报告题目：Crystalline perovskite materials conquering the challenges toward
stable optoelectronics
报 告 人：Elke Debroye （比利时鲁汶大学）
报告时间：2024年8月19日（星期一）下午16:00-17:00
报告地点：激光光谱研究所三层报告厅
报告简介：
Metal halide perovskites are a class of semiconductors that have garnered a tremendous amount of attention for application in optoelectronic devices. These low-cost materials exhibit outstanding properties, such as efficient light absorption, tunable emission, and good charge carrier transport. As an example, perovskites have accomplished a rapid rise in solar power conversion efficiency to over 25% in less than a decade, outperforming the conventional silicon solar cells. However, the fundamental understanding of their intrinsic properties related to their photophysical performance is lagging behind, but is necessary to improve the materials even more. Moreover, upon studying new perovskite materials for optoelectronic devices, it is often overlooked that it is not only important to evaluate their (superior) performance, but also their long-term stability. We have applied different synthesis strategies to obtain perovskite systems with a large variety in composition, structure, morphology, and sizes. I will discuss how we apply a set of advanced spectroscopic tools to detail the interplay of crystalline properties and charge carriers that govern the optoelectronic performance. Furthermore, I will highlight the importance of micro-engineering the perovskites’ chemistry, structure, and morphology toward an improved material platform for next-generation optoelectronics, with a focus on X-ray detector devices.
报告人简介：
Elke Debroye graduated as Master in Chemistry at KU Leuven in 2009 and obtained a PhD in bio-inorganic chemistry at KU Leuven in 2013 on developing novel MRI/ luminescent contrast agents. After that, she changed fields and became a postdoctoral fellow working on the synthesis and advanced characterization of semiconductor materials at the Laboratory for photochemistry and spectroscopy. After three long-term research visits with prof. Liz-Marzán in San Sebastian (Spain), prof. Majima at Osaka University (Japan) and prof. Bonn at MPI Mainz (Germany), she was appointed professor at KU Leuven in October 2021 within the Department of Chemistry (www.debroyegroup.com). She is an expert in the application of novel spectroscopy/ microscopy tools for in depth characterization of (in)organic semiconductor materials. Via this approach, she aims to rationalize the development of materials, in particular perovskite materials, with improved optoelectronic properties for application in photodetectors, catalysis, as well as LEDs. With her recently awarded ERC Starting Grant (2023-2028) she will further develop state-of-the-art characterization tools based on ultrafast spectroscopy to study the use of novel lead-free perovskites for X-ray detection.