Proceedings of MATSUS Fall 2023 Conference (MATSUSFall23)
DOI: https://doi.org/10.29363/nanoge.matsus.2023.312
Publication date: 18th July 2023
In recent years, the investigation of strong light-matter coupling has emerged as a powerful avenue to manipulate and control the excitonic properties of organic materials. Strong light-matter coupling leads to the formation of hybrid light-matter states called exciton-polaritons, which have the potential to revolutionise the future of molecular electronics owing to their promise to induce long-range energy transfer [1]. One intriguing aspect of strong coupling is its potential impact on processes involving excited triplet states, such as triplet-triplet annihilation (TTA), which plays a significant role in organic photophysics and optoelectronic devices through upconversion.
This talk discusses the intricate interplay between strong light-matter coupling and triplet-triplet annihilation in organic materials. We explore how the formation of exciton-polaritons modifies the TTA process, potentially affecting the rate of triplet-state quenching and singlet exciton generation which influences the delayed-emission dynamics [2]. Through a combination of advanced spectroscopic techniques, we explore the underlying mechanisms governing the interactions between exciton-polaritons and triplet excitons.
Our findings provide valuable insights into the fundamental photophysical processes in the strong-coupling regime and pave the way for novel strategies to enhance the efficiency of organic optoelectronic devices. By elucidating the intricate dynamics of triplet-triplet annihilation under strong light-matter coupling, we contribute to the broader understanding of excitonic interactions and offer a new perspective on designing advanced organic materials for next-generation optoelectronics.
This work was supported by the Engineering and Physical Science Reserach Council (EPSRC) through the Molecular Photonic Breadboards programme grant (EP/T012455/1).
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