Understanding and Advancing Perovskite Materials toward Stable and Efficient Optoelectronics

Guest Speaker： Assoc.Prof. Elke Debroye，KU Leuven, Belgium

Inviter: Assoc.Prof. Feili Lai

Date&Time: Friday, 5th Jun.  15:30-16:30

Venue: Meeting Room 308， Xu Zuyao Building

Biography:

Elke Debroye is associated professor at the Department of Chemistry, KU Leuven, Belgium. Her research focuses on the development of advanced spectroscopy and microscopy tools to elucidate the photophysics of (in)organic semiconductors, with particular emphasis on metal halide perovskites. By combining detailed structural characterization with time-resolved photoluminescence and THz photoconductivity measurements, her group uncovers fundamental physicochemical processes and translates these insights into rational design and stabilization strategies to improve optoelectronic performance of next-generation devices such as LEDs, photoconversion technologies, and other emerging energy applications. Her research efforts have been awarded with a prestigious ERC Starting grant in 2023. https://www.debroyegroup.com/

Abstract:

Metal halide perovskites have emerged as a highly promising class of semiconductors for optoelectronic applications due to their exceptional light absorption, tunable emission, and efficient charge transport. These cost-effective materials have demonstrated an unprecedented rise in solar power conversion efficiency, surpassing 25% within a decade, outpacing conventional silicon photovoltaics. However, fundamental insights into their intrinsic photophysical properties remain incomplete, yet are crucial for further performance enhancements. Additionally, while the impressive efficiency of novel perovskite materials is often emphasized, their long-term stability is equally vital for practical implementation.

In this talk, I will present the development of perovskite systems with diverse compositions, structures, and morphologies using various synthesis strategies. By employing advanced spectroscopic techniques, we elucidate the interplay between crystalline structure and charge carrier dynamics that dictate their optoelectronic performance. Additionally, photoluminescence (PL) microscopy imaging is being exploited correlating materials’ photochemistry and intrinsic defects to optoelectronic device performance, providing direct insight into their function in real-world applications. I will demonstrate how chemical micro-engineering can optimize perovskite stability and functionality, with a focus on improving X-ray detection performance. Finally, I will present strategies for fabricating high-quality flexible photoactive layers, including controlled film deposition, as critical components for next-generation stable optoelectronics.