric conversion.

Lecture Summary:
Halide perovskite solar cells are emerging as a significant direction for next-generation photovoltaic technology due to their excellent photoelectric conversion performance and low-cost potential. However, the long-term stability of these devices under multiple environmental stresses such as temperature, humidity, and light exposure remains a core bottleneck for industrial application. This presentation systematically explores the intrinsic structural stability of perovskite photovoltaic devices and the regulation mechanisms at interfaces and transport layers. It focuses on the structural response and phase transition dynamics of perovskites under thermal cycling and coupled light-thermal conditions, revealing the coupling mechanisms of ion migration, phase boundary stress, and defect evolution. Further, through compositional engineering, interface layer construction, and stress mitigation design, the study achieves stable interface formation and optimized band alignment between charge transport layers and the perovskite active layer. The research also investigates the crystallization kinetics of non-lead-based low-toxicity perovskites and their impact on stability. By employing multidimensional strategies ranging from the intrinsic material structure to interface energy level regulation, this work aims to provide scientific insights and design principles for the long-term reliable operation of perovskite photovoltaic devices in complex environments.

Faculty and students are welcome to attend!