Meet the jury seminar: Interfacial control of hot carrier cooling in plasmonically-enhanced halide perovskites

We kindly invite you to join the ‘Meet the Jury’ seminar, featuring an international speaker to discuss their research on 'Interfacial control of hot carrier cooling in plasmonically-enhanced halide perovskites'. 

This seminar will be given by:

• Rachith S. N. Kumar

is a Director's Postdoctoral Fellow at the National Laboratories of the Rockies in Colorado, studying light-matter phenomena, exciton-photon coupling, and hot-carrier dynamics. He earned his PhD at Hasselt University (IUMAT, Belgium) in 2023 and is the inventor of two technologies for vacuum-free ultrathin films. His research includes plasmon-enhanced OLEDs and halide-perovskite photophysics, with 16 publications.

This lecture will show that adding a nanometer-scale spacer between Ag-Au nanoparticles and a MAPbBr3 film modulates these interfacial processes and influences plasmon-derived energy. Using transient absorption spectroscopy to measure carrier temperature (Te), we find that direct metal contact leads to the fastest cooling due to energy back-transfer. Semiconducting TiO2 enhances hot-electron extraction and cooling (5-9 ps), while insulating Al2O3 slows down cooling (approximately 16 ps). The notable effects are observed only under 2.48 eV excitation, confirming their plasmonic nature. Our results suggest that interfacial energy-transfer pathways largely govern hot-carrier cooling in these structures

This is a Meet the Jury seminar. Additional information on how to apply for these seminars can be found here.

For whom?

• PhD's & postdocs.

When and where?

• August 24, 2026 - 15:30-16:30
• Lecture Hall H3, Building D, Campus Diepenbeek

Registration?

• Registration is possible via this link.